Power Electronics Corporate Genealogy
Original Name 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 A-Systems ABB Acbel Polytech Acopian Technical Active Power Active Semiconductor Advanced Analogic Tech Allgemeine Elektricitat Gesellschaft (AEG) AEG Power Solutions Alcatel-Lucent Allegro Microsystems Amelco Semiconductor American Microsystems American Power Conversion Analog Devices Apex Microtechnology APtronic Applied Plasma Physics Argus Technology Computer Products Asea Allmanna Svenska Elektrika Aktiebolaget ASEA Power Systems Astec Power Astrodyne Ault Aura Systems Automatic Electric Balmar Basler Electric Company Bear Power Supplies Beckman Instruments BelFuse/BelPower Bell Labs Bellnix Benchmarq Microelectronics Bendix Best Power Technology Beta Dyne Bias Power Technology Bikor Boschert Inc. Bothhand Enterprise Bourns Brown Boveri & Cie Burle Technologies Burr Brown Bussmann C&D Technologies Calex Manufacturing Catalyst Semiconductor Cherokee International Cherry Semiconductor Chicony Electronics
ada cheng Page 1 6/13/11 Power Electronics Corporate Genealogy
Original Name 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Patil Systems Clevite Transistor Products Claude Lyons CogniPower GTI Power Systems Combined Technologies Communication Instruments Inc (CII Technologies) Communications & Power Industries Compagnie des Freins et Signaux Condor DC Power Supplies Controlled Power C&E Cooper 1833 Cooper-Hewitt ELCO CPI International Cree Cutter Electric & Manufacturing CyberPower Systems Dallas Semiconductor Delco Delta Electronics Densei-Lambda di/dt Digitronics Diodes ETA Electronics Industry ETM Electromatic Tobersen Gear and Axle Edal Industries Edison General Electric Merged with Thomson-Houston to form GE Edison Light Company Merged with other Edison companies to form Edison General Electric Elantec Semiconductor Electromanufactuas, S.A. de C.V. (EMSA) Electronic Transistors (ETCo) Electronic Specialists Electrowatt Eltek Energy Eltek Semiconductor Eltek Valere Emerson Network Power EMRISE Enerpro Ericsson EUPEC Exar Exide Electronics Group Exide Technologies Fairchild Semiconductor Falcon Electric Fayetteville Transformer Ferranti Ltd Ferranti Hammond Electric Light Ferranti, Thompson and Ince
ada cheng Page 2 6/13/11 Power Electronics Corporate Genealogy
Original Name 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Freescale Semiconductor Friemann & Wolf Duisburg (FRIWO) Friemann & Wolf Gerätebau (FRIWO) FSP Group Furman Sound Gaia Converter Galaxy Power GEC Plessey Semiconductors General Atomics Energy Products General Electric General Instruments General Microelectronics General Semiconductor General Telephone and Electronics General Transistor General Transistor Germanium Products Gould Storage Battery Hackbridge and Hewittic Electric Co., Ltd. Harris (Semiconductor) Electric Heating Apparatus Hind Rectifiers Ltd Hipro Electronics Hitachi Honeywell Huntkey Enterprise Group Hytek Microsystems Computing-Tabulating-Recording (C-T-R) Infineon Interdesign International Rectifier Intersil Invensys ITE Imperial IXYS iWatt Jenkins Electric Company JJ Electronic Kearney Kemet Kepco Kyle Corporation Lambda Electronics Leader Electronics Liebert Line Material Lineage Power Linear Technology Lite-On Technology Littlefuse Litton Engineering Laboratories Magnetek Marvell Technology
ada cheng Page 3 6/13/11 Power Electronics Corporate Genealogy
Original Name 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Maxim Integrated Products Maxwell Laboratories McGraw Electric McGraw-Edison Mean Well Enterprises Micrel Micro-Rel Microchip Technology Micro Linear MicroPlanet Technology Microsemiconductor Mitel Mitsubishi Electric Mobiletron Electronics Molectro Science Monolithic Power Systems Motorola MS Kennedy Murata Manufacturing Natel Engineering National Semiconductor National Union Radio NEMIC (Nippon Electronic Memory Industry Company) NEMIC-Lambda NetPower Technologies NXP Semiconductor O2Micro Oki Power Tech OmniRel ON Semiconductor OnLine Power Optimum Power Conversion Opto 22 Oryx Technology Pacific Semiconductors Partner Technologies Pascall Electronics PECO II Pennsylvania Transformer Technology Phihong Philco Philco Ford Microelectronics Philips (Semiconductor) Photonis Picor (Vicor) Pioneer Magnetics Plessey Power-One Power Paragon Power Trends PowerBright PowerDsine Powerex
ada cheng Page 4 6/13/11 Power Electronics Corporate Genealogy
Original Name 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Precision Monolithics Primarion Programmable Power Supply PULS Pulse Engineering Q.R.S. Music Qspeed Semiconductor Quantex Capital Radiation Radio Corporation of America (RCA) Radio Electronics & Television Manufacturers Association (RETMA) Radio Receptor Raytheon Renesas Technology REO Rheem Semiconductor RO Associates Rockwell Microelectronics RTE S. Z. de Ferranti Went into receivership Salcomp Samlex America Samsung Toho Sanken Electric SatCon Technology SB Electronics Schneider Electric 1836 Schrack Seletron Setec SGS-Fairchild SGS-Microelecttronica SGS-Thompson Shindengen Electric Manufacturing Shockley Transistor Siebe 1819 Siemens 1847 Telegraphen-Bau-Anstalt von Siemens & Halske Signetics Silcon A/S Silicon General Semiconductors Silicon Link Siliconix Sipex G-L Electronics SL Power Electronics SmartPower Systems Société Generale Semiconduttori (SGS) Sola Electric Sola/Hevi-Duty Solomon Solomon Technologies Tokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company) SPD Technologies
ada cheng Page 5 6/13/11 Power Electronics Corporate Genealogy
Original Name 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Sprague Electric Sprague Electric Railway and Motor Company Staco Energy Products Summit Microelectronics Sylvania Synqor Tamura TDI Power TDK Teccor Electronics Technitrol Telcom Semiconductor Teledyne Telefunken Electronic TEMIC Semiconductors Teridian Semiconductor (TSC) TESLAco Texas Instruments Thales Thomson Semiconducteurs Thomson-Houston Toshiba Tranformer and Electrical Company Ltd (TEC) Transistor Products Transitron TRW LSI Tsi Power Tyco Tyco Electronics US Digital Unison Technology Unitech Unitrode Valere Power Varian Associates Veeco Vicor Vincotech Virginia Transformer Vishay Volterra Semiconductor VPT WDC Technologies Western Electric Manufacturing 1869 Westinghouse Electric & Manufacturing Xandex Xantrex Technology Mitel Semiconductors Zeftronics Zetex Semiconductors Zilker Labs
ada cheng Page 6 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908Original1909 1910 Name1911 1912 1913 1914 1915 1916 18761917 18771918 18781919 18791920 18801921 18811922 18821923 18831924 18841925 18851926 18861927 18871928 18881929 18891930 18901931 18911932 18921933 18931934 18941935 18951936 18961937 18971938 18981939 18991940 19001941 19011942 19021943 19031944 19041945 19051946 19061947 19071948 19081949 19091950 19101951 19111952 19121953 19131954 19141955 19151956 19161957 19171958 19181959 19191960 19201961 19211962 19221963 19231964 19241965 19251966 19261967 19271968 19281969 19291970 19301971 19311972 19321973 19331974 19341975 19351976 19361977 19371978 19381979 19391980 19401981 19411982 19421983 19431984 19441985 19451986 19461987 19471988 19481989 19491990 19501991 19511992 19521993 19531994 19541995 19551996 19561997 19571998 19581999 19592000 19602001 19612002 19622003 19632004 19642005 19652006 19662007 19672008 19682009 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 A-Systems ABB Acbel Polytech Acopian Technical Active Power Active Semiconductor Advanced Analogic Tech Allgemeine Elektricitat Gesellschaft (AEG) AEG Power Solutions Alcatel-Lucent Allegro Microsystems Sprague Semiconductor Amelco Semiconductor American Microsystems American Power Conversion Analog Devices Apex Microtechnology APtronic Applied Plasma Physics Argus Technology Computer Products Asea ASEA Power Systems Astec Power Astrodyne Ault Aura Systems Automatic Electric Merged into General Telephone Balmar Basler Electric Company Bear Power Supplies Beckman Instruments BelFuse/BelPower Bell Labs Bellnix Benchmarq Microelectronics Bendix Best Power Technology Beta Dyne Bias Power Technology Bikor Boschert Inc. Bothhand Enterprise Bourns Brown Boveri & Cie Burle Technologies Burr Brown Bussmann Acquired by Max McGraw (later McGraw-Edison) C&D Technologies Calex Manufacturing Catalyst Semiconductor Cherokee International Cherry Semiconductor Chicony Electronics
ada cheng Page 7 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908Original1909 1910 Name1911 1912 1913 1914 1915 1916 18761917 18771918 18781919 18791920 18801921 18811922 18821923 18831924 18841925 18851926 18861927 18871928 18881929 18891930 18901931 18911932 18921933 18931934 18941935 18951936 18961937 18971938 18981939 18991940 19001941 19011942 19021943 19031944 19041945 19051946 19061947 19071948 19081949 19091950 19101951 19111952 19121953 19131954 19141955 19151956 19161957 19171958 19181959 19191960 19201961 19211962 19221963 19231964 19241965 19251966 19261967 19271968 19281969 19291970 19301971 19311972 19321973 19331974 19341975 19351976 19361977 19371978 19381979 19391980 19401981 19411982 19421983 19431984 19441985 19451986 19461987 19471988 19481989 19491990 19501991 19511992 19521993 19531994 19541995 19551996 19561997 19571998 19581999 19592000 19602001 19612002 19622003 19632004 19642005 19652006 19662007 19672008 19682009 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Patil Systems Clevite Transistor Products Cleveland Graphic Bronze; later Clevite Corp. Claude Lyons CogniPower GTI Power Systems Combined Technologies Communication Instruments Inc (CII Technologies) Communications & Power Industries Compagnie des Freins et Signaux Condor DC Power Supplies Controlled Power C&E Cooper Cooper-Hewitt Acquired by GE ELCO CPI International Communication & Power Industries Cree Cutter Electric & Manufacturing Changed name to I-T-E Circuit Breaker CyberPower Systems Dallas Semiconductor Delco Acquired by United Motors Delta Electronics Densei-Lambda di/dt Digitronics Diodes ETA Electronics Industry ETM Electromatic Tobersen Gear and Axle Edal Industries Edison General Electric Edison Light Company Elantec Semiconductor Electromanufactuas, S.A. de C.V. (EMSA) Electronic Transistors (ETCo) Electronic Specialists Electrowatt Eltek Energy Eltek Semiconductor Eltek Valere Emerson Network Power EMRISE Enerpro Ericsson EUPEC Exar Exide Electronics Group Exide Technologies Fairchild Semiconductor Falcon Electric Fayetteville Transformer Ferranti Ltd Ferranti Hammond Electric Light Ferranti, Thompson and Ince
ada cheng Page 8 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908Original1909 1910 Name1911 1912 1913 1914 1915 1916 18761917 18771918 18781919 18791920 18801921 18811922 18821923 18831924 18841925 18851926 18861927 18871928 18881929 18891930 18901931 18911932 18921933 18931934 18941935 18951936 18961937 18971938 18981939 18991940 19001941 19011942 19021943 19031944 19041945 19051946 19061947 19071948 19081949 19091950 19101951 19111952 19121953 19131954 19141955 19151956 19161957 19171958 19181959 19191960 19201961 19211962 19221963 19231964 19241965 19251966 19261967 19271968 19281969 19291970 19301971 19311972 19321973 19331974 19341975 19351976 19361977 19371978 19381979 19391980 19401981 19411982 19421983 19431984 19441985 19451986 19461987 19471988 19481989 19491990 19501991 19511992 19521993 19531994 19541995 19551996 19561997 19571998 19581999 19592000 19602001 19612002 19622003 19632004 19642005 19652006 19662007 19672008 19682009 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Freescale Semiconductor Friemann & Wolf Duisburg (FRIWO) Friemann & Wolf Gerätebau (FRIWO) FSP Group Furman Sound Gaia Converter Galaxy Power GEC Plessey Semiconductors General Atomics Energy Products General Electric General Instruments General Microelectronics General Semiconductor General Telephone and Electronics Merged with Automatic Electric General Transistor General Transistor Germanium Products Gould Storage Battery Hackbridge and Hewittic Electric Co., Ltd. Harris (Semiconductor) Electric Heating Apparatus Hind Rectifiers Ltd Hipro Electronics Hitachi Honeywell Huntkey Enterprise Group Hytek Microsystems Computing-Tabulating-Recording (C-T-R) Infineon Interdesign International Rectifier Intersil Invensys ITE Imperial IXYS iWatt Jenkins Electric Company JJ Electronic Kearney Kemet Kemet Laboratories Kepco Kyle Corporation Acquired by Line Material Lambda Electronics Leader Electronics Liebert Line Material Acquired by McGraw Electric Lineage Power Linear Technology Lite-On Technology Littlefuse Litton Engineering Laboratories Litton Industries Magnetek Marvell Technology
ada cheng Page 9 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908Original1909 1910 Name1911 1912 1913 1914 1915 1916 18761917 18771918 18781919 18791920 18801921 18811922 18821923 18831924 18841925 18851926 18861927 18871928 18881929 18891930 18901931 18911932 18921933 18931934 18941935 18951936 18961937 18971938 18981939 18991940 19001941 19011942 19021943 19031944 19041945 19051946 19061947 19071948 19081949 19091950 19101951 19111952 19121953 19131954 19141955 19151956 19161957 19171958 19181959 19191960 19201961 19211962 19221963 19231964 19241965 19251966 19261967 19271968 19281969 19291970 19301971 19311972 19321973 19331974 19341975 19351976 19361977 19371978 19381979 19391980 19401981 19411982 19421983 19431984 19441985 19451986 19461987 19471988 19481989 19491990 19501991 19511992 19521993 19531994 19541995 19551996 19561997 19571998 19581999 19592000 19602001 19612002 19622003 19632004 19642005 19652006 19662007 19672008 19682009 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Maxim Integrated Products Maxwell Laboratories McGraw Electric Merged with Pennsylvania Transformer McGraw-Edison Mean Well Enterprises Micrel Micro-Rel Microchip Technology Micro Linear MicroPlanet Technology Microsemiconductor Microsemiconductor Mitel Mitsubishi Electric Mobiletron Electronics Molectro Science Monolithic Power Systems Motorola MS Kennedy Murata Manufacturing Natel Engineering National Semiconductor National Union Radio Changed name to National Union Electric NEMIC (Nippon Electronic Memory Industry Company) NEMIC-Lambda NetPower Technologies NXP Semiconductor O2Micro Oki Power Tech OmniRel ON Semiconductor OnLine Power Optimum Power Conversion Opto 22 Oryx Technology Pacific Semiconductors Hughes Semiconductor Division Partner Technologies Pascall Electronics PECO II Pennsylvania Transformer Technology Phihong Philco Philco Ford Microelectronics Philips (Semiconductor) Photonis Picor (Vicor) Pioneer Magnetics Plessey Power-One Power Paragon Power Trends PowerBright PowerDsine Powerex
ada cheng Page 10 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908Original1909 1910 Name1911 1912 1913 1914 1915 1916 18761917 18771918 18781919 18791920 18801921 18811922 18821923 18831924 18841925 18851926 18861927 18871928 18881929 18891930 18901931 18911932 18921933 18931934 18941935 18951936 18961937 18971938 18981939 18991940 19001941 19011942 19021943 19031944 19041945 19051946 19061947 19071948 19081949 19091950 19101951 19111952 19121953 19131954 19141955 19151956 19161957 19171958 19181959 19191960 19201961 19211962 19221963 19231964 19241965 19251966 19261967 19271968 19281969 19291970 19301971 19311972 19321973 19331974 19341975 19351976 19361977 19371978 19381979 19391980 19401981 19411982 19421983 19431984 19441985 19451986 19461987 19471988 19481989 19491990 19501991 19511992 19521993 19531994 19541995 19551996 19561997 19571998 19581999 19592000 19602001 19612002 19622003 19632004 19642005 19652006 19662007 19672008 19682009 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Precision Monolithics Primarion Programmable Power Supply PULS Pulse Engineering Q.R.S. Music Qspeed Semiconductor Quantex Capital Radiation Radio Corporation of America (RCA) Radio Electronics & Television Manufacturers Association (RETMA) Radio Receptor Raytheon Renesas Technology REO Rheem Semiconductor RO Associates Rockwell Microelectronics RTE S. Z. de Ferranti Salcomp Samlex America Samsung Toho Sanken Electric SatCon Technology SB Electronics Schneider Electric Schrack Seletron Setec SGS-Fairchild SGS-Microelecttronica SGS-Thompson Shindengen Electric Manufacturing Shockley Transistor Siebe Siemens Signetics Silcon A/S Silicon General Semiconductors Silicon Link Siliconix Sipex G-L Electronics SL Power Electronics SmartPower Systems Société Generale Semiconduttori (SGS) Sola Electric Sola/Hevi-Duty Solomon Solomon Technologies Tokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company) Tokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company) SPD Technologies
ada cheng Page 11 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908Original1909 1910 Name1911 1912 1913 1914 1915 1916 18761917 18771918 18781919 18791920 18801921 18811922 18821923 18831924 18841925 18851926 18861927 18871928 18881929 18891930 18901931 18911932 18921933 18931934 18941935 18951936 18961937 18971938 18981939 18991940 19001941 19011942 19021943 19031944 19041945 19051946 19061947 19071948 19081949 19091950 19101951 19111952 19121953 19131954 19141955 19151956 19161957 19171958 19181959 19191960 19201961 19211962 19221963 19231964 19241965 19251966 19261967 19271968 19281969 19291970 19301971 19311972 19321973 19331974 19341975 19351976 19361977 19371978 19381979 19391980 19401981 19411982 19421983 19431984 19441985 19451986 19461987 19471988 19481989 19491990 19501991 19511992 19521993 19531994 19541995 19551996 19561997 19571998 19581999 19592000 19602001 19612002 19622003 19632004 19642005 19652006 19662007 19672008 19682009 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Sprague Electric Staco Energy Products Summit Microelectronics Sylvania Synqor Tamura TDI Power TDK Teccor Electronics Technitrol Telcom Semiconductor Teledyne Telefunken Electronic TEMIC Semiconductors Teridian Semiconductor (TSC) TESLAco Texas Instruments Thales Thomson Semiconducteurs Thomson-Houston Toshiba Tranformer and Electrical Company Ltd (TEC) Transistor Products Transitron TRW LSI Tsi Power Tyco Tyco Electronics US Digital Unison Technology Unitech Unitrode Valere Power Varian Associates Veeco Vicor Vincotech Virginia Transformer Vishay Volterra Semiconductor VPT WDC Technologies Western Electric Manufacturing Westinghouse Electric & Manufacturing Xandex Xantrex Technology Mitel Semiconductors Zeftronics Zetex Semiconductors Zilker Labs
ada cheng Page 12 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949Original1950 1951 Name1952 1953 1954 1955 1956 1957 18761958 18771959 18781960 18791961 18801962 18811963 18821964 18831965 18841966 18851967 18861968 18871969 18881970 18891971 18901972 18911973 18921974 18931975 18941976 18951977 18961978 18971979 18981980 18991981 19001982 19011983 19021984 19031985 19041986 19051987 19061988 19071989 19081990 19091991 19101992 19111993 19121994 19131995 19141996 19151997 19161998 19171999 19182000 19192001 19202002 19212003 19222004 19232005 19242006 19252007 19262008 19272009 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 A-Systems ABB Acbel Polytech Acopian Technical Active Power Active Semiconductor Advanced Analogic Tech Allgemeine Elektricitat Gesellschaft (AEG) Acquired by Diamler Benz AEG Power Solutions Alcatel-Lucent Allegro MicrosystemsSprague Semiconductor Acquired by Sanken Electric Amelco Semiconductor Renamed Teledyne Semiconductor Spun out of Teledyne as Telcom Semiconductor American Microsystems American Microsystems American Power Conversion Analog Devices Apex Microtechnology APtronic Applied Plasma Physics Argus Technology Computer Products Computer Products Renamed Artesyn Technologies Asea Merged with Brown Boveri & Cie to form ABB ASEA Power Systems Astec Power Astrodyne Ault Aura Systems Automatic Electric Merged into General Telephone Balmar Basler Electric Company Bear Power Supplies Beckman Instruments BelFuse/BelPower BelPower founded Bell Labs Spun out of AT&T as part of AT&T Technologies; later Lucent Technologies Bellnix Benchmarq Microelectronics Bendix Acquired by Allied Corp. Best Power Technology Acquired by General Signal Beta Dyne Bias Power Technology Bikor ? Acquired by Microsemi Acquired by Cherokee International Boschert Inc. Acquired by Computer Products (Artesyn) Bothhand Enterprise Bourns Brown Boveri & Cie Merged with ASEA to form ABB Burle Technologies Burr Brown Bussmann C&D Technologies Calex Manufacturing Catalyst Semiconductor Cherokee International Cherry Semiconductor Chicony Electronics
ada cheng Page 13 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949Original1950 1951 Name1952 1953 1954 1955 1956 1957 18761958 18771959 18781960 18791961 18801962 18811963 18821964 18831965 18841966 18851967 18861968 18871969 18881970 18891971 18901972 18911973 18921974 18931975 18941976 18951977 18961978 18971979 18981980 18991981 19001982 19011983 19021984 19031985 19041986 19051987 19061988 19071989 19081990 19091991 19101992 19111993 19121994 19131995 19141996 19151997 19161998 19171999 19182000 19192001 19202002 19212003 19222004 19232005 19242006 19252007 19262008 19272009 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Patil Systems Clevite Transistor Products Acquired by ITT Claude Lyons CogniPower GTI Power Systems Combined Technologies Acquired by RTE Communication Instruments Inc (CII Technologies) Communications & Power Industries Spun out of Varian Associates Compagnie des Freins et Signaux Acquired by Société de Mécanique et de Chaudronnerie de Pons (SMCP) Condor DC Power Supplies Acquired by SL Industries Controlled Power C&E Cooper Cooper-Hewitt ELCO CPI International Cree Cutter Electric & Manufacturing Merged with Imperial-Eastman to become ITE Imperial CyberPower Systems Dallas Semiconductor Delco Delta Electronics Densei-Lambda di/dt Digitronics Diodes ETA Electronics Industry ETM Electromatic Tobersen Gear and Axle Edal Industries Edison General Electric Edison Light Company Elantec Semiconductor Electromanufactuas, S.A. de C.V. (EMSA) Electronic Transistors (ETCo) Electronic Specialists Electrowatt Acquired by Siemens Eltek Energy Eltek Semiconductor Eltek Valere Emerson Network Power EMRISE Enerpro Ericsson EUPEC Merger of Siemens & AEG divisions Exar Exide Electronics Group Acquired by BTR Exide Technologies Fairchild Semiconductor Acquired by National SemiconductorSpun out of National Semiconductor Falcon Electric Fayetteville Transformer Ferranti Ltd Microelectronics soldBankrupt to plessey Ferranti Hammond Electric Light Ferranti, Thompson and Ince
ada cheng Page 14 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949Original1950 1951 Name1952 1953 1954 1955 1956 1957 18761958 18771959 18781960 18791961 18801962 18811963 18821964 18831965 18841966 18851967 18861968 18871969 18881970 18891971 18901972 18911973 18921974 18931975 18941976 18951977 18961978 18971979 18981980 18991981 19001982 19011983 19021984 19031985 19041986 19051987 19061988 19071989 19081990 19091991 19101992 19111993 19121994 19131995 19141996 19151997 19161998 19171999 19182000 19192001 19202002 19212003 19222004 19232005 19242006 19252007 19262008 19272009 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Freescale Semiconductor Friemann & Wolf Duisburg (FRIWO) Acquired by CEAG Friemann & Wolf Gerätebau (FRIWO) Changed name to FRIWO FSP Group Furman Sound Gaia Converter Galaxy Power GEC Plessey Semiconductors General Atomics Energy Products General Electric GE Solid State sold to Harris General Instruments Spun out microelectronics group as Microchip Technology General Microelectronics Acquired by Philco-Ford Microelectronics General Semiconductor General Telephone and ElectronicsMerged with Automatic Electric General Transistor Acquired by General Instruments General Transistor Germanium Products Gould Storage Battery Acquired by Japan Energy Hackbridge and Hewittic Electric Co., Ltd. Harris (Semiconductor) Electric Heating Apparatus Merged with Sola Electric to form Sola Hevi-Duty Hind Rectifiers Ltd Also known as Hirec Hipro Electronics ?? Not sure when founded Hitachi Honeywell Huntkey Enterprise Group Hytek Microsystems Computing-Tabulating-Recording (C-T-R) Infineon Interdesign Monochip brand Acquired by Ferranti International Rectifier Intersil Acquired by GE Invensys ITE Imperial Acquired by Gould IXYS iWatt Jenkins Electric Company JJ Electronic Kearney Acquired by Cooper Power Systems Kemet Kepco Kyle Corporation Lambda Electronics Acquired by Veeco Leader Electronics Liebert Acquired by Emerson Line Material Lineage Power Linear Technology Lite-On Technology Littlefuse Litton EngineeringLitton Laboratories Industries Magnetek Marvell Technology
ada cheng Page 15 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949Original1950 1951 Name1952 1953 1954 1955 1956 1957 18761958 18771959 18781960 18791961 18801962 18811963 18821964 18831965 18841966 18851967 18861968 18871969 18881970 18891971 18901972 18911973 18921974 18931975 18941976 18951977 18961978 18971979 18981980 18991981 19001982 19011983 19021984 19031985 19041986 19051987 19061988 19071989 19081990 19091991 19101992 19111993 19121994 19131995 19141996 19151997 19161998 19171999 19182000 19192001 19202002 19212003 19222004 19232005 19242006 19252007 19262008 19272009 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Maxim Integrated Products Maxwell Laboratories McGraw ElectricMerged with Pennsylvania Transformer McGraw-Edison Mean Well Enterprises Micrel Micro-Rel Microchip Technology Spun out of General Instruments Micro Linear MicroPlanet Technology MicrosemiconductorMicrosemiconductor Changed name to Microsemi Mitel Acquired Siltex for semis start Mitsubishi Electric Mobiletron Electronics Molectro Science Monolithic Power Systems Motorola MS Kennedy Murata Manufacturing Natel Engineering National Semiconductor Spun out Fairchild Semiconductor National Union RadioChanged name to NationalMerged Union with Electric Eureka-Williams Acquired by Electrolux NEMIC (Nippon Electronic Memory Industry Company) NEMIC-Lambda NetPower Technologies NXP Semiconductor O2Micro Oki Power Tech OmniRel ON Semiconductor OnLine Power Optimum Power Conversion Opto 22 Oryx Technology Hughes SemiconductorPacific Semiconductors Division Partner Technologies Pascall Electronics Acquired by Intelek PECO II Pennsylvania Transformer Technology Phihong Philco Acquired by Ford Motor Company (now Visteon) Philco Ford Microelectronics Philips (Semiconductor) Photonis Picor (Vicor) Pioneer Magnetics Plessey Semis began Acquired by GEC & Siemens AG consortium Power-One Power Paragon Acquired by SPD Technologies Power Trends PowerBright PowerDsine Powerex
ada cheng Page 16 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949Original1950 1951 Name1952 1953 1954 1955 1956 1957 18761958 18771959 18781960 18791961 18801962 18811963 18821964 18831965 18841966 18851967 18861968 18871969 18881970 18891971 18901972 18911973 18921974 18931975 18941976 18951977 18961978 18971979 18981980 18991981 19001982 19011983 19021984 19031985 19041986 19051987 19061988 19071989 19081990 19091991 19101992 19111993 19121994 19131995 19141996 19151997 19161998 19171999 19182000 19192001 19202002 19212003 19222004 19232005 19242006 19252007 19262008 19272009 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Precision Monolithics Acquired by Analog Devices Primarion Programmable Power Supply PULS Pulse Engineering Acquired by Bel Fuse Q.R.S. Music Qspeed Semiconductor Quantex Capital Beddis International Radiation Acquired by Harris Radio Corporation of America (RCA) Acquired by GE Radio Electronics & Television Manufacturers Association (RETMA) Radio Receptor Acquired by General Instruments Raytheon Renesas Technology REO Rheem Semiconductor Acquired by Raytheon RO Associates Rockwell Microelectronics RTE Acquired by Cooper S. Z. de Ferranti Salcomp Acquired by Nokia Samlex America Samsung Toho Sanken Electric SatCon Technology SB Electronics Schneider Electric Schrack Acquired by Siemens (Electromechanical Components) Seletron Setec SGS-Fairchild SGS-Microelecttronica SGS-Thompson Changed name to STMicroelectronics Shindengen Electric Manufacturing Shockley Transistor Siebe Siemens Signetics Acquired by Philips Silcon A/S Silicon General Semiconductors Acquired by SymmetriCon Silicon Link Siliconix Acquired by Vishay Sipex G-L Electronics Went public as G-L IndustriesChanged name to SGL Industries Renamed SL Industries SL Power Electronics SmartPower Systems Société Generale Semiconduttori (SGS) Sola Electric Acquired by Basic Products Sola/Hevi-Duty Solomon Solomon Technologies Tokyo Tsushin KogyoTokyo Tsushin(Tokyo Telecommunications Kogyo (Tokyo Telecommunications Engineering Company) Engineering Company) SPD Technologies
ada cheng Page 17 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949Original1950 1951 Name1952 1953 1954 1955 1956 1957 18761958 18771959 18781960 18791961 18801962 18811963 18821964 18831965 18841966 18851967 18861968 18871969 18881970 18891971 18901972 18911973 18921974 18931975 18941976 18951977 18961978 18971979 18981980 18991981 19001982 19011983 19021984 19031985 19041986 19051987 19061988 19071989 19081990 19091991 19101992 19111993 19121994 19131995 19141996 19151997 19161998 19171999 19182000 19192001 19202002 19212003 19222004 19232005 19242006 19252007 19262008 19272009 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Sprague Electric Acquired by Vishay Staco Energy Products Summit Microelectronics Sylvania Merged with General Telephone Synqor Tamura TDI Power TDK Teccor Electronics Technitrol Telcom Semiconductor Teledyne Telefunken Electronic TEMIC Semiconductors Teridian Semiconductor (TSC) TESLAco Texas Instruments Thales Thomson Semiconducteurs Merged with SGS Microelectronica to form SGS-Thompson Thomson-Houston Toshiba Tranformer and Electrical Company Ltd (TEC) Transistor Products Transitron TRW LSI Acquired by Raytheon Semiconductors Tsi Power Tyco Tyco Electronics US Digital Unison Technology ?? Unitech ?? Acquired by Siebe Unitrode Valere Power Varian Associates Veeco Acquired by Unitech Vicor Vincotech Virginia Transformer Vishay Volterra Semiconductor VPT WDC Technologies Western Electric Manufacturing Lucent Technologies Westinghouse Electric & Manufacturing Xandex Xantrex Technology Mitel Semiconductors Zeftronics Zetex Semiconductors Zilker Labs
ada cheng Page 18 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990Original1991 1992 Name1993 1994 1995 1996 1997 1998 18761999 18772000 18782001 18792002 18802003 18812004 18822005 18832006 18842007 18852008 18862009Most1887 1888Recent1889 Name1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 A-Systems ABB Acbel Polytech Acopian Technical Active Power Active Semiconductor Advanced Analogic Tech Allgemeine Elektricitat Gesellschaft (AEG) AEG AEG Power Solutions Alcatel-Lucent Allegro Microsystems Amelco SemiconductorSpun out of Teledyne as Telcom Semiconductor American Microsystems Renamed AMI Semiconductor AcquiredAMI Semiconductor by On Semiconductor American Power Conversion Acquired by Schneider Electric Analog Devices Apex Microtechnology Acquired by Cirrus Logic APtronic Applied Plasma Physics Argus Technology Computer Products Renamed Artesyn Technologies Acquired by ArtsynEmerson Technologies MergedAsea with Brown Boveri & Cie to form ABB ASEA Power Systems Astec Power Acquired by Emerson Astrodyne Ault Acquired by SL Industries Aura Systems Automatic Electric Balmar Basler Electric Company Bear Power Supplies Beckman Instruments BelFuse/BelPower Spun out of AT&T as partBell of Labs AT&T Technologies; later Lucent Technologies Lucent Technologies Bellnix Benchmarq Microelectronics Acquired by Unitrode Bendix Best Power TechnologyAcquired by General Signal Beta Dyne Bias Power Technology Bikor Acquired by Cherokee International Boschert Inc. Bothhand Enterprise Bourns Brown Boveri & Cie Burle Technologies Acquired by Photonis Burr Brown Acquired by Texas Instruments Bussmann McGraw-Edison C&D Technologies Calex Manufacturing Catalyst Semiconductor Acquired by On Semiconductor Cherokee International Acquired by Lineage Power Cherry Semiconductor Acquired by On Semiconductor Chicony Electronics
ada cheng Page 19 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990Original1991 1992 Name1993 1994 1995 1996 1997 1998 18761999 18772000 18782001 18792002 18802003 18812004 18822005 18832006 18842007 18852008 18862009Most1887 1888Recent1889 Name1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Patil Systems Cirrus Logic Clevite Transistor Products Claude Lyons CogniPower GTI Power Systems AcquiredColdwatt by Flextronics Combined Technologies Communication Instruments Inc (CII Technologies)Acquired by Tyco Communications Spun& Power out Industriesof Varian Associates Compagnie des Freins et Signaux Condor DCAcquired Power bySupplies SL Industries Controlled Power C&E Cooper Cooper Industries Cooper-Hewitt ELCO Cosel CPI International Cree Cutter Electric & Manufacturing CyberPower Systems Dallas Semiconductor Acquired by Maxim Integrated Products Delco Delta Electronics Densei-Lambda Acquired by TDK di/dt Acquired by Power-One Digitronics Diodes ETA Electronics Industry ETM Electromatic Tobersen Gear and Axle Eaton Edal Industries Edison General Electric Edison Light Company Elantec Semiconductor Acquired by Intersil Electromanufactuas, S.A. de C.V. (EMSA)Acquired by Cooper Power Systems Electronic Transistors (ETCo) Electronic Specialists Electrowatt Acquired by Siemens Eltek Energy Merged with Valere Power Eltek Semiconductor Eltek Valere Emerson Network Power EMRISE Enerpro Ericsson EUPEC Acquired by Infineon Exar Exide Electronics Group Acquired by BTR Exide Technologies Fairchild Semiconductor Spun out of National Semiconductor Falcon Electric Fayetteville Transformer Ferranti Ltd Ferranti Hammond Electric Light Ferranti, Thompson and Ince
ada cheng Page 20 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990Original1991 1992 Name1993 1994 1995 1996 1997 1998 18761999 18772000 18782001 18792002 18802003 18812004 18822005 18832006 18842007 18852008 18862009Most1887 1888Recent1889 Name1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Freescale Semiconductor Friemann & Wolf Duisburg (FRIWO) Friemann & Wolf GerätebauChanged (FRIWO) name to FRIWO FRIWO FSP Group Furman Sound Acquired by Panamax Gaia Converter Galaxy Power Acquired by BelPower GEC Plessey Semiconductors Acquired by Mitel (eventually Zarlink Semiconductors) General Atomics Energy Products General Electric SpunGeneral out microelectronics Instruments group as MicrochipAcquired Technology by Motorola General Microelectronics General Semiconductor Acquired by Vishay General Telephone and Electronics GTE General Transistor General Transistor Germanium Products Gould Storage Battery Hackbridge and Hewittic Electric Co., Ltd. Harris (Semiconductor) Spun out as Intersil Electric Heating ApparatusMerged with Sola Electric to form Sola Hevi-Duty Hevi-Duty Electric Hind Rectifiers Ltd Hipro Electronics Acquired by Chicony Electronics Hitachi Merged into Renesas Honeywell Huntkey Enterprise Group Hytek Microsystems Acquired by Natel Engineering Computing-Tabulating-Recording (C-T-R) IBM Infineon Interdesign International Rectifier Intersil Invensys ITE Imperial IXYS iWatt Jenkins Electric Company JJ Electronic Kearney Acquired by Cooper Power Systems Kemet Kepco Kyle Corporation Lambda Electronics Leader Electronics Liebert Line Material Lineage Power Linear Technology Lite-On Technology Acquired/sold by Vishay Littlefuse Litton Engineering Laboratories Acquired by Northrup GrummanLitton Industries Magnetek Marvell Technology
ada cheng Page 21 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990Original1991 1992 Name1993 1994 1995 1996 1997 1998 18761999 18772000 18782001 18792002 18802003 18812004 18822005 18832006 18842007 18852008 18862009Most1887 1888Recent1889 Name1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Maxim Integrated Products Acquired Dallas Semiconductor Maxwell Laboratories Maxwell Technologies McGraw Electric McGraw-Edison Mean Well Enterprises Micrel Micro-Rel Microchip Technology Micro Linear Acqired by Sirenza Microdevices MicroPlanet Technology Microsemiconductor Microsemi Mitel Mitsubishi Electric Mobiletron Electronics Molectro Science Monolithic Power Systems Motorola MS Kennedy Acquired by Anaren Murata Manufacturing Natel Engineering National Semiconductor Spun out Fairchild Semiconductor National Union Radio National Union Electric NEMIC (Nippon Electronic Memory Industry Company) NEMIC-Lambda Merged with Nippon Electric to form Densei NetPower Technologies NXP Semiconductor O2Micro Oki Power Tech OmniRel Acquired by International Rectifier ON Semiconductor OnLine Power Optimum Power Conversion Opto 22 Oryx Technology Pacific Semiconductors Partner Technologies Pascall Electronics Acquired by Intelek PECO II Pennsylvania Transformer Technology Phihong Philco Philco Ford Microelectronics Philips (Semiconductor) Photonis Picor (Vicor) Pioneer Magnetics AcquiredPlessey by GEC & Siemens AG consortium Power-One Power Paragon Acquired by SPD Technologies Power Trends Acquired by Texas Instruments PowerBright PowerDsine Powerex
ada cheng Page 22 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990Original1991 1992 Name1993 1994 1995 1996 1997 1998 18761999 18772000 18782001 18792002 18802003 18812004 18822005 18832006 18842007 18852008 18862009Most1887 1888Recent1889 Name1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Precision Monolithics Primarion Acquired by Infineon Programmable Power Supply PULS Pulse EngineeringAcquired by Bel Fuse Pulse Q.R.S. Music Qspeed Semiconductor QuantexBeddis Capital International Radiation Radio Corporation of America (RCA) Radio Electronics & Television Manufacturers Association (RETMA) Electronics Industries Alliance (EIA) Radio Receptor Raytheon Renesas Technology REO Rheem Semiconductor RO Associates Acquired by EMRISE Rockwell Microelectronics Spun out as Conexant Conexant RTE S. Z. de Ferranti Salcomp Samlex America Samsung Toho Sanken Electric Sanken Electric SatCon Technology SB Electronics Schneider Electric Schrack Acquired by Siemens (Electromechanical Components) Seletron Setec SGS-Fairchild SGS-Microelecttronica SGS-Thompson Changed name to STMicroelectronics STMicroelectronics Shindengen Electric Manufacturing Shockley Transistor Siebe Merged with BTR to form Invensys Siemens Signetics Silcon A/S Silicon GeneralAcquired Semiconductors by SymmetriCon Silicon Link Siliconix Sipex G-L Electronics SL Industries SL Power Electronics SmartPower Systems Société Generale Semiconduttori (SGS) Sola Electric Sola/Hevi-Duty Solomon Solomon Technologies Tokyo Tsushin Kogyo (Tokyo Telecommunications Engineering Company) Sony SPD Technologies
ada cheng Page 23 6/13/11 Power Electronics Corporate Genealogy
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990Original1991 1992 Name1993 1994 1995 1996 1997 1998 18761999 18772000 18782001 18792002 18802003 18812004 18822005 18832006 18842007 18852008 18862009Most1887 1888Recent1889 Name1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Sprague Electric Staco Energy Products Summit Microelectronics Sylvania Synqor Tamura TDI Power TDK Teccor Electronics Technitrol Telcom Semiconductor Acquired by Microchip Teledyne Telefunken Electronic TEMIC Semiconductors Acquired by Vishay Teridian Semiconductor (TSC) TESLAco Texas Instruments Thales Merged withThomson SGS Microelectronica Semiconducteurs to form SGS-Thompson Thomson-Houston Toshiba Tranformer and Electrical Company Ltd (TEC) Transistor Products Transitron TRW LSIAcquired by Raytheon Semiconductors Tsi Power Tyco Tyco Electronics US Digital Unison Technology Unitech Acquired by Siebe Unitrode Acquired by Texas Instruments Valere Power Merged with Eltek Energy Varian Associates Veeco Vicor Vincotech Part of Lineage Holdings Virginia Transformer Vishay Volterra Semiconductor VPT Acquired by HEICO Corp WDC Technologies Western Electric Manufacturing Westinghouse Electric & Manufacturing Xandex Xantrex Technology Acquired by Schneider Electric (inverters) and Ametek (programmable power unit). Mitel Semiconductors Zarlink Semiconductors Zeftronics Zetex Semiconductors Acquired by Diodes Zilker Labs Acquired by Intersil
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