Hered Periodically to Discuss the Possibility and Future Form of the Personal Computer
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Lee Felsenstein 2460 Park Blvd. #1 Palo Alto, CA 94306-1917 (650)814-0427• [email protected] • fax (650)322-2881 Technical History Training and Education At age 12 I was given an uncompleted correspondence course for radio and TV repair (DeVry Technical Institute). This, along with earlier radio experimentation, was my introduction to electronics. I learned it well enough to go into business briefly at age 17 doing repair. Product of Philadelphia public schools 1950 – 1963. Graduated from the elite Central High School (219th class) Jan. 1963. Enrolled in College of Engineering, University of California, Berkeley Sept. 1963 in Electrical Engineering (General curriculum). Joined Cooperative Work-Study Program in Engineering 1964. After a hiatus 1968 – 1971 returned to Berkeley to complete BSEE degree. Graduated June 1972. Employment Demonstrator, Franklin Institute Science Museum, Philadelphia 1963. Ran “Progress of Computation” exhibit featuring UNIVAC-1 computer operating behind glass. Co-operative Work-Study Program, College of Engineering, UC Berkeley, 1964 - Engineering Aide, NASA Flight Research Center, Edwards CA. Performed component vibration tests. Designed simple analog transistor circuits to aid in testing. 1965 - Lab Helper, School of Optometry, UC Berkeley. Designed, built and debugged circuitry used in physiological optics research. Designed vacuum-tube operational amplifiers and pulse-shaping circuitry. Co-inventor of US Pat. 3,453,437 “Automatic Photoelectric Keratometer”. 1966 - Technician, Berkeley Instruments, Berkeley, CA. Performed temperature tests on electronic subassemblies. Designed and built transistor pulse-timing circuits to alert operator to out-of-spec operation. Volt Technical Services – summer 1967. Contract employment Draftsman, Raytheon Edex, Mountain View CA Circuit analyst – Consultronics, Mountain View, CA. Analyzed radar circuitry for failure modes. Junior Engineer, Ampex Inc., Redwood City, CA 1968 – 1971 Designed analog transistor circuitry for high-speed tape duplicators. Designed Lee Felsenstein resume 1/7 1/14/2013 high-power, high-purity bias oscillator, oversaw transfer to production, performed field service and analysis of operation. Maintained design of computer interface section of large-scale, minicomputer- controlled audio/visual random-access information retrieval system. Designed operational amplifier filter circuits, TTL logic, debugged and documented designs. Wrote assembly- language test programs for DG Nova minicomputer. Engineer, Resource One, Inc. San Francisco CA 1972 – 1973. Assisted in installation and maintenance of SDS-940 mainframe computer. Designed and constructed modem line interface unit, designed and constructed self-adjusting modem circuitry, repaired Teletypes, performed mechanical design for disc channel interface, constructed Teletype sound enclosure. Worked with discrete transistor electronics, IC active filter and phase- locked loop circuits. During this time I became a member of the personal computer hobbyist subculture, which gathered periodically to discuss the possibility and future form of the personal computer. Volt Technical Services, 1974. Worked at Iomec, Inc., Santa Clara CA. Designed stand- alone tape cartridge data storage device and constructed a prototype. Self-employed dba LGC Engineering 1974 – 1979. Performed contract engineering including: Design and prototype of a pegboard-to-serial data converter for display of graphs on terminal. TTL, UART and RS-232 circuitry. Debug circuitry for a daisy-wheel printer interface. TTL, UART and NMOS (4004) CPU technologies. Develop and self-publish a specification for modular personal computer (“Tom Swift Terminal”). Design of the first alphanumeric video display for personal computers (VDM-1, for Processor Technology Corp., 1975). LS-TTL, NMOS static memory, RS-170 video output analog circuitry. Design of the first computer incorporating integrated video, communication, tape storage and S-100 bus expansion (Sol-20, for Processor Technology Corp., 1976). Interim engineering manager for Processor Technology Corp. 1976- 1977. Supervised development and documentation activities. Design and construct a large-scale digital video-processing system (for Etra Technology Research Associates, 1978 – 1979). ECL, STTL, high-speed data file RAM, delay-line clock compensation. President, Golemics, Inc. 1979 – 1981. Managed and performed design for a contract electronic product development company. Designed the first portable computer for mass production (Osborne-1, for Osborne Computer Corp., 1980 – 81). LS-TTL, NMOS peripheral chips, NMOS dynamic RAM, product integration. Founding board member of Osborne Computer Corp. Provided engineering services to Osborne Computer. Lee Felsenstein resume 2/7 1/14/2013 VP Engineering, Osborne Computer Corporation, 1981 – 1983. Helped put Osborne-1 portable computer into production. Helped solve production and quality-control problems. Investigated technologies for future products. Performed architectural design of follow-on product (Osborne Executive). Negotiated with five Japanese companies to develop approaches to laptop computer. Promoted to R&D Fellow 1982. Osborne Computer Corp. entered Chapter 11 bankruptcy in Sept. 1983. President, Golemics, Inc. 1983 – 1992. Managed and performed electronic design for an electronic product development company. Between its founding and 1992 Golemics performed on 50 projects, including: Complete PC-compatible portable computer, including multi-format video display, hard disk controller, and ROM-BIOS firmware. Assembled a team of six in- house and ten external engineers to carry out the development.This design was fully deterministic and designed for implementation through VLSI. Technologies included ALS TTL, static and dynamic RAM, hybrid STTL modules, system integration. Ten prototypes were built and delivered to client Oki Electric Co., Ltd., 1983 – 1984. Designed and built plasma panel controller used to demonstrate full PC-DOS compatibility of OKI plasma panel display to Compaq Computer Company, resulting in design win for OKI in Compaq designs. For Oki Electric CO. Ltd., 1984. 8-channel RS-232 Multibus interfaces and token-ring Multibus interface for Britton-Lee database engine (for Britton-Lee Inc., 1985 – 1986). “Workstation on an ISA board”, using shared memory to store a 300 dpi image, display it at 150 dpi on a vertical display, and printing the bitmap on a Canon laser printer. For Upstart Corp., (a startup of which I was a founder) 1986 – 1987. Demonstration module for TI speech synthesizer chip. Included housing design, mechanical design, and PCB design. For Berkeley Speech Technology, 1990. Designed the first demonstrated wearable computer, using head-mount virtual display and incorporating a CD-ROM. For Reddy Information Systems, NY, 1990 – 1991. Implemented a version of previously patented force-operated cursor controller (US Pat. No. 5,012,231). While demonstrated at the 1991 CD-ROM Show and Exposition, the device was not taken into production. Altera MAX1000 FPGA custom display controller, CD-ROM, switching power regulator, mechanically swept LED virtual image display. Member of the Research Staff, Interval Research Corp., Palo Alto CA, 1992 – 2000. Tools used: ORCAD Capture, PADS-PCB layout, Tektronix DSO, First researcher hired at Paul Allen’s R&D laboratory. Participated in planning for Lee Felsenstein resume 3/7 1/14/2013 building layout, hiring of researchers, formation of Intellectual Property Committee. Managed project to develop prototypes for researchers. Participated in the design of: Portable multi-channel high-precision data logger with networking capability. Game board having 2D pattern of contacts allowing an electrical circuit to be maintained at all times to a sliding counter. Real-time video processing system for edge detection. FPGA, PLD sync generator, CMOS line buffer memories. Breath-sensitive 2D sensor for an art project, subject of patent. Used discrete transistors as low-cost temperature sensors. “Pocket Watch” video display for wearable camcorders. Developed analog polarity-equalizing circuit. 500-watt servo amplifier using high-power operational amplifiers. Burnout problems were solved by designing a variable-transconductance amplifier and tuning it to match the transmission-line characteristic impedance of the motor cables. Crystal-locked motor controller for rotary camera positioner. Served as engineering liaison to an Interval spinoff company. Traveled to England to transfer technology of magnetic 2D position and identity sensor. Advised and assisted spinoff company Managed a prototype construction run which allowed them to show product at the Toy Fair reliably. Interval Research was closed by Paul Allen in April 2000. President, Golemics, Inc. 2000 – 2001 Designed and built an image capture system utilizing electrostatic pickup on a large grid array of electrodes, receiving 100 KHz signal by homodyne detection. Wrote a complex machine-language program for the PIC-based controller. Designed all printed circuits and debugged. For Aura Imaging, Redwood City 2000 – 2001. CMOS logic and switches, PIC16C7X embedded CPUs, phase locked loops, quadrature homodyne signal detection. Sr. Electrical Engineer, Pemstar Pacific Consultants, San Jose CA 95012. 2001 – 2005 Tools used – ORCAD Capture, ORCAD Layout, Microsoft Project, Microsoft Office, Tektronix DSO, H-P spectrum analyzer, DVM. Helped bring up Helmet Interface Adapter (HIA) for “Land Warrior” wearable military information