Electronics-1979-11-22.Pdf
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NOVEMBER 22, 1979 EIA FORECASTS PENTAGON COMPUTER PUSH/88 C-MOS microprocessor matches n-channel performance/ 111 D-a converter provides bit-slice processor with fast analog output/ 140 FOUR DOLLARStA McGRAW-HILL PUBLICATION 1111 Ellec ron I 4 8 .. ••• % Coding wipes out errors in microprocessor systems ( Over the last decade, Models 3006, 3299 and 3386 Trimpot® trimming • potentiometers have set the standards for cermet trimmers. And, because these dependable models offer the best performance per dollar around, they'll be standards for a long time to corne. All models are sealed for board processing. Boums exclusive Swage-BondTmtermination process virtually eliminates pin termination failure. Cermet elements offer essentially infinite resolution. Multi-fingered wrap-around wiper design reduces contact resistance variation and open circuit problems. Here are the specs: II 3006 3299 3386 d. Res. Range 10 Ohms to 10 Ohms to 10 Ohms to 2Megohms 5Megonms 2Megohms Res. Tolerance 10% 10% 10% Power Rating .75 W @ 70°C .5 W @ 70°C .5 W @85 °C Tempco 100 ppm/°C 100 ppm/°C 100 ppm/°C CRV 3% 3% 1% Adjustment 15 turns 25 turns Single-turn (top or side (top or side adj.) adj.) Size 3/4" rect. 3/8" square 3/8" square Pin Patterns 3styles 5styles 14 styles me-proven trimmers, backed by the Boums reputation for adership, performance and quality at cost-effective prices. Call write today for your new 94-page TR-1 trimmer catalog. Or, see e EEM directory, Volume 2, pages 3726, 3736 and 3746. Timely Offer: Write to Trimmer Application Engineering on your company letterhead. While supply lasts, we'll send you a free trimmer design aid kit detailing all specifications and drawings. TRIMPOt DIVISION, BOURNS, INC., 1200 Columbia Avenue, Riverside, CA 92507. Phone: 714 781-5320. TWX: 910 332-1252. European Headquarters: Boums AG, Zugerstrasse 74 6340 Baar, Switzerland. Phone: 042 33 33 33. Telex: 78722. For Immediate Application—Circle 120 For Future Application—Circle 220 YOUR CHIPS COME IN MITEL'S 'CHIP+ CHIP' TOUCH-TONE® RECEIVER. At Mitel Semiconductor, we practice one-upmanchip. The MT8860 DTMF Decoder and the MT8865 Band Split Filter are the lowest cost 100 per cent semiconductor solutions to acomplete DTMF receiver available. Smaller than conventional receivers, this chip-set features separate filter and decoder components with applications ranging from switching systems to mobile radio. FEATURES • 12 mW power dissipation. • Single supply voltage from 4.5 to 13 volts. • 14 dB signal to noise ratio. • Exceptionally low talk-off rate (less than three hits on Mitel test tape). • 30 dB dynamic range. • 30 dB precise dial tone rejection. Now available for immediate delivery. LAUNCHING THE CHIPS OF TOMORROW. MITEL SEMICONDUCTOR United States: 1735 Jefferson Davis Highway, Suite 1009, Arlington, Virginia, U.S.A. 22202. Telephone 17031 243-1600 1223 Westchester Pike, Havertown, Pennsylvania, U.S.A. 19083. Telephone 12151449-5556. 2321 Morena Blvd., Suite M, San Diego, California, U.S.A. 92110. Telephone 17141 276-3421. Canada: P.O. Box 13089, Kanata, Ottawa, Ontario, Canada K2K 1X3. Telephone 16131 592-2122, Telex: 053-4596, TVVX: 610-562-8529. 18 Airport Blvd., Bromont, Quebec, Canada JOE 1LO. Telephone 15141 534-2321, Telex: 05-267474. Europe: Hamilton Road, Slough, Berkshire, England SL1 4C1Y. Telephone 0753-36137, 0753-36138, Telex: 847730 Fredericiagade 16, Suite 309, 1310 Copenhagen K, Denmark. Telephone 1011 119302, Telex: 27246 Asia: Park-In Commercial Centre, Suite 1423, 56 Dundas Street, Mong Kok, Kowloon, Hong Kong. Telephone 3-318256, Telex: 64235. Copyright 1979 Mitel Corporation Circle 1 on reader service card Registered Trademark of AT&T eri We and Intel have something in common- responsiveness to customer needs? I.Gary Bard, President, Aydin Controls. screen can be addressed individually— and very rapidly. That's opened up all sorts of feature and capability possibilities. "With Inters 1ntellec® development system and ICE86TM in-circuit emulation, we've been able to take advantage of the 8086 by quickly developing sophisticated proprietary software. I. Gary Bard: "We've carved out adominant position "And the Intellec system helps us be responsive in the video graphics marketplace by listening to the needs of our large OEM customers by customiz- carefully to our customers and giving them the features ing software. In amatter of days, we can develop and capabilities they need. To do that, though, unique capabilities for acustomer, store the program we need to take advantage of the leading edge of in PROM and deliver it to the field. microcomputer technology. "In fact, that's what Intel microcomputers and "That's where Intel comes in. They've consistently software development tools are all about: quicker delivered the 'leading edge' products. More important, solutions more economically." they understand that our success depends upon Intel microcomputer products and ahigh level of proprietary value-added. So in development systems can make the addition to hardware, Intel has always given us competitive difference for your company. the software development tools we need to be For more information, contact your responsive to our customers' needs. local Intel sales office or distributor, or "Take the Intel®8086, their 16-bit micro - write Intel Corporation, Literature Dept., computer, for example. It's enabled us to 3065 Bowers Ave., Santa Clara, CA technologically leapfrog the competi- 95051. Telephone (408) 987-6475. tion. The raster graphics state-of-the- art is limited by monitor technology to amillion elements. Coincidentally— unnnotaannnégamo, noocorpouounu or not —the 8086 with its million byte r,nnannomannu addressability means each dot on the InterskadeeDevdopmentSystem Circle #2 for information intel delivers. Electronics rvue The International Magazine of Electronics Technology Vol. 52, No. 24 •November 22, 1979 39 Electronics Review Highlights IEDM: All-silicon devices will match SOS in performance, 39 MEMORIES: Intel to disclose 16-K static secrets, 40 Cover: Hamming for microprocessors, 103 SOLID STATE: Silicon nitride seals ion implants on GaAs, 41 Circuit specifics show how the pervasive IEEE: New president seeks belated board support, 41 algorithm for error detection and correction COMPONENTS: Transducer sports an SOS diaphragm, 42 AEROSPACE: Do cosmic rays spell death to VLSI in space? 44 worked out by Richard Hamming is being DISPLAYS: 40-character LCD made like an integrated circuit, 46 used in 8- and 16-bit systems PACKAGING & PRODUCTION: UV system goes submicrometer, 46 Cover is by Art Director Fred Sklenar. COMMERCIAL: IC content of voice-stress analyzers is mystery, 48 MILITARY: Tropospheric radio uses digital circuitry, 50 Vertical-MOS gains in power market, 85 NEWS BRIEFS: 50 V-MOS field-effect transistors, with their 63 Electronics International inherently high gain and switching-speed GREAT BRITAIN: Ultrasonics yields simple fuel injector, 67 characteristics, are threatening to take the WEST GERMANY: PCM audio proposal would ease disk manufacture, 68 FRANCE: Superfast signal analyzers use analog memories, 70 discrete power transistor market away from AROUND THE WORLD: 72 bipolar devices. 85 Probing the News COMPONENTS: V-MOS outmuscles bipolar for power, 85 Fast C-MOS process challenges n-MOS, 111 MILITARY: EIA sees good news at Pentagon, 88 A complementary-MOS process using two WORD PROCESSING: IBM 5520 widens office beachhead, 92 levels of polysilicon interconnections brings CONSUMER: Chip pinch causes Christmas game shortage, 96 n-MOS speed and C-MOS power frugality MEETINGS: Midcon breaks attendance record, 98 together in a microcomputer family. 103 Technical Articles COMMUNICATIONS: Applying Hamming code to microprocessors, 103 A-d conversion: catching the drift, 123 SOLID STATE: PC-MOS microcomputer attains n-MOS speed, 111 Digital and analog techniques are combined DESIGNER'S CASEBOOK: LC network adapts PLL for overtones, 118 Tone detector sharpens digital filter's response, 118 to combat temperature-induced linearity D-a converter simplifies hyperbolic clock, 121 and offset errors in the analog-to-digital DATA ACQUISITION: Correcting errors digitally in data acquisition, 123 converters of data acquisition systems — MICROPROCESSORS: Adding flexibility to TV control system, 132 inexpensively. COMPONENTS: Fast d-a unit mates with bit slices, 140 ENGINEER'S NOTEBOOK: Three-chip scale zeroes tare weight, 146 .. and in the next issue RAM diagnostic program performs nondestructive check, 148 Electronics industry executives look at the 153 New Products year ahead .. an overview of this year's IN THE SPOTLIGHT: Single-board computer is fast, powerful, 153 Scientific computer costs $16,500, 156 International Electron Devices Meet- INSTRUMENTS: Analyzer covers 21 GHz, and more, 160 ing .. a scaled-down process for bipolar SEMICONDUCTORS: 32-K E-PROM starts as 64-K, 168 memories. MICROCOMPUTERS & SYSTEMS: LSI-11 memory has two ports, 176 DATA ACQUISITION: Converter accepts BCD inputs, 184 MATERIALS: 203 Departments Publisher's letter, 4 Readers' comments, 6 News update, 8 People, 14 Editorial, 24 Meetings, 26 Electronics newsletter, 33 Washington newsletter, 55 Washington commentary, 56 International newsletter, 63 Engineer's newsletter, 150 Products newsletter, 197 New literature, 205 Services Employment opportunities, 210 Reprints available, 233 Reader service card, 237 Electronics/November 22, 1979 3 Electronics Publisher's letter Like more than a few of today's During "a streak of unemploy- EDITOR-IN-CHIEF: