EW+WW exclusivea0% off virtual instruments ELECTRONICS Denmark DKr. 65.00 Germany DM 15.00 Greece Dra.950 Holland Dfl. 14 Italy L. 8000 IR £3.30 Singapore 5S12.60 WORLD Spain Pts. 750 USA $4.94 A REED BUSINESS PUBLICATION +WIRELESS WORLD SOR DISTRIBUTION September 1995£2.10 New audio power solution MicroCap 5 reviewed Nulling coil interaction Analogue filters Alternative balanced amplifier Analysing fm noise 20% discountumaudio analyser UK launch MICROMASTER LV PROGRAMMER by marl manufActurers111(10611g AMD MICROCHIP ATMEL from only £495 THE ONLY PROGRAMMERS WITH TRUE 3 VOLT SUPPORT The Only True 3V and 5V FEATURES Widest ever device support Universal Programmers including EPROMs, EEPROMs, Flash, Serial PROMs, BPROMs, ce Technology's universal programming solutions are designed with the future in mind. In PALs, MACH, MAX, MAPL, PEELs, addition totheir comprehensive, ever widening device support, they arethe only EPLDs, Microcontrollers etc. programmers ready to correctly programme and verify 3 volt devices NOW. Operating from battery or mains power, they are flexible enough for any programming needs. Correct programming and verification of 3 volt devices. The Speedmaster LV and Micromaster LV have been rigorously tested and approved by some of the most well known names in semiconductor manufacturing today, something that very few Approved by major manufacturers. programmers can claim, especially at this price level! High speed: programmes and Not only that, we give free software upgrades so you can dial up our bulletin board any time for verifies National 27C512 in under the very latest in device support. II seconds. Speedmaster LV and Micromaster LV - they're everything you'll need for programming, chip Full range of adaptors availab e for testing and ROM emulation, now and in the future. up to 84 pins. Speedmaster LV £495 8 bit Emulator card £125 Connects directly to parallel port - no PC cards needed. Programmes 3 and 5V devices including memory, Expansion card for Speedmaster LV/ Micromaster programmable logic and 8748/51 series micros. LV containing 8 bit wide ROM/ RAM emulator. Built in chiptester for 7400, 4000, Complete withparallelport cable, software,Emulates 3V and 5V devices. Includes cable and DRAM, SRAM. re -charger and documentation. software. Configuration:I 28K x 8 expandable to Lightweight and mains or battery 51 2K by 8. operation. 16 bit Emulator card £195 FREE software device suppor: Micromaster LV 1625 upgrades via bulletin board. As above plus support for over 130 differentAs above but containing 16 bit ROM/RAM Next day delivery. Microcontrollers, without adaptors, including PICs,emulator. Configuration: 128K by 16, 256K by 8, 2 89C5 I, 68HC705/7 II, ST6, Z8 etc. by 128K 8, expandable to 5 12K by I6/1024K by 8. For a copy of our catalogue gibingfull details of G Y 0 ICE Technology Ltd. Penistone Court, Station Buildings, programmers, emulators. erasers. adaptors and logic 0 Penistone, South Yorkshire, UK S30 6HG analysers call. fax or dial the BS numbers belt to Tel: +44 (0)1226 767404 Fax: +44 (0)1226 370434 AMERICAN BBS: +44 (0)1226 761181 (14400,8N1) MinnaWSA EXPRESS 331 CIRCLE NO. WI ON REPLY CARD it CONTENTS 728 DESIGNING WITH A 783 PREDICTING FM SINGLE RAIL NOISE EFFECTS Design expert Walt Jung presents Everyone knows that noise affects analogue solutions for systems where integrity in fm data communications - only a single, low -voltage supply is but by how much? available. 787 ASP AND FILTERING 736 ADD SENSES TO In the Design Brief series, Ian Hickman looks at the benefits of using analogue YOUR PC signal processing in filter applications. By plugging a small module into your LPT port, you can log data, count frequency or even analyse spectra. REGULARS 746 A NEW SLANT ON 715 COMMENT AN OLD ANGLE The industry we never had. Cover - Hashim Akib Irving Gottleib looks at an early solution to the problem of adjacent coil interaction. 716 NEWS Road toll trials, pcb shortage, new gas 749 A NEW sensor, surround sound from two speakers. BALANCED VIEW Steve Winder discusses a new approach 721 RESEARCH NOTES to twisted -pair coupling. Flying robot success, magnetic train breakthrough, live on the net, remote Development of a high-speed, 751 SQUARE LAW RULES IN surgery. magnetically powered train that does not levitate, is inexpensive, and can AUDIO POWER 740 APPLICATIONS run on already -laid track - page 721. The 'difference of two squares' concept Video -speed a -to -d conversion with no offers significant linearity benefits when s&h, RS232 with 1µA standby, power applied to audio power, as Ian Hegglun mosfet driving. explains. 770 LETTERS 758 RECORDING ON Arguments for terrestrial digital tv, EMI on planes, dynamos and audio design DEMAND debate. An electronic aid for reducing the tedium of note taking, designed by Francois 792 CIRCUIT IDEAS Steenkeste Remote resistance measurement 30W power amplifier, Milliohm meter, Special reader HF vco, Isolated thermometer amplifier, discount of 30% 762 FEW COMPLIMENTS Median filter, Q -meter oscillator, Plug a Pico module into the LPT port FOR Am detector with gain, and turn your pc into a spectrum Better squarewaves, Temperature analyser, 'scope, f -meter, dvm or NON- COMPLEMENTS monitor. data logger. EW+WW is offering two Douglas Self has been analysing Bengt such modules. See page 736. Olsson's work on non -complementary power amplifiers. An electro-acoustic measurement system for £750- 767 MIXED MODE representing a 20% discount exclusively for MODELLING EW+WW readers. Turn to page 780. The latest release of MicroCap features mixed -mode circuit modelling. But it is now also confined to Windows. Ben 799 NEW PRODUCTS Duncan asks "is this a feature or a Pick of the month - classified drawback?" for convenience. Next month: Probe for measuring mosfet switching losses, Triple stepper motor controller, Very fast power amplifier for instrumentation, Hybrid valve amp, Analysis circuits from energy use. Free - Circuit Ideas Pocket Book Part III Eight motorway tolling systems are about to be tested, starting next summer on a OCTOBER ISSUE - ON SALE 28 SEPTEMBER stretch of the M3, page 716. September 1995 ELECTRONICS WORLD + WIRELESS WORLD 713 "moving from schematic to layout could not be easier" KENWOOD Electronics World & Wireless World Jan 1995 TEST & MEASURING INSTRUMENTS A SUPERB RANGE OF OVER 100 on QUALITY INSTRUMENTS. PRO+ now quickroute 3.0 Available from with SPICE B.K. ELECTRONICS file export & SpiceAge Integrated Schematic and PCB Design for Windows 3.1 DDE Link! DESIGNER £99 *Schematic & PCB Drawing *1/2 layer auto -router *Supports FM -AM Signal Generators * Colour Pattern Windows printers/plotters *Full set of libraries *Clipboard Generators * Video Signal Analyser * Video Timing Analyser * Video Noise Meter support *Designer Special (manual on disk) also available. * Distortion Meter * Waveform Monitors * Vectorscopes *Audio Generators * Wow and Flutter Meters * Electronic Voltmeters PRO £199 * Digital Multimeters * Function Generators * Frequency Counters * Bus Analyser * Resistance Attenuator * Oscilloscopes * Fully *Schematic & PCB Design *Schematic Capture *Integrated Programmable Digital Storage Oscilloscopes Rats -Nest Generation *1-8 layer Auto -router (faster than * Regulated D.C. Power Supplies Designer) *Net -List Export *Supports Windows A free, 50 page colour brochure, including price list,is available on request. Please make your printers/plotters *CAD -CAM outputs. request on company headed notepaper, by post or by fax, to: P R 0 + £299 B.K. ELECTRONICS Unit 1 Comet Way, SOUTHEND-ON-SEA, MI As the PRO but also includes *Advanced Schematic Capture Essex, 592 6TR. 71 Tel: 01702-527572 (Busses,Power rails,etc) *Larger Schematic & PCB Designs Fax: 01702-420243 *Gerber file IMPORT for File Exchange *Extended libraries (CMOS,SMT,etc) *SPICE Export *SpiceAge DDE Link :Orbit 48 MobileProgrammer 0 Busses & power rails handled using Global Nets on PRO+ kromtr 3nic1011nol %ITN Oa 2 f-Llari I .1,1 0.. III II I j 1:j j 0 0 , I etEverything you need in one... No gimmicks... JIBS No adaptors... No after thoughts! The latest in (.5 design and technology from a company OPI o that understands and cares Designed toprogram EPROMs. EEPROMs, FLASH_ CC Serial EEPROMs. and Micro -controllers as standard -4r a, ;without fragile adaptor add onsi FM FA `1," mew;21117. Optional PL.D docking module 1114 kens:TT The latest in emulation techniques that others try to copy including 8 & 16 bit devices) Integrated Schematic & PCB Design. 16Mbits RAM with expansion to Mbits 8.16 and 32 bit formats 4111. Quickroute Systems Ltd., 14 Ley Lane, Marple Bridge, Real Windows & DOS erwiro- Stockport, SK6 5DD, U.K. Europe's largest programmer STAG manufacturer PROGRA,,MERS FREE EL.LJE Tel/Fax 0161 449 7101 °)call today on +44 10)1707 332148 -"" Demo or fax +44 (0)1707 371503 for further information *Prices exclude P+P and V.A.T. *VISA/MasterCard Pack Accepted *Network versions available. Available. CIRCLE NO. 104 ON REPLY CARD 714 ELECTRONICS WORLD+WIRELESS WORLD September 1995 COMMENT EDITOR Martin Eccles The industry we never had 0181 652 3128 the industrial revolution members EDITORIAL Duringof the aristocracy wishing to spend an ASSISTANT inheritance building a steam powered car or a Rob Allcock flying machine could always fmd an artisan to 0181 652 8638 assist them. Around this relationship, Britain's industries prospered and a number of Lord & CONSULTANTS Blacksmith Ltds became world leaders. Jonathan Campbell In the early nineteen eighties it seemed Philip Darrington history might repeat itself. University Frank.Ogden professors scoured the countryside looking for DESIGN & someone to turn their designs - half of which PRODUCTION were never committed to paper - into working Alan Kerr instruments. We were on our way -a few winners; EDITORIAL personal computers, digital effects consoles - ADMINISTRATION the new industrial age. Jackie Lowe But earlier this year one of the last major 0181-652 3614 subcontractors - Race - limped off the pitch.