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<br /> March 2013<br /> Volume 119<br /> Issue 1923<br /> £5.10<br /> THE ESSENTIAL ELECTRONICS ENGINEERING MAGAZINE<br /> www.electronicsworld.co.uk<br /> Special Report 1:<br /> Filters<br /> Special Report 2:<br /> Power<br /> R&D<br /> From China<br /> <br /> CONTENTS 03<br /> REGULARS<br /> 05 TREND<br /> OPPORTUNITY REMAINS FOR ELECTRONICS<br /> SUPPLIERS, EVEN IN UNCERTAIN TIMES<br /> 06 TECHNOLOGY<br /> 08 THE TROUBLE WITH RF...<br /> LOOPHOLE<br /> by Myk Dormer<br /> 06<br /> Ku-band 50W<br /> GaN HEMT<br /> 40 R&D FROM CHINA<br /> DESIGN OF AN ULTRA-LOW POWER ANGLE<br /> MEASURING INSTRUMENT<br /> FEATURES<br /> 10 THE ZERO-TRANSISTOR IC, A NEW PEAK IN IC DESIGN<br /> 44 T&M COLUMN Bill Laumeister, Strategic Applications Engineer at Maxim Integrated<a title="EWMarch13 zmag page 1" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=1"> March 2013 Volume 119 Issue 1923 £5.10 </a> <a title="EWMarch13 zmag page 2" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=2"> </a> <a title="EWMarch13 zmag page 3" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=3"> CONTENTS 03 REGULARS 05 TREND OPPO</a> <a title="EWMarch13 zmag page 4" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=4"> </a> <a title="EWMarch13 zmag page 5" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=5"> TREND 05 OPPORTUNITY REMAINS FOR THE ELECTRON</a> <a title="EWMarch13 zmag page 6" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=6"> 06 TECHNOLOGY HIGH-SPEED ATOMIC FORCE MICROSC</a> <a title="EWMarch13 zmag page 7" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=7"> TECHNOLOGY 07 First Secure Microcontroller </a> <a title="EWMarch13 zmag page 8" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=8"> 08 THE TROUBLE WITH RF... Loop</a> <a title="EWMarch13 zmag page 9" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=9"> THE TROUBLE WITH RF... 09 Un</a> <a title="EWMarch13 zmag page 10" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=10"> 10 OP-AMPS THE ZERO-TRANSISTOR IC, A NEW </a> <a title="EWMarch13 zmag page 11" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=11"> OP-AMPS 11 Figure 3: The</a> <a title="EWMarch13 zmag page 12" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=12"> 12 OP-AMPS Figure 5: </a> <a title="EWMarch13 zmag page 13" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=13"> </a> <a title="EWMarch13 zmag page 14" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=14"> 14 VIDEO FILTERS EVERYTHING OLD IS NEW AG</a> <a title="EWMarch13 zmag page 15" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=15"> VIDEO FILTERS 15 Figure 2: Typical S</a> <a title="EWMarch13 zmag page 16" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=16"> 16 VIDEO FILTERS Figure 3: Frequency respo</a> <a title="EWMarch13 zmag page 17" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=17"> </a> <a title="EWMarch13 zmag page 18" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=18"> 18 FILTERS A LOW-VOLTAGE NMOS MOCDBA-BASED </a> <a title="EWMarch13 zmag page 19" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=19"> FILTERS 19 Figure 3: Prop</a> <a title="EWMarch13 zmag page 20" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=20"> 20 FILTERS CDBA and Its Realization </a> <a title="EWMarch13 zmag page 21" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=21"> </a> <a title="EWMarch13 zmag page 22" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=22"> 22 FILTERS (5) where α , α and β</a> <a title="EWMarch13 zmag page 23" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=23"> </a> <a title="EWMarch13 zmag page 24" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=24"> 24 FILTERS </a> <a title="EWMarch13 zmag page 25" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=25"> EVENT 25 NEW UK Hits the Road This Year 20th</a> <a title="EWMarch13 zmag page 26" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=26"> 26 FILTERS A SINGLE SUPPLY LEVEL SHIFTER </a> <a title="EWMarch13 zmag page 27" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=27"> FILTERS 27 Fig</a> <a title="EWMarch13 zmag page 28" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=28"> 28 FILTERS Figure 4</a> <a title="EWMarch13 zmag page 29" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=29"> FILTERS 29 Figure 7: Measured l</a> <a title="EWMarch13 zmag page 30" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=30"> 30 FILTERS Figure </a> <a title="EWMarch13 zmag page 31" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=31"> FILTERS 31 Figur</a> <a title="EWMarch13 zmag page 32" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=32"> 32 POWER ASYMMETRICAL PARASITIC INDUCTANCE </a> <a title="EWMarch13 zmag page 33" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=33"> POWER 33 diode faces reverse voltage and</a> <a title="EWMarch13 zmag page 34" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=34"> 34 POWER Figure 7: </a> <a title="EWMarch13 zmag page 35" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=35"> POWER 35 Figure 10: Pseudo half-</a> <a title="EWMarch13 zmag page 36" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=36"> 36 POWER Figure 15: Powe</a> <a title="EWMarch13 zmag page 37" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=37"> POWER 37 DIGITAL POWER TELEMETRY REDUCES E</a> <a title="EWMarch13 zmag page 38" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=38"> 38 POWER </a> <a title="EWMarch13 zmag page 39" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=39"> POWER 39 </a> <a title="EWMarch13 zmag page 40" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=40"> 40 R&D FROM CHINA JINXUE SUI, LI YANG, YA</a> <a title="EWMarch13 zmag page 41" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=41"> R&D FROM CHINA 41 SHANDONG INSTITUTE OF BUSI</a> <a title="EWMarch13 zmag page 42" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=42"> 42 R&D FROM CHINA Figur</a> <a title="EWMarch13 zmag page 43" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=43"> </a> <a title="EWMarch13 zmag page 44" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=44"> 44 T&M COLUMN THIS IS A MONTHLY COLUMN COVER</a> <a title="EWMarch13 zmag page 45" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=45"> T&M COLUMN/PRODUCTS 45 All too ofte</a> <a title="EWMarch13 zmag page 46" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=46"> 46 PRODUCTS Dual-Channel Hall-Effect Directi</a> <a title="EWMarch13 zmag page 47" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=47"> PRODUCTS 47 Farnell element14 Introduces New </a> <a title="EWMarch13 zmag page 48" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=48"> 48 PRODUCTS BRIGHT, ROBUST AND LONG LIFE MULT</a> <a title="EWMarch13 zmag page 49" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=49"> CLASSIFIED 49 From £239 + VAT </a> <a title="EWMarch13 zmag page 50" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=50"> 50 LAST NOTE CAMBRIDGE PHOTONIC SYSTEMS CENTR</a> <a title="EWMarch13 zmag page 51" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=51"> </a> <a title="EWMarch13 zmag page 52" href="http://viewer.zmags.co.uk/publication/3bfcc2a8?page=52"> </a>