EDNE April 2012 - (Page 2)

VoICe oF tHe enGIneer contents april12 o to tion, g bscrip renewal, su om/ ur free For yo n-europe.c ame and n d e www. your family r number nter eade r e d e (the ail) an ID cod on our em subted ne nli quo t the o fill ou tion form. ip scr RENEW NOW Sorting out 4G: are we there yet? d e pa r t m e n t s & Columns 7 EDN.comment: A slice of Pi 16 Baker’s Best: EMI problems? Just the facts, please 18 Test & Measurement World: Test MIMO Wi-Fi and LTE radios over the air 36 Signal Integrity: Howard Johnson discusses parallel resonance 60 Tales from the cube: Printer parking brake 30 Can we achieve the performance levels of the IMT-Advanced global standard for international mobile telecommunications? by Janine Love, Contributing Technical Editor Balancing GBWP and quiescent current Minimizing power dissipation in analog applications requires a careful balance to optimize dissipation. by Namrata Pandya, Microchip Technology Inc 45 Protect POE systems from electrical hazards Noise Wars: Projected Wider deployment of powercapacitance vs. over-Ethernet exposes sysinternal noise tems to increased risks. 22 by Phillip Havens and Chad Marak, Littelfuse Inc 49 produCt roundup 58 Microcontrollers; Embedded computing boards New challenges emerge to maintain touchscreen performance. by John Carey, Cypress Semiconductor Corp Cover image: shutterstoCk/giulia fini-gulotta DesigniDeas 53 Make an asynchronous clock for VPX-based PCIe systems 3V 5.1 3V 0.1 F VDD VDD OUT 12 pF X1 9.84375 MHz 12 pF DATA ENABLE 5k IC2 X1 MAX1472 X2 PAOUT GND/PAGND 22 pF 680 pF 27 nH 15 pF 22 nH 15 pF 220 pF 0.47 F 220 pF 0.01 F IC1 MAX6577 TS0 TS1 54 Use a photoelectric-FET optocoupler as a linear voltage-controlled potentiometer 55 Wireless temperature monitor has data-logging capabilities 57 RC-timed shutoff function uses op amp and momentary switch 2 EDN EUROPE | APRIL 2012 EDNDI5230 Fig 1.eps DIANE www.edn-europe.com http://www.edn-europe.com/renewal http://www.edn-europe.com

Table of Contents for the Digital Edition of EDNE April 2012

Cover
Contents
International Rectifier
Contents
RS Components
Masthead
Comment
International Rectifier
Pulse
Analog Devices
FTDI
Digikey
Mouser
Baker's best
Digikey
Test & Measurement
Agilent Technologies
Digikey
Protect POE systems
Hirose
Coilcraft
Mesago
Cover Story
Digikey
Signal Integrity
RS Components insert
Balancing GBWP and quiescent current
Noise wars
Design Idea
Product Roundup
Tales from the cube

EDNE April 2012