EDN - April 9, 2009

4G telecommunication technology carries explicit requirements for minimum network speed. Designers must find a way to reliably and cost-effectively reach those targets.

• Departments and Columns
• Signal Integrity
• Dangerous games
• Supply Chain
• Counterfeit components find new markets
• United Nations turns up heat on mercury
• PC industry in 2009 to see sharpest unit decline ever
• Tales From The Cube
• Flip-flop flap
• edn.comment
• Power line: Does market success require resets?

• Design Ideas
• Diagnose LEDs by monitoring the switch-mode duty cycle
• Single pin controls relay, intermittent buzzer, and status LED
• Simple two-transistor circuit lights LEDs
• Twin-T power oscillators work as dc-biased ac sources

• Features
• Design Feature
• Online tools home in on analog design
• Managing high-voltage lithium-ion batteries in HEVs

• Pulse
• Simulator speeds eye measurements
• FPGA serial I/O hits 11.3 Gbps
• Power-supply modulation steps up handset-power-amp efficiency
• IMEC shows flexible packaged-IC assemblies

• Supplement
• Inverting buck-boost converter regulates LED current
• Solid-state lighting and efficiency from a global perspective
• Solving the LED-driver challenge for light-bulb replacement
• Enlightenment on LEDs
• A fail-safe approach to LEDs