29 Apr '12, 11pm

Unwanted noise? Deal with it

Unwanted noise? Deal with it

Unwanted noise is introduced in all electronic circuits, and all switching devices induce GND and Vcc noise. Additional sources add their part of noise onto clock lines, data busses, reference lines and more. Finally, power supply ripple and noise caused by load changes effects as well. Providing sufficient noise margin for Vcc and GND specifications is paramount for flawless functionality of ICs. Circuit designers are well aware of noise and jitter effects on clock and data lines; effects that may threaten data integrity and proper functionality of their systems. Once the causes of such unwanted noise are pinpointed their effects can be minimised for optimal operation with minimal BER problems. However, a “new” kind of noise has started to interfere with the functionality of electronic systems - Vcc and Ground noise, with major culprits called GND Bounce and Vcc Droop Jit...

Full article: http://www.electronicsweekly.com/Articles/30/04/2012/5354...

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