Understand and reduce DC/DC switching-converter ground noise

by Jeff Barrow, Senior Director of Analog IC Design, Integrated Device Technology, Inc. , TechOnline India - November 29, 2011

As complexity of designs increase and applications become more densely populated, the physical-circuit implementation plays a critical role in the electrical integrity of the system. This article illustrates two major sources of ground noise and offers suggestions on how to reduce both.

DC/DC switching-power converters are notorious for physically disrupting an otherwise carefully designed system and circuit schematic designs. These power converters drive unwanted charge onto electrical ground, causing false digital signals, flip-flop double clocking, EMI, analog-voltage errors, and damaging high voltages.
 
As the complexity of these designs increase and applications become more densely populated, the physical-circuit implementation plays a critical role in the electrical integrity of the system. This article illustrates two major sources of ground noise and offers suggestions on how to reduce both.
 

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