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Chip Amps Amplifiers based on integrated circuits

Grounding of opamps. Signal or Power?
Grounding of opamps. Signal or Power?
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Old 23rd July 2007, 02:09 AM   #1
Arx is offline Arx  Canada
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Join Date: Aug 2003
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Default Grounding of opamps. Signal or Power?

If keeping seperate star grounds for signal and power, where would the opamps' (buffer and servo) power ground go to? I would assume signal ground, just due to the low currents involved. Is this correct?

-Nick
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Old 23rd July 2007, 09:47 AM   #2
AndrewT is offline AndrewT  Scotland
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no.
The decoupling across the opamp sends pulses into the power ground. Try to return these pulses separate from the clean audio ground.
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regards Andrew T.
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