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Chip Amps Amplifiers based on integrated circuits

BUF-634 dc offset trim
BUF-634 dc offset trim
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Old 27th March 2007, 12:15 AM   #1
hags is offline hags  United States
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Default BUF-634 dc offset trim

I'm looking for a dc offset trim circuit for the BUF-634 .
I have worked up a simple unity gain line buffer with it but the dc offset on the input/output is horrible.
I would like to stay away from any capacitor coupling.
Any suggestions would be much appreciated.
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Old 27th March 2007, 04:49 PM   #2
hags is offline hags  United States
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Is there no way to null the dc offset on monolithic devices?
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Old 27th March 2007, 05:37 PM   #3
analog_sa is offline analog_sa  Europe
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There are probably several ways. Assuming the offset is stable you may consider applying a similar dc voltage of opposite polarity at the input. Or use an inverting dc servo.

I personally think that the 634 sounds worse than most caps anyway.
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