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In Reply to: Re: Diff amp balanced? posted by Sector-7G on September 30, 2004 at 06:12:44:
> My NFB loop when needed is balancedI'm not a fan of balanced circuits in general and balanced feedback is even more complex. Haven't tried it.
Theoretical analysis of a differential feedback amplifier shows sensitivity to variations in OPEN-LOOP GAIN in the multiple paths.
Only when that gain goes to infinity can we claim absolute balance and only in ideal zero-delay conditions. This inevitably means high level of NFB, which I try to avoid (based on my sonic evaluations).
I'd love to hear about your balanced solution if it's simpler and achieves a well-balanced drive to the final stage.
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Follow Ups
- Re: Diff amp balanced? - serus 08:14:31 09/30/04 (1)
- Re: Diff amp balanced? - Sector-7G 19:38:48 10/01/04 (0)