[sdiy] favorite "magical" opamp?
René Schmitz
uzs159 at uni-bonn.de
Thu Oct 7 17:59:47 CEST 2010
David G. Dixon schrieb:
> This discussion has got me wondering whether the way we configure these
> opamps might not be just as (or more) important than the opamps themselves.
> I'm thinking about the value of the feedback/input resistors and the use of
> compensation caps here.
IMO same thing as with tubes. Components don't have a sound per se, only
a circuit does. The values of external resistors/impedances vs internal
capacitances does make a big difference for example. Try this at home
folks: Inverting unit gain amp with an opamp. Vary R, with 10k, 100k,
1Meg, or even 10Meg resistors. Watch it processing a squarewave signal
and notice the differences.
Cheers,
René
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