[sdiy] Inverting Amplifier as a Buffer Output.

David G. Dixon dixon at interchange.ubc.ca
Thu Jun 24 06:11:50 CEST 2010


> I used to use A all the time, but now I use mostly B, because I found that
> it is a helluva lot easier to lay out on the PCB, with or without the 10pF
> cap (which I always make provision for, whether I use it or not).  I have
> noticed no difference in how my circuits perform.
> 
> My $0.02 (probably only worth $0.01).

Oh, and I almost forgot to mention, if you are using it to buffer a
precision CV signal (like something which will be fed to the 1V/oct input of
a VCO, for example) then definitely use B.  The "outty" resistor in A will
cause tuning errors by creating a divider with the input resistor at the
receiving end.  The "inny" resistor in B will not.




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