[sdiy] Flag this message Buffer signal input 2164/2180?

Tim Parkhurst tim.parkhurst at gmail.com
Mon Apr 11 05:40:27 CEST 2011

On Sun, Apr 10, 2011 at 4:05 PM, Alexandra Savidis <ax.savidis at yahoo.com> wrote:
> Hello all,
> There is any need or benefit to buffer the input signal (using an
> op-amp), when using a SSM2164 or THAT2180 for a modular synthesizer's
> VCA?

It looks like you don't have to (all the schematics in the data sheet
don't use an input buffer), but I would think most applications do so
to allow mixing several signals at the input. You probably get a
higher impedance input with an op amp too.

Tim (has several tubes of the little buggers) Servo
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings

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