[sdiy] multichannel smoothed S&H and separate boards

[Antti Huovilainen]

On Thu, 23 Sep 2004, harrybissell wrote:

> If you are thinking of the MAtrix 6 et-al... the resistors and caps are 
> actually part of a scheme to be able to make both fast and slow moving 
> voltages from the same input.  Is this what you are thinking ???

Partially yes. In my case the update rate is fast enough that any "fast" 
moving output is not needed and the system is used purely for smoothing 
the output rate (~500Hz) ripple.

> I'd probably put the buffer after the first cap, then the RC after that

This requires one extra op-amp for the buffer which is exactly what I am 
trying to avoid.
So I will rephrase my original question: If I am using such cap -> res -> 
cap smoothing system, are there any disadvantages to moving the resistor 
and second capacitor to the target circuit board?

Antti

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