[sdiy] multichannel smoothed S&H and separate boards

[harrybissell]

Hi Antti

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 ???

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

H^) harry

Antti Huovilainen wrote:

> Hi
>
> I'm planning a system where one DAC centrally provides many control
> voltages to circuits running on separate boards (similar setup as
> polyphonic synths use). I'm using a similar smoothing system as some
> Oberheim synths used:
> DAC -> MUX -> "big" cap -> resistor -> small cap -> buffer
>
> Question goes: Isn't it better to have the MUXes and "big" (22nF or so)
> capacitors on the mainboard, so that fast signals don't need to be passed
> through "long" (20 inches) interconnects? If so, would it be better to
> have the smoothing resistors on the main board or on the separate circuit
> boards?
>
> Antti
>
> Give a man a fire, and he'll be warm that day,
> Set him alight and he'll be warm for the rest of his life