Doepfer

> hi group,
>
> i was wondering if it's possible to build a simple (passive?) slew
> limiter with a view to rounding off a gate signal enough to
> reduce/remove the clicks produced by controlling vca's with gate signals.
>
> i googled, but came up with a ton of stuuff that's a bit more than i
> need.
>
> i need no voltage control, indeed not even a variable slew rate.
>
> any ideas?
>
> thanks,
>
> stu

The simple low pass on the DIY page should do the job. The values for R1 and
C1 depend upon the desired slew rate which is ~ R1*C1. With 1uF and 10k you
obtain ~ 10 ms slew rate. The upper half of the A-170 uses this circuit
(with R1 as a combination of a fixed resistor and a potentiometer) followed
by a buffer amplifier to avoid voltage losses caused by the load connected
to the R/C combination. But for simple Gate/VCA control a small voltage loss
should not be a problem.

Best wishes
Dieter Doepfer