[sdiy] Barry Klein AD

[Oren Leavitt]

Hi Karl,

Alot of op-amps don't like to drive capacitive loads directly without some minimum resistance decoupling the cap from the output.
The cap may be causing the op-amp to oscillate at a high frequency which looks like a little bit of DC across the cap.

HTH,
Oren

-----Original Message-----
From: Karl Ekdahl <_nial_ at yahoo.com>
Sent: Mar 11, 2004 2:58 PM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] Barry Klein AD

Hello everonye, i'm currently playing around with the
Barry Klein envelope and of course, there's a problem.
If i have zero resistance on the attack pot - to get a
immediate response - nothing happends. On my scope it
looks like the main cap is charging a *little* bit,
and then goes to zero. This can of course be
eliminated by adding a resistor inbetween the cap and
the attack/decay pot, but then i don't have an
immediate attack and that's what i want. Why this
behaviour?

thanks

Karl

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