[sdiy] DC offset removal help

[cs e]

It's the old EFM Dual ADSR...running off of a 556.  I don't know if
there are schematics online.  But like I said, there is essentially a
.2 V offset right after gate, and it eventually settles to .1 V.  I'm
going to try a OA90 (the only germanium I can find here) with a pull
down like Harry suggests - what value of pull down resistor, 10K?

On 8/12/08, cheater cheater <cheater00 at gmail.com> wrote:
> What envelope, what schematic...?
>
> On Tue, Aug 12, 2008 at 3:36 AM, cs e <modulemania at gmail.com> wrote:
>> I've got an ADSR envelope here, which has a TL072 as output buffer.
>> Unfortunately, there's around a 200mV DC offset on its output, with no
>> gate applied. (This won't allow my VCA to shut off properly - I know
>> the VCA is OK, because I have other envelopes.)  Of note is that the
>> 200mV reduces (over a long time) to around 100 mV or so.
>> How can I easily and quickly remove this offset...I don't mind if 200
>> mV is chopped off of the output.
>>
>> Thanks for any ideas.
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