[sdiy] linearize OTA for VCF?

[Ian Fritz]

----- Original Message -----
From: "Terry Michaels" <104065.2340 at compuserve.com>
To: "harry" <harrybissell at prodigy.net>; "synth"
<synth-diy at dropmix.xs4all.nl>
Sent: Sunday, September 09, 2001 7:25 AM
Subject: Re: [sdiy] linearize OTA for VCF?


> The way I got around this in my VCA design, which uses the CA3280 with
> diode bias activated, is I set the gain levels so that the OTA clipping
> point coincides with the output buffer reaching the power supply rail.
> You're going to clip there anyway.

That's a good tip, thanks. Of course, the buffer gain can be whatever you
want, since it is an I-V converter. What value of gain (or diode bias
current) do you use?

  Ian