voltage controlled resistors

[Magnus Danielson]

From: "walter carpenter" <t02e at hotmail.com>
Subject: voltage controlled resistors
Date: Sun, 13 Feb 2000 20:19:13 PST

> This might be a stupid idea, but has anyone ever built a simple "voltage
> controlled resistor" that, with a switch, could override a potentiometer? is
> this possible? it would be nice to have lfo's controlling as many things as
> possible :)

Hm. This really sounds like something you would build with OTAs. One or
possibly two OTAs in a gyrator setting should be an interesting thing. For
most settings will a single OTA be suiteable, but if you need both ends of the
resistor to "float" and push/pull current I think a little more advanced tricks
have to be used. Hmm...

Cheers,
Magnus