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From: djm@nmtvax.UUCP
Newsgroups: net.analog
Subject: Basic electronics -- FETs
Message-ID: <909@nmtvax.UUCP>
Date: Wed, 18-Dec-85 23:56:15 EST
Article-I.D.: nmtvax.909
Posted: Wed Dec 18 23:56:15 1985
Date-Received: Sat, 21-Dec-85 06:28:22 EST
References: <>
Reply-To: djm@nmtvax.UUCP (The Demented Teddy Bear)
Organization: Five Miles Beyond the Twilight Zone
Lines: 20
Summary: 

[Let my lines go, oh Eater of Lines!  No, I don't believe in it, but....]

I have a somewhat (hopefully) simplistic question:

    Is it possible to use a FET as a solid-state potentiometer, and if
so, what sort of driver do you need for it (AC, DC offset from ground, ...)?

The application is digitally controlled volume, resonance of filters, etc.
If I can use D/A converters driving some simple pot-equivalents, it would
make life fairly easy, but I'm not familiar enough w/ analog type stuff
to know if it'll work.  Comments?

    Dieter Muller
    (uucp)         ucbvax ! unmvax ! -------------------------V
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    (telepath_net) Hey you!  Yeah, you with the fuzzy face!

Choose a disclaimer, any disclaimer.  Now hold it so I can't see it....