Reply-To: "LY" email@example.com>
From: "LY" firstname.lastname@example.org>
Subject: Re: Help needed with audio mute circuit
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NNTP-Posting-Date: Wed, 18 Sep 2002 18:45:25 EDT
Organization: Prodigy Internet http://www.prodigy.com
Date: Wed, 18 Sep 2002 22:45:25 GMT
> a self-conducting jfet can shorten the output to gnd, but you will need a
> negative voltage bigger than the neg.output swing + Upinch-off to reliably
> put it into high impedance. Since there is not much current involved, you
> can do that with a voltage doubler circuit after your transformer. With
> arrangement the quality will not suffer, as the signal is not passing
> through the fet.
Yes. Do you think that having a JFET sitting at the output is a problem?
e.g. ESD. The thought of generating a negative bias voltage makes me
> Really the relays are not an expensive option, you need only one relays
> multiple channels if there are enough contacts and again you can power it
> with a separate rectifier from your transformer to switch before the
> regulator starts to drop out.
The problem is that this is a compact, low power design with a lot of
so relay isn't really an option. Oh yeah, and price is a big issue as well.
BJTs on the other hand are less a cent a piece.....
There has to be a way.... isn't there?