On Fri, 13 Oct 2000 15:30:34 -0500, you wrote:

>    Hi all,
>
>    I have some troubles using ISD, I'm using an amplifier to get 3W or =
so,
>but when the message ends, a "pop" is heard, I'm tryng to eliminate it =
but I
>couldn't up to now...
>
>    I also used a LM386 (suggested by manufacturer) but nothing, if =
somebody
>had this problem before and, fixed it, please help...
>
>    Thanks in advance,
>
>    Gonzalo
I have used the ISD chips a lot. You MUST use the differential outputs
differentially, as they drop sharply to 0V after the message. I
usually use a stereo power amp chip in bridge mode, which also
eliminates the need for an output capacitor. Some single-ended amps
may be useable in differential mode (e.g. LM380N8), otherwise you need
to add a differential amp stage - an LM358 + 4 resistors costs next to
nothing and works fine.

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