[sdiy] ota's as gates.

[harrybissell]

depends on how far below the rail... if its just a diode drop or so it would be
fine. look at the schematic of the 3080 and you'll see what I mean

H^) harry

Nils Pipenbrinck wrote:

> Dumb question maybe, but anyways.
>
> I'm designing a little noise gate circuit around a 3080. I can't guarantee
> that my control-voltage will down to -V however. Right now I always have a
> little bit of current flowing into the Iabc input, and thus the OTA does not
> shut down completely.
>
> This lead me to the strange idea to just raise the negative supply of the
> OTA a bit.. maybe a diode drop or so. I think that way I get a little
> dead-zone.
>
> Would this work? Will the ota misbehave if I try to pull the Iabc input pin
> below the negative supply voltage?
>
> Thanks,
>
>   Nils