Re: Simple audio signal to level convertor?

"Eeyore" <rabbitsfriendsandrelations@[EMAIL PROTECTED]
> wrote in message
news:486C1510.E1D699E3@[EMAIL PROTECTED]
>
>
> Bob Eld wrote:
>
> > Insure that the max peak of the audio signal is within
> > the ADC range.
>
> Diode clamp it !
>
> Graham


Yeah you can clamp it but then you loose that and higher values as peaks.
The whole idea is to convert the peaks to numbers not to clip them off.

There's really no need to clamp it. The processor input will have internal
"diodes" that will keep the voltage from exceeding  the rail voltage plus
a
little. Likewise the input voltage won't go below ground. A series
resistance should be added to limit the input current and a shunt
resistance
added to keep the DC level from ****fting up due to rectification by these
clamps.