Scott Dattalo wrote:
>
> Chuck McManis wrote:
> >         Digitize a single bit at exactly double the highest frequency using
 the
output of a zero crossing detector. The resulting bit stream is
relatively short (for
a 20mS sample) and given the spacing of the two tones, it should produce
unique bit
patterns for each tone pair.
> > --Chuck

>
> Slow down, Chuck! You're not the only one to have this idea. John Payson
 posted
> something similar a few months back. Steve Hardy and I also had a similar
> discussion about the same time.
> If you (or anyone else) want a copy of a MATLAB program plus some theory
                                           ^^^^^^^^^^^^^^

> on this subject, then drop me a line. (I wouldn't think of wasting valuable
> PIC-List bandwidth for something not related to PICs...)
> Scott

Good morning\day\evening Scott ;)

Would you be so kind to send me MATLAB program talking above ?
I'm still trying to go throw enormous difficulties with detecting DTMF
and another like DTMF signals from one bit comparator's output ;)
I think you program example will be so helpful.

WBW Dmitry.