[sdiy] Modified ASR working perfectly!

[David G. Dixon]

> >> E.g. connect output 1 while discarding 2,3,4. Scan at several kHz.
> >> Could create some nice aliasing?
> >
> > You got me there.  For me, aliasing is something you do when you don't
> want
> > other people to know your name.  :-b
> 
> Aliasing as in, nyquist, sampling of signals that have content above
> fs/2, and all that stuff. I'm sure you know what that is.

Yeah; I was just messin' widja!

> >> How fast can it scan? (you'd need a stable clock for that..)
> >
> > I've scanned it up to at least a few kHz, and it seems to work fine.
>  You
> > basically just get a copy of the input voltage then.  You can see the
> little
> > steps on the scope, but the output CV is effectively smooth.
> >
> >> What are you using for the clock comparator? How fast is it?
> >
> > Right now I'm using half of a TL072, which is 13V/us, or about 2us for
> full
> > output swing -- plenty fast enough for this application, I think.
> 
> Ok, but how fast does it start the swing after the input voltage
> passes the specified treshold level?

According to the datasheet, there is no lag per se.  The overshoot takes
about 100ns to settle.

> 
> >  The other
> > opamp on this chip is being used as an input buffer for the incoming
> signal.
> >
> > I'm afraid I can't answer all of these questions, because I'm actually
> > dropping my prototype board in the mail to one of our esteemed module
> > manufacturers for him to test, as he wishes to license the design from
> me
> > for a module.  Hence, I won't actually have the board when I go home
> > tonight.
> >
> >
> >