[sdiy] Modified ASR working perfectly!

[cheater cheater]

On Wed, Feb 10, 2010 at 09:04, David G. Dixon <dixon at interchange.ubc.ca> wrote:
> Well, the saga of the modified CGS Analog Shift Register has come to a
> satisfying conclusion.  I built and tested my revised board tonight, and it
> is perfect, as far as I can tell.  This baby has an input buffer (which
> shares a TL072 with the clock comparator) with input protection resistor and
> diode clamps, a modified clock which can be triggered with any wave which
> crosses 2V (not just edgy ones), two DG409 dual 4x1 analog muxes instead of
> CD4052s to avoid having to shift the input up and down, a 78L05 to provide
> 5V for the CD4024 ripple counter and the mux logic and enable inputs,
> metallized polypropylene sampling caps, and a single LF444 instead of four
> individual LF356s for the S&H buffers, with no additional output buffer
> stages (none are required since the input signal is processed as is), just
> 1k output resistors.  I even managed to fit in guard traces which completely
> surround the high-impedance S&H traces, and to fit the whole circuit onto a
> board which is only 2.1" x 3.7".

Think it can be used to process audio?

E.g. connect output 1 while discarding 2,3,4. Scan at several kHz.
Could create some nice aliasing?

How fast can it scan? (you'd need a stable clock for that..)

What are you using for the clock comparator? How fast is it?

Cheers
D.