I think your evaluation is quite accurate. I was just wondering if
anybody out there had to the sense to know that this circuit is a
terrible attempt at a speech processing. The fact that the principle of
this circuit is to severely clip an audio waveshape... has distortion
written all over it!

Professor
www.telstar-electronics.com



Frank Gilliland wrote:
On 15 Apr 2005 10:49:22 -0700, "Professor"
wrote in
. com:

Yes... this circuit is a real piece of work. The distortion from
this
circuit must be tremendous.


A4 is a low-pass filter so it shouldn't be too noisy if the clipper
is
used in moderation. But I can say, just by looking at the schematic,
that the frequency response sucks and it will have some major
problems
in a number of practical installations. The overall design looks like
it was pasted together from a circuit scrapbook.

One more thing I noticed: The clipper circuit would be better located
between A2 and A3. That way A3 can serve as a buffer between the
clipper and the filter.







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