SV: Re: [sdiy] Buchla Model 148 Harmonic Generator

[karl dalen]

There are easier solutions, take one or several 4018
integrate the squares, shape triangle to sine.

KD

--- Tim Daugard <daugard at sprintmail.com> skrev:

> From: "Oakley Sound" <tonyallgood at btinternet.com>
> 
> > > f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 9f, 10f
> >  > Does this module actually do this?
> >
> > Yes. And its mostly done by waveshaping.
> >
> > Full wave rectifiers give you the doubling, and the rest is bizarre
> > combinations of diodes and clipping circuits. Clever.
> 
> I can figure out how to get 2f, 4f, and 8f  with no problem. I suspect that
> 3f can be
> mostly made with f clipped to be square and the subtract f from the
> squarewave. 6f is 3f
> doubled. 9f is 3f through a second tripler.
> 
> That leaves the ones I can't figure out - 5f and 7f. These could be pulled
> out with a
> filter, but then you need the filter to track the input (or onboard) f.
> 
> Tim Daugard
> AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
> http://home.sprintmail.com/~daugard/synth.htm
> http://home.earthlink.net/~synthfred/h_toctop.htm (Fred's online edition)
> 
> 
> 
> 
> 
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