waveform blending?

[tim at redragon.demon.co.uk]

The EMl101 uses a centre taped pot with a waveform connected to each tap.

The Serge is basically a full-wave rectifier implemented with 1/4 of a LM3900
norton op-amp. I seem to remember a clipping diode in the feed back circuit
for the square \ pulse output.The Wave shape control varies the dc offset
at the input to the rectifier.  If youwant more details try Frank Evantoff
and Serges patent from the IBM patent server (you can download a copy for
free).  for the patent number try a search of the diy arc'

Enjoy

Tim.

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