[sdiy] Single chip (3 opamp) wave multiplier

[Don Tillman]

   From: jhaible at t-online.de (jh.)
   Date: Mon, 12 Feb 2001 22:49:07 +0100

   > Von: Martin Czech <czech at Micronas.Com>
   > > At least now I understand how these AD sin/cos chips work. (schemos on
   > > my site)
   >
   Ah - looks a bit like the Don Tillman version of the Scanner !

(http://www.geocities.com/SoHo/Museum/4459/diy/sineshaper.html)

There are similarities.  We're both extending (or abusing) diff amps.
I use a diode logic circuit to transfer control between neighboring
transistors, and here positive and negative diff amp transfer
functions are summed.

  -- Don

-- 
Don Tillman
Palo Alto, California, USA
don at till.com
http://www.till.com