[sdiy] Serge Waveshaper

[Aaron Lanterman]

I'm looking at Patent 4306480 (easily gotten with pat2pdf.org).

Is Fig. 6 the famous "Serge VC Waveshaper" one hears so much about? It's 
got an op amp, a bipolar, and two diodes. The diodes are connected in the 
same direction in series; one is grounded, and the other is hooked to the 
negative terminal of the o amp. The collector of the transistor is hooked 
to the negative terminal of the op amp, and the base is hooked between the 
diodes.

I'm having a hard time wrapping my head around exactly what this circuit 
does.

- Aaron

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