[sdiy] Temperature Compensated Exponential Converter Using SSM2164

[David G. Dixon]

> >   2164 is advertised to give more than five orders of
> >magnitude of log conformance, and we only need about three for a VCO, so
> I'm
> >not worried.
> 
> Conformance at what level?  Do they say?

I can't see where it actually says, specifically.  It simply implies a
constant 33mV/dB across the range.  However, the VCAs on any one 2164 are
matched to within 0.07dB at 0dB, and 0.24dB at -40dB, which would imply
fairly consistent performance, I think.

If the circuit requires some compensation at high frequencies, then that
would be a fairly trivial matter, I should think.  All we can do is suck it
and see!