[sdiy] Temperature Compensated Exponential Converter Using SSM2164

[Magnus Danielson]

Ian Fritz wrote:
> At 11:37 AM 8/29/2009, David G. Dixon wrote:
>>   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?

The SSM2164 has log control input and claim good conformance for 100 dB, 
which cranks out as 5 orders of magnitude. If you look at the design you 
will see that CV hits the control voltage input while the current input 
is wired to -15V.

A first one is used as a multiplicative compensation, just as in Jims 
design...

Cheers,
Magnus