[sdiy] Temperature Compensated Exponential Converter Using SSM2164

[Neil Johnson]

Hi,

Ian Fritz wrote:
> At 11:32 AM 8/31/2009, David G. Dixon wrote:
>> > As is mentioned in Roman's site, SSM2164 itself is not so sensitive
>> > to temperature.  It may have heating function.
>>
>> I seriously doubt that!  It simply has a gain temperature constant of
>> 3300ppm/K, either by design or by accident.
>
> Again the circuit I'm refering to is *not* on Roman's website.  He  
> posted it to this list in 1999.  It is almost identical to Houshu's  
> design.  Component values are different, that's all!

For those unable to search the online synth-diy archives at

http://search.retrosynth.com/synth-diy/index.html

(search for "roman sowa ssm2164")

I have pulled up the relevant email and decoded the GIF file.  Here  
is the full version online:

http://www.njohnson.co.uk/misc/0drift.html

Cheers,
Neil
--
http://www.njohnson.co.uk