[sdiy] Temperature Compensated Exponential Converter Using SSM2164

[HOSHUYAMA]

Hello List,

I developed a new style temperature compensation method for 
exponential converter using SSM2164.  

http://houshu.at.webry.info/200908/article_1.html
http://houshu.at.webry.info/200908/article_2.html
(Japanese blog, but, comments in the schematics are in English.)

On a simulator, change of frequency is less than 1% from 0 
to 40 degrees in C, over 10 octave.

On my breadboard, it showed very good temperature 
stability.  Even when I touch the chip, frequency change was
less than 0.2%.

Best,

Sam HOSHUYAMA
Saitama, JAPAN