[sdiy] Log/exp conversion

[Jonathan Lippard]

At 02:28 PM 12/22/01 -0500, media at mail1.nai.net wrote:

>While I'm sure there are much more VCO-specific designs on the web, you
>might want to go to National's website and download application notes AN-30
>"Log Converters", and AN-311 "Theory and Applications of Logarithmic
>Amplifiers".

While we're on the subject, has anyone ever used the exp converter from the 
app note for the LM13600? (Sorry, I don't remember the number.)  It's the 
one that uses one of the linearizing diodes for temperature compensation, 
and it's used in PAIA's 9700 modules...or has anyone used the 9700 and can 
comment on it?  I like it for the obvious reason that it doesn't need a 
tempco resistor.  I can't build one right now though, or likely for some 
time to come...if anyone can shed light on its quality, I'd appreciate it...

-Jonathan