Exp converters (silly idea?)

[Thierry Rochebois]

>It's just backwards.  The V and the T are the wrong sides of the
>exponential function.  ("Damn!")  Now if you were looking for a log
>VCO... 


Yes, that's why I suggested to use a synched linear sawtooth to trigger
the sample & hold device, not the exp curve itself.

Input ------>
              Comparator 
saw(-t)----->     |
                  V
exp(-t)----->   S & H ---->  Exp(Input)


It samples exp(-t) and holds it when Input equals -t.

Regards,

Thierry Rochebois
DSP engineering
Canam Computers  (Quartz D2D softwares)
http://www.canamcomputers.com