[sdiy] Patchell's Boggling 13700 Expo Converter Thing???

[René Schmitz]

Jim Patchell wrote:
>     I selected this aproach for several reasons.  Also, I would like 
> everyone to note, I did not design this circuit...somebody else posted 
> this circuit, as a low noise, low distortion vca...my attempts to find 
> that post in the archives has so far has proven fruitless...

Wasn't that one of Mike Irwings designs in EDN Mag?

>     Still, the reasons I selected it are:
> 
>     1. It was very linear.
>     2. It had the lowest parts count for the performance I got.
>     3. It is real cheap...at 80 cents it performed better than the next 
> best aproach I could come up with that came in at about $6.

Cheers,
  René

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uzs159 at uni-bonn.de
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