[sdiy] Simple squaring circuit

[René Schmitz]

Hi Sam,

it looks promising. I think I'll give it a try and compare it to 
a 1496 multiplier. Which ever has the lower parts count wins.

Cheers,
 René

At 13:26 18.07.02 +0900, you wrote:
>Hello Rene,
>
>How about "Log-Exp" approach?
>
>  exp(2*log(abs(x))) = x^2
>
>  Input -> [Full wave rectifier] -> [log] -> [*2] -> [exp] -> Output
>
>RMS detector by THAT may be inspiring.
>
>http://www.thatcorp.com/datashts/600032-1.pdf
>
>If you can used matched diodes, what you need after rectifier are
>one opamp and two diodes for logarithm function and multiplication, 
>and one opamp and one diode for exponential function.
>
>Best,  Sam Hoshuyama

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159