[sdiy] Squaring volts

[harrybissell]

Try the Analog Devices AD633 for example

Also... there was some oscillator in an EDN magazine Design Idea
that made a sinewave with an LC circuit and a negative resistance...
iirc it did NOT use a squaring function to do the negative resistance...
I'd try to find that article...

H^) harry

"M.A. Koot" wrote:

> Hi everybody,
>
> I'm working on a project trying to make the van der Pol osscilator in analog
> electronics. To realize the circuit of the "negative resistor", I have
> developed a system wich involves squaring of the analog signal.
> It really seems this is needed. Now, the only way I know how to square an
> analog signal is using a ring modulator circuit with equal inputs. Though
> this really seems a clumsy way to achieve the squaring, and I'm also not
> sure if it would work.
> So I was wondering if anyone might know a better way to square an analog
> signal (these signals are not all 1 or so..)
> Does anyone maby know some analog chip to do this? Or is ring modulating
> really the way to do it? I tried using a VCA chip though (SSM2024 I
> thought), but these ones are only DC, and I have AC signals..
> I hope anyone could help me.
>
> Thanks!,
> Michiel Koot
>
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