Circuit to calculate square root of voltage?

From: Chaos Master (ch_at_os.master.INVALID.INVALID)
Date: 12/04/04 

Date: Sat, 4 Dec 2004 01:35:19 -0200

Hello people.

I am looking for a circuit to calculate the square root of a voltage,
V(out) = SQRT V(In). (e.g. I input 4V and 2V comes out, I input 3V and
~1.73V comes out).

Q: How can I do this?

[]s 

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