Hi Ron,
Thanks for the link,
yes I saw that circuit before, I want to use it but my circuit is working with 12 to 15V there is no NEGATIVE voltage for this square rooter,
I bought few 633 IC's few months ago for 5 or 6$ but did not use them yet,
Anyway the power supply is not able to generate any negative voltage, is there any way to convert or modify this circuit for a common power supply?
I need it for a kind of audio amplifier and want to get a square root from its ouput signal, to remove or limit kind of noise.