# Squaring Circuit [closed]

I have to study biomedical electronic, but there is a problem. I searched but could not find things I want.

How can I design squaring circuit with op-amp, if input is a 50 mV and I have to get output value = X^2. = 2500 mV for example?

• As always, AN-31. Oct 12 '16 at 7:54
• $50^2 \neq 250$ ;) You need a multiplier circuit. This paper will help you: nopr.niscair.res.in/bitstream/123456789/6896/1/… Also, as @IgnacioVazquez-Abrams stated, "Opamp Circuit Collection" will help you as well: ti.com/lit/an/snla140b/snla140b.pdf Oct 12 '16 at 7:56
• @Mehmet Do you mean a circuit that converts a sine wave to a square wave? Is your input going from 0V to 50mV, or is it -25mV to +25mV? Oct 12 '16 at 7:59
• Why do you need to square the signal? Oct 12 '16 at 18:40
• @BruceAbbott, i'll bet it's because he wants a power signal. if the OP wants r.m.s., he'll need to square root also. it will seem silly if this squared biomed signal gets sampled and inputted into an embedded processor or DSP, in which the squaring can be done with a single instruction. Oct 12 '16 at 19:39