Single supply precision rectifier scaling amplifier and LPF

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01:01:13

Single supply precision rectifier from intersil CA3140 data sheet. You could make it with an lm358 if the AC to be rectified is bellow 1 or 2 KHz. Better to use a CA3140 as it is a fast single rail opamp, though there are probably others that would be OK.

 The second opamp scales the DC for RMS assuming a sinewave input.

published 8 years ago

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