high resistance voltmeter circuit diagram

Posted on Feb 7, 2014

A high-input-resistance op-amp, a bridge rectifier, a microammeter, and a few other discrete components are all that are required to realise this versatile circuit. This circuit can be used for measurement of dc, ac rms, ac peak, or ac peak-to-peak voltage by simply changing the value of the resistor connected between the inverting input terminal

high resistance voltmeter circuit diagram
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of the op-amp and ground. The voltage to be measured is connected to non-inverting input of the op-amp.

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