RMS / DC converter circuit for measuring AC voltage in digital multimeter

Published:2011/7/6 19:46:00 Author:Lucas | Keyword: RMS converter, DC converter measuring AC voltage converter digital multimeter | From:SeekIC

For 2V rms sinusoidal input Ui, in order to get 2V DC output voltage U. , the positive half-cycle of Al is used as a noninverting amplifier with gain work, and RR1 is used to change the gain of A1; for 2V AC RMS input voltage, RR1 transfer the output DC voltage to 2V. Rl and Cl form the low-pass filter to make the output voltage ripple small and smooth.



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