AC / DC conversion circuit composed of LM3O1A

Published:2011/7/6 19:13:00 Author:Lucas | Keyword: AC conversion, DC conversion | From:SeekIC

Operational amplifier Al is connected in series in the feedback circuit to be used as the inverting amplifier, for negative input signal, VDl is stopped and not related to circuit, so Al output is 0V. A2 works as the gain of -R2Ui/Rl according to the resistance of Rl, R2. For positive input signals, A2 adds the signal from R3 and Rl. If R3 = Rl / 2, the U. = UiR2/Rl. In order to get the output voltage which is equal to the average of the input voltage, then C2 and R2 provide low-pass filter characteristics for A2.



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