Published:2011/5/20 19:56:00 Author:leo | Keyword: circuit diagram, small DC singal voltage | From:SeekIC
As what is shown in the picture, this is a circuit that only permits the small DC electronic current to pass through. If the inputting signal Ui is a sinusoidal waveform with the asymmetric peak value, and if the VFM is 11V and negative peak is -9 V, this waveform has small DC voltage. In some application, it needs to output the small DC signals and eliminate the AC signals which common low-pass filter cannot do but this circuit can make it come true. In this circuit, the buffer A1 buffers the inputting signals, and then the voltage of the buffered signals comes through the capacitor C1 and is coupled to a complete AC waveform voltage U1.
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