In the conventional art of the pulse wave full-wave rectifying circuit using a diode, the rectified signal is severely distorted as the frequency increases according to the characteristics of the diode.;The present invention compares an AC input signal with a reference voltage by two comparators, passes the upper and lower components of the reference voltage separately, inverts the lower components of the components in the operational amplifier, and sums the two signals. The present invention relates to an active full-wave rectification circuit by the reference level comparison method, which obtains a high efficiency rectification effect without distorting the signal.
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