Half-wave synchronous detection circuit by a switching circuit

Posted on Mar 28, 2007

Analog switches alternately pass, off the input signal by the low pass filter to make pulsating flow smoothing (removing pulsating become DC). OP Xiao Ai is an enlarged buffer

Half-wave synchronous detection circuit by a switching circuit
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amplifier, together with a low-pass filter behind weeping input resistance contrast, output resistance must be small. If you do not add a DC blocking capacitor C, error or drift preamp DC offset generated will affect circuit performance, capacity should be chosen to ensure that the signal frequency sufficient small impedance 6 OP amplifier A2 is zero cross comparator, should be selected conversion speed of Ic, or will cause a phase delay. Reference input contains noise, should add some hysteresis (positive feedback) port sinusoidal waveform signal crossing the premise that if you can use the TTL level, you can use C-MOS analog switch to simplify configuration of open Trlz switching circuit.

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