Simplified Synchronous Detection Circuit by Using Analog Switch and Differential Amplifier

Published:2011/6/4 22:46:00 Author:Michel | Keyword: Analog Switch, Differential Amplifier, Synchronous Detection Circuit | From:SeekIC

Circuit's FunctionThe full-wave rectifying type synchronous detection circuit also can be composed by alterindg differential amplifier's input signal.Its basic work principle is similar to the same frequency detection circuit of low-frequency drift polarity converting mode.It uses differential amplifier with informal parameters to receive the output of the two-way switch analog switches.The output DC stability of this circuit is high.It can be used in synchronous detection circuit which uses dozens of KHZ low frequency as low-frequency lock-in amplifier because it adopts analog switch.



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