Half Wave Synchronous Detection Circuit of Switch Circuit

Published:2011/6/10 2:37:00 Author:Michel | Keyword: Switch Circuit, Half Wave, Synchronous Detection Circuit | From:SeekIC

Circuit's Functions Synchronous detection circuit is used to detect the signal drowned by noises,it isthe most important circuit units of submerged phase-locked amplifier and it has many practical way.This circuit belongs to the synchronous detection's basic way,which uses a switch circuit to test phase difference.And its output voltage EO = EXCOS φ,that's to say,it can get signal amplitude and phase φ.If the reference signals is the same phasewith the unknown signal, it can obtain the average DC voltage output.For example,cutoff frequency of lower level low-pass filter is dropped, noises' constant efficiency width will be narrowed and S/N ratio will be improved.



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