Synchronous detector

Details Synchronous detector Synchronous detector

H - Electricity

03

D

H03D 3/18 (2006.01) G01C 19/72 (2006.01) H03D 1/22 (2006.01) H04B 1/30 (2006.01)

Patent

CA 2061772

In a synchronous detector a first local signal from a first local signal generator is frequency divided by a frequency divider to obtain a second local signal. The polarity of the first local signal is inverted by a polarity inverter in synchronization with the second local signal, and the output of the polarity inverter is used to synchronously detect the output of an AC amplifier by a first synchronous detector. The synchronous detected output is synchronously detected by the second local signal in a second synchronous detector, the detected output of which is averaged by a filter.

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