Phase detector

Details Phase detector Phase detector

H - Electricity

03

L

328/82

H03L 7/00 (2006.01)

Patent

CA 1293776

PHASE DETECTOR Abstract of the Disclosure A phase detector includes a bridge of FETs which are simultaneously rendered conductive by pulses of a reference signal having a very small duty cycle. A higher frequency signal, whose phase in relation to the reference signal is to be detected, is supplied to a gate of one of the FETs. A bridge output signal is low pass filtered and differentially amplified to produce a phase detector output signal. The phase detector output signal can be used directly to control the frequency of a voltage controlled oscillator which produces the higher frequency signal. - i -

584666

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