Edge integrating phase detector

Details Edge integrating phase detector Edge integrating phase detector

H - Electricity

03

B

H03B 5/00 (2006.01) H03L 7/091 (2006.01)

Patent

CA 2067593

Abstract of the Disclosure A edge integrating phase detector for a phase locked loop passes a portion of a sync edge an input video signal as a sampled signal to an integrator (16) in response to a gate pulse nominally centered on a timing reference point of the sync edge. The sampled signal has a positive and negative portion. The integrator produces from the sampled signal a control signal for a VCO (12) that is proportional to the unbalance between the positive and negative portions. The gate pulse is generated from the output of the VCO as a function of the nominal period of the input video signal.

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