Clock phase discriminator

Details Clock phase discriminator Clock phase discriminator

G - Physics

01

R

328/28

G01R 25/04 (2006.01)

Patent

CA 1257661

CLOCK PHASE DISCRIMINATOR ABSTRACT OF THE DISCLOSURE A clock phase discriminator measures phase difference between a pair of digital clock signals to produce phase error signals used to adjust the frequency of one clock so as to reduce the phase difference. The discriminator includes a latch circuit that responds to successive transitions of the clock signals by undertaking a multi- state phase measurement transition path in which only one state variable changes at a time. The latch circuit reduces the exposure of the phase discriminator to race conditions while measuring the phase difference and producing the error signals.

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