Phase detection circuit

Details Phase detection circuit Phase detection circuit

H - Electricity

03

D

329/16

H03D 3/00 (2006.01) H04L 7/033 (2006.01)

Patent

CA 1243084

ABSTRACT OF THE DISCLOSURE A phase detection circuit for detecting the difference in phase between an analog signal including clock components, and a reference clock signal, is described. It includes an analog- to-digital converter for sampling the analog signal at the frequency of the reference clock signal and providing a k-bit first digital signal. It also includes a delay circuit for sampling the first digital signal at a frequency equal to one half the frequency of the reference clock signal and providing a k-bit second digital signal. Finally, a multiplier is included for multiplying the first digital signal by the second digital signals to provide data representative of the phase difference. The circuit of the in- vention is capable of operating at a processing speed which is twice as high as the modulation rate of analog signals.

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