Phase detector

Details Phase detector Phase detector

H - Electricity

03

D

H03D 13/00 (2006.01) H03L 7/087 (2006.01) H03L 7/16 (2006.01)

Patent

CA 2059273

A phase detector (20) is provided for detecting the phase difference between a first input signal and a second input signal and providing an output corresponding thereto. The phase detector (20) comprises a dual state phase detector (28), a tri-state phase detector (32), a control input (2) for receiving a control signal, and a control circuit (8, 12, 14 and 16) for selecting either the dual state phase detector (28) or tri-state phase detector (32). The dual state phase detector compares the phase difference be- tween the first input signal and the second input signal. The tri-state phase detector (32) compares the phase difference between the second input signal and the inverse of the first input signal. The control circuit selects the output of the dual state phase detec- tor (28) or selects the output of the tri-state phase detector (32) based upon the control signal.

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