Phase-difference detecting circuit and method of reducing power

Details Phase-difference detecting circuit and method of reducing power Phase-difference detecting circuit and method of reducing power

1990-06-06

1992-04-07

Pascal, Robert J.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 455 76, 455343, 328155, H03L 700

Patent

active

051031922

ABSTRACT:
A phase comparison circuit includes phase comparison device for generating an output signal corresponding to the difference in phase between a first input signal and a second input signal. The phase comparison device has an active mode, and a standby mode in which power consumption is reduced. A phase-difference detecting device is connected to the phase comparison device for outputting a control signal when the phase difference between the first and second input signals is smaller than a predetermined value. The phase comparison device is switched from the standby mode to the active mode in response to the control signal.

REFERENCES:
patent: 4631496 (1986-12-01), Borras et al.
patent: 4893094 (1990-01-01), Herold et al.
"Handheld Telephone for 800 MHz-Band Cellular Radio Systems", J. Nakagawa et al., 37th IEEE Vehicular Technology Conference, Jun. 1-3, 1987, pp. 435-440, New York.

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