Frequency control apparatus and method and storage medium storin

Details Frequency control apparatus and method and storage medium storin Frequency control apparatus and method and storage medium storin

1998-09-25

2000-09-12

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 65, 327155, 365233, H03L 700

Patent

active

06118344&

ABSTRACT:
A frequency control apparatus controls the frequency of an output signal thereof in synchronism with an externally input timing signal. A variable frequency oscillator generates the output signal such that the output signal has a frequency thereof variable in response to a control signal input to the variable frequency oscillator. An input device receives the timing signal. A checking device checks a monitor amount variable in response to the frequency of the output signal from the variable frequency oscillator, in timing in which the timing signal is input. A calculating device calculates a difference between the checked monitor amount and a predetermined desired amount. A control device controls the control signal input to the variable frequency oscillator such that the calculated difference becomes zero.

REFERENCES:
patent: 5923220 (1999-07-01), Honma

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