Voltage controlled oscillator circuit for reducing the effects o

Details Voltage controlled oscillator circuit for reducing the effects o Voltage controlled oscillator circuit for reducing the effects o

1994-12-27

1997-08-19

Pascal, Robert

Oscillators

Electromechanical resonator

Crystal

331 10, 331175, H03B 504

Patent

active

056592710

ABSTRACT:
An oscillating apparatus includes a quartz crystal oscillator for outputting a reference frequency signal, a phase-locked loop for oscillating a desired frequency signal on the basis of an output from the quartz crystal oscillator, a unit for detecting vibration components added to the quartz crystal oscillator, a unit for variably controlling phases and levels of the detected vibration components, a unit for obtaining a correlation value between the detected vibration components and vibration components in the phase-locked loop to variably control the phases and the levels, and a unit for controlling the phase-locked loop on the basis of the phases and levels of the vibration components which are variably controlled.

REFERENCES:
patent: 4318063 (1982-03-01), Przyjemski
patent: 4453141 (1984-06-01), Rosati
patent: 4891611 (1990-01-01), Frerking

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