Temperature-compensated piezoelectric oscillator

Details Temperature-compensated piezoelectric oscillator Temperature-compensated piezoelectric oscillator

1995-12-07

1996-11-05

Mis, David

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331 1R, 331 17, 331158, H03B 504, H03B 532, H03L 102, H03L 700

Patent

active

055721699

ABSTRACT:
A temperature-compensated piezoelectric oscillator includes a voltage-controlled piezoelectric oscillator, a first frequency divider, a second frequency divider, and a controller. The voltage-controlled piezoelectric oscillator has an output frequency controlled by a control voltage and oscillates the output frequency having a center frequency f.sub.0 at an ambient temperature of t.sub.0. The first frequency divider frequency-divides the output frequency from the voltage-controlled piezoelectric oscillator by N to output a first divided output frequency. The second frequency divider frequency-divides the output frequency from the voltage-controlled piezoelectric oscillator by M to output a second divided output frequency. The controller controls the control voltage to be applied to the voltage-controlled piezoelectric oscillator on the basis of a frequency difference between the first and second divided output frequencies upon a variation in ambient temperature of t.sub.0 to keep the output frequency of the voltage-controlled piezoelectric oscillator at the center frequency f.sub.0.

REFERENCES:
patent: 4371271 (1983-02-01), Bellet
patent: 4537515 (1985-08-01), Dinger et al.
patent: 4558456 (1985-12-01), Bezard et al.
patent: 4872124 (1989-10-01), Shimizu et al.
patent: 5442669 (1995-08-01), Medin

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