Temperature compensating circuit

Details Temperature compensating circuit Temperature compensating circuit

1980-05-23

1982-04-13

Krawczewicz, Stanley T.

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331 48, 331162, 368159, 368202, H03L 100

Patent

active

043250360

ABSTRACT:
Temperature compensating circuit for an electronic timepiece having two piezo electric resonators having different frequency-temperature characteristics.
Two piezo electric resonators are a major resonator having smaller frequency variation rate in temperature variation and a subsidiary resonator having larger frequency variation rate in temperature variation.
And also the temperature compensating circuit includes a variable counter for counting the output signal of the major oscillator having the major resonator, a gate time setting circuit controlled by both the outputs of subsidiary and the variable counter, and a counter for counting the output signal of the major oscillator.
As a result, the temperature compensating circuit is able to improve the accuracy of the timepiece.

REFERENCES:
patent: 3978650 (1976-09-01), Hashimoto et al.
patent: 4159622 (1979-07-01), Akahane
patent: 4272840 (1981-06-01), Morozumi et al.

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