Electronic timepiece oscillator circuit

Details Electronic timepiece oscillator circuit Electronic timepiece oscillator circuit

1979-10-03

1980-12-23

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With pulse transforming means

368200, 331 47, G04C 1900, G04B 1712, H03B 2700

Patent

active

042414350

ABSTRACT:
An electronic timepiece having a high frequency oscillator with a high level of frequency stability and an electronically controlled low frequency oscillator. The phase of a high frequency signal from the high frequency oscillator is compared with a signal from the low frequency oscillator, and a digital signal is produced in accordance with the phase difference. The digital signal alternately controls the frequency of the low frequency signal to be slightly greater than an exact submultiple of that of the high frequency signal and slightly less that an exact submultiple of the high frequency signal, so that with respect to a relatively long time interval the frequency of the low frequency signal is an exact submultiple of that of the high frequency signal, the low frequency signal being thereby utilizable as a timebase signal for the timepiece.

REFERENCES:
patent: 4159622 (1979-03-01), Akahane
patent: 4173862 (1979-11-01), Nakagiri et al.

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