Electronic timepiece

Details Electronic timepiece Electronic timepiece

1983-02-18

1984-09-25

Miska, Vit W.

Horology: time measuring systems or devices

Regulating means

For adjusting the frequency or beat

368202, G04B 1712, G04B 1720

Patent

active

044733038

ABSTRACT:
An electronic timepiece is provided with a temperature compensation system which combines precise control of the timebase oscillator circuit frequency over a narrow temperature range with control of the frequency divider circuit operation to provide relatively large step changes in compensation, thereby providing accurate temperature compensation over a very wide temperature range. Data for control of this compensation is produced by computing the square of a data value which varies proportionally with temperature, with the resultant data being adjusted to provided compensation control which exactly matches the temperature characteristic of the timebase oscillator circuit.

REFERENCES:
patent: 3978650 (1976-09-01), Hashimoto et al.
patent: 4272840 (1981-06-01), Morozumi et al.
patent: 4321698 (1982-03-01), Gomi et al.

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