Resonator temperature compensated time base and watch using said

Details Resonator temperature compensated time base and watch using said Resonator temperature compensated time base and watch using said

1982-12-06

1985-08-27

Roskoski, Bernard

Horology: time measuring systems or devices

Regulating means

For compensation

368 11, 368200, 331 66, 331 70, G04B 1720

Patent

active

045375151

ABSTRACT:
To compensate for frequency variation in the quartz oscillator 4, 6 due to temperature variation, a second quartz oscillator 12, 14 forming a thermal sensor is employed. The beat frequency fB (circuit 16) which is counted in the counter 26 for a period of time T.sub.1 gives a measurement corresponding to temperature. The number which is thus counted is raised to its square and by means of the comparator 30 taken away from the pulses counted by the divider 8 with a periodicity T.sub.T. The system may be used to provide temperature compensation for a time keeping quartz time base.

REFERENCES:
patent: 4298971 (1981-11-01), Morokawa et al.
patent: 4325036 (1982-04-01), Kuwabara
patent: 4437773 (1984-03-01), Dinger et al.

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