Temperature detector circuit for timepiece

Details Temperature detector circuit for timepiece Temperature detector circuit for timepiece

1980-05-22

1984-08-14

Miska, Vit W.

Horology: time measuring systems or devices

Regulating means

For compensation

331176, G04B 1712, H03L 100

Patent

active

044653794

ABSTRACT:
A circuit for compensation of timekeeping inaccuracies induced by ambient temperature variations. A bridge circuit having a temperature sensitive resistive element in one branch and a resistance of programmed variation in the other branch outputs a changing unbalanced voltage to drive a comparator. A change in polarity of the comparator output detects the ambient temperature and causes a counter controlling the programmed resistance to output signals to a timekeeping regulation circuit whereby timekeeping is made accurate. Initial corrections are made in the programmed resistance branch to adjust for off-design performance of the vibrator in the timepiece oscillator.

REFERENCES:
patent: 3719838 (1973-03-01), Peduto et al.
patent: 3999370 (1976-12-01), Morokawa et al.
patent: 4001721 (1977-01-01), Fukuda
patent: 4015208 (1977-03-01), Hammer et al.
patent: 4020426 (1977-04-01), Helle331176

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