Method for adjusting the rate of a horological module by means o

Details Method for adjusting the rate of a horological module by means o Method for adjusting the rate of a horological module by means o

1999-11-04

2000-09-19

Miska, Vit

Horology: time measuring systems or devices

Regulating means

For adjusting the frequency or beat

G04B 1800

Patent

active

061201782

ABSTRACT:
A method for adjusting the rate of a horological module, said horological module including a printed circuit (1) on which are mounted in particular a quartz (10) and an integrated circuit (20) including an oscillator (21) driven by the quartz (10), a frequency divider circuit (22) with several stages (22.1 to 22.15), an adjustment circuit (23) allowing the introduction of a correction factor of the division ratio of said frequency divider circuit (22), and a memory circuit (24) containing data (N) representing said correction factor. The adjustment method according to the present invention uses a laser device to allow said data (N) representing the correction factor to be coded by the selective destruction of fuses (F1, F2; F.1 to F.6; F.1* to F.6*) forming memory elements of said memory circuit (24).

REFERENCES:
patent: 4199726 (1980-04-01), Bukeske et al.
patent: 4254494 (1981-03-01), Meda
patent: 4345320 (1982-08-01), Berney
Patent Abstracts of Japan, vol. 008, No. 271 (P-320), Dec. 12, 1984 & JP 59 138981 A (Suwa Seikosha KK), Aug. 9, 1984.
Patent Abstracts of Japan, vol. 007, No. 140 (E-182), Jun. 18, 1983 & JP 58 054705 A (Citizen Tokei KK), Mar. 31, 1983.

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