Method for adjusting the rate of a horological module by means of fuses able to be destroyed by laser
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United States of America Patent
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Sep 19, 2000
Grant Date -
N/A
app pub date -
Nov 4, 1999
filing date -
Nov 5, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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).
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