Timepiece assembly comprising a mechanical oscillator associated with an electronic device for controlling its mean frequency
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United States of America
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May 10, 2022
Grant Date -
Apr 2, 2020
app pub date -
Sep 17, 2019
filing date -
Sep 17, 2019
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Abstract
A timepiece is provided with a mechanical movement which includes a mechanical resonator, a sensor detecting oscillations of the mechanical resonator, and a braking device arranged to generate braking pulses in response to a control signal provided by a control circuit associated with an auxiliary oscillator. The control circuit is arranged to be capable of detecting a negative or positive temporal drift in the oscillation of the mechanical resonator and to generate, in a correction period, in association with the braking device, when the temporal drift corresponds to at least a certain loss, a series of braking pulses which are applied to the mechanical resonator at a frequency FSUP in a given range of values which is preferably higher than a frequency FZ (N)=2·F0c/N, F0c being a set point frequency for the mechanical resonator and N a positive integer number.
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