Method for adjusting the mean frequency of a time base incorporated in an electronic watch
US11537087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2019 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Sep 23, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G3/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device for determining a constant parameter of an inhibition value for adjusting the device operating frequency of a watch equipped with a quartz oscillator. The following steps are performed by a self-calibration circuit of the electronic watch device: from a first external pulse and a second external pulse received from a system external to the watch and separated by a measurement time, corresponding to a reference number of reference periods for a periodic calibration signal derived from the time-measurement signal and having a calibration frequency derived from the natural frequency of the quartz oscillator, determining a calibration parameter representative of a ratio between a calibration period and a reference period for the periodic calibration signal, and determining a constant inhibition parameter as a function of the calibration parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.