Electronic timepiece with temperature compensation
US4453834A · kind A · utility
38Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Jul 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic timepiece having a quartz crystal oscillator circuit as a timebase signal source is provided with a temperature compensation system to compensate timebase signal frequency deviations with temperature, all components of the system being incorporated in the timepiece IC chip. The system is based on a temperature-sensitive voltage stabilizer circuit whose output voltage is current-converted to control the frequency of a temperature-insensitive oscillator circuit. Date generated on the basis of the latter oscillator frequency is applied to compensate the timebase signal frequency, by a capacitor switching technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.