Electronic circuit for a quartz crystal watch
US4133169A · kind A · utility
4Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Apr 19, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04D7/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic timepiece havng an integrated electronic circuit including a quartz crystal oscillator, connected to a multi-stage divider, which divider supplies various outputs of various frequencies to corrector circuits, a logic circuit and a motor control circuit. The motor control circuit includes a switch to allow the timepiece to be stopped by resetting at least one stage of the divider. One of the terminals of the motor is connected to one of the stages of the divider to allow the control of the frequency of the signal issued from this stage, and, therefore, the frequency of the quartz oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.