Electronic timekeeping apparatus with temperature compensation and method for compensating same
US4761771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1987 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | May 4, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic timekeeping apparatus includes a temperature value generating circuit for generating a temperature value, a temperature value converting circuit including a slope adjusting circuit which provides a slope corrected output in accordance with a frequency versus temperature characteristic of the apparatus in response to the temperature value, a pace compensation data circuit for producing pace compensation data corresponding to the slope corrected output, and a pace compensating circuit for compensating pace of the apparatus in accordance with the pace compensation data. An offset adjustment circuit may operate on said temperature value or said slope corrected output. A method for compensating pace of an electronic timekeeping apparatus includes the steps of generating a temperature value corresponding to temperature of the apparatus, correcting the temperature value in accordance with slope of a frequency versus temperature characteristic of the apparatus to produce a slope corrected value, producing pace compensation data in response to the slope corrected value, and adjusting the pace in accordance with the pace compensation data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.