Linearizer circuit and an electronic watch incorporating same
US4464061A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1981 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Aug 7, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L1/027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A linearizer circuit comprises a frequency mixer which mixes a first frequency varying in accordance with a change in a parameter and a second frequency from a reference oscillator which has no dependence upon any parameter at a given proportion, and a derivation circuit for producing an output pulse corresponding to the average period of an output from the mixer, thus providing a linearized output for the parameter. The linearizer circuit may be assembled into a watch as means to detect the environmental temperature of the watch. By detecting temperature information with this means, a temperature compensation of a clock signal may be achieved in accordance with a temperature offset from a reference temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.