High frequency signal generator from a horological time base
US6326850A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Nov 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A generator (50) able to be fitted to a clockwork system including a crystal (51a) used as a time base, includes a first oscillator (51) able to supply a first frequency (f1), a second oscillator (56) able to supply a second frequency (f2), a divider (60) able to supply a third frequency (f3) from the second frequency, a comparator (52) able to compare the third and first frequencies, and a control loop including a filter (54) connected to the comparator and able to control the second oscillator. The generator is characterised in that it includes a component (58) able to provide an indicator (LCK) containing the state of the loop, and in that the filter (54) can receive the indicator (LCK) and, in response, have a narrow (or respectively wide) band, when the loop is (or respectively is not) locked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.