Wave correction clock and method
US7288974B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Feb 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R40/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wave correction clock of the present invention receives a wave signal including time information based on information defined by a pulse width of a rectangular pulse output at a predetermined period, and a period measuring section measures a signal period TRn of the rectangular pulse. A time difference measuring section obtains a time difference between the signal period TRn and an internal reference period TB where the signal period TRn is within a predetermined range, and a time difference determining section corrects generation timing of a reference pulse at the internal reference period TB from an average value of time differences obtained when the rectangular pulse where the signal period TRn is within a predetermined range is detected multiple times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.