Phase synchronization circuit and electronic apparatus
US7616067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2007 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Nov 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1072
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase synchronization circuit and an electronic apparatus equipped with the phase synchronization circuit are provided. The phase synchronization circuit includes an oscillation unit, a phase comparison unit, a loop unit, a drive unit, an oscillation control signal unit, and a gain characteristic information obtaining unit. In the phase synchronization unit, a compensation signal is generated based on the gain characteristic information obtained by the gain characteristic information obtaining unit at the time of the usual phase synchronizing operation, and the drive unit is controlled by the compensation signal so that a product of the input signal-oscillation frequency conversion gain at the time of actual operation and the drive signal with which the drive unit drives the loop filter unit is constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.