Phase comparator and phase-locked loop
US8248104B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2008 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Sep 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase comparator is provided that solves the problem that a VCO cannot be controlled with high precision. A frequency divider frequency-divides a VCO signal applied as input to an input terminal (10) in steps, and supplies the VCO signals of each step as output. A latch unit latches the VCO signal that is applied to the input terminal (10) and each VCO signal that was supplied from the frequency divider based on a reference signal that is applied to an input terminal (11). An output unit supplies the latch results realized by the latch unit as phase difference signals that indicate phase differences of the reference signal and the VCO signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.