Phase locked loop device and method thereof
US8324882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Dec 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A phase locked loop device includes a phase detector that measures a difference in phase between a reference clock signal and an output clock signal of the phase locked loop. The phase detector provides a pulse having a width indicative of the phase difference. A phase measurement module determines a digital value based on the pulse width. Accordingly, the digital value provides an indication of the phase difference between the reference clock signal and the output clock signal. A series of the digital values can be recorded to indicate how the phase difference varies over time, thereby providing a useful characterization of device behavior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.