Baseband phase-locked loop
US8358729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2009 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | Oct 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/093
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An example method includes receiving a phase correction signal representing a phase difference between a source signal and a reference signal, generating a first control voltage from the phase correction signal using a charge pump circuit, generating a second control voltage from the phase correction signal in response to a digitally filtered version of the phase correction signal, wherein the second control voltage corrects for an offset error present in the first control voltage, calculating a VCO control signal based on a linear combination of the first and the second control voltages; and generating the source signal in response to the VCO control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.