Method and apparatus for agile phase noise filtering using phase locked loops
US6333678A · kind A · utility
13Cited by
2References
6Claims
0Family size
Assignee
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Key dates
| Filing date | May 12, 2000 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | May 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/235
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for filtering phase noise or jitter from a reference signal that may be of any arbitrary rate. By using a synthesizer to convert a signal at the output of a low noise signal source to a signal with frequency similar to a high speed output rate with desired relationship to the reference signal, a limitation normally caused by the narrow tuning range of a VCXO (a typical low noise signal source) can be overcome. Conversely, the desired high speed output rate may be converted to one similar to the VCXO frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.