Low jitter integrated phase locked loop with broad tuning range
US6498538B1 · kind B1 · utility
1Cited by
1References
15Claims
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Key dates
| Filing date | May 30, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | May 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
System and method for providing low noise signal having a broad tuning range (1 GHz to 10 GHz, or larger), with associated jitter no more than about 10 percent of the selected period of a target output signal. In a first stage, a ring-based VCO phase locked loop system provides a broad tuning range with some associated noise, and a second stage in a first state is relatively transparent, with no substantial differential attenuation based on frequency. After phase lock is achieved, the second stage is switched to a second state with low associated noise and high differential attenuation based on input signal frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.