Spread spectrum modulation technique for frequency synthesizers
US6351485B1 · kind B1 · utility
17Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1998 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Sep 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0891
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A spread spectrum modulation technique uses digital control logic to switch back and forth between two feedback divider ratios so that the PLL spreads output clock frequency between two limits determined by the ratios. The spread spectrum control logic can be integrated into any PLL frequency synthesizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.