Phase locked loop having constant gain for recovering clock from non-uniformly spaced data
US5173664A · kind A · utility
7Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Sep 16, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0898
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A constant loop gain phase lock loop for recovering a clock from non-uniformly spaced data pulses utilizes a programmable current source and charge pump whereby the current into the charge pump is proportional to the number of VCO clock periods between data pulses. As the time between pulses increases the current charging the pump increases and when the time between pulses decreases the current charging the pump decreases to maintain a constant loop gain independent of the data pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.