Phase-locked loop having charge pump controlled according to temperature and frequency
US5751194A · kind A · utility
6Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Dec 6, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0898
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase locked loop (PLL) includes a phase comparator (12), a charge pump (13), a loop filter (14) and a voltage controlled oscillator (15). In order to minimize the lock-in time of the PLL under conditions of varying external temperatures, the PLL is supplied with temperature measurements, and the output of the charge pump is controlled according to both the external temperature and a desired frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.