Phase comparator for use with a digital phase locked loop or other phase sensitive device
US4668917A · kind A · utility
13Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1986 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Mar 26, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0331
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase comparator circuit for use with a digital phase-locked loop which can be programmably altered to provide phase comparisons either on the leading edge or leading and trailing edges of the phase-locked loop output signal, to provide an increased operating bandwidth capability to the phase comparator circuit. The phase comparator circuit can be configured to cooperate with a multiple frequency digital phase-locked loop such that the results of a phase comparison will be delayed until a frequency adjustment has been completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.