Phase-locked loop having filter with wide and narrow bandwidth modes
US6064273A · kind A · utility
9Cited by
14References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Jun 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase-locked loop utilizes a pair of diodes in a loop filter design for providing fast acquisition of a reference signal during an acquisition mode, while maintaining a more narrow bandwidth in a locked mode of operation. During the acquisition mode, the diodes are conducting and the loop filter bandwidth is wide, which provides for a faster response time. As the reference signal is acquired, the diodes no longer conduct and the loop filter bandwidth becomes more narrow for tracking the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.