Full digital bang bang frequency detector with no data pattern dependency
US8634510B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2011 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0995
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bang-bang frequency detector with no data pattern dependency is provided. In examples, the detector recovers a clock from received data, such as data having a non-return to zero (NRZ) format. A first bang-bang phase detector (BBPD) provides first phase information about a phase difference between a sample clock and the clock embedded in the received data. A second BBPD provides second phase information about a second phase difference between the clock embedded in the received data and a delayed version of the sample clock. A frequency difference between the sample clock and the clock embedded in the received data is determined based on the first and second phase differences. The frequency difference can be used to adjust the frequency of the sample clock. A lock detector can be coupled to a BBPD output to determine if the sample clock is locked to the clock embedded in the received data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.