Feed forward clock and data recovery unit
US7292662B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2004 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Feb 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0083
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a feed forward clock and data recovery unit for recovering a received serial data bit stream having a feed forward phase tracking unit for tracking of a sampling time to the center of a unit interval of the received data bit stream. The feed forward phase tracking unit can include a sampling phase generation unit, an oversampling unit, a serial-to-parallel-conversion unit, a binary phase detection unit, a loop filter, a finite state machine, a binary rotator, and a data recognition unit for recovery of the received data stream which includes a number of parallel data recognition FIR-Filters. Further, each data recognition FIR-Filter can include a weighting unit for weighting data samples of the deserialized data stream, a summing unit for summing up the weighted data samples, and a comparator unit for comparing the summed up data samples with a threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.