Method and apparatus for multiphase, fast-locking clock and data recovery
US7242739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2003 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Aug 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/042
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for clock and data recovery that is advantageous in burst-mode systems is disclosed. This clock and data recovery method allows a) fast locking to a rapidly changed phase of the transmission clock, and b) stable tracking of a slowly changing phase of the transmission clock. Such fast locking minimizes the “guard band” between consecutive transmission bursts, while stable tracking provides reliable data tracking, resulting in the efficient use of bandwidth. A plurality of clock signals, is generated, each having a different phase. The phase of an input signal data stream is determined and a desired clock signal in the plurality that corresponds to the phase of the input data stream is selected and used to sample the input signal data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.