Method and apparatus for recovering a serial data stream using a local clock
US5757297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/385
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A serial data stream is recovered using a local clock, which is asynchronous to the clock used to transmit the serial data. The incoming serial data stream is phase shifted or delayed by a digital phase-locked loop so that it may be reliably sampled by the local clock. The DPLL samples the serial data stream and captures data on both the rising and falling edges of the local clock employing three edge detectors. This partitions the data stream into two bit samples, which the DPLL presents to a deserializer. The deserializer converts the serial data to parallel data and assembles the received data back into data bytes. The deserializer also generates a received byte clock used for presenting the parallel data to, for example, the ESCON channel logic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.