Strobe technique for recovering a clock in a digital signal
US7573957B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Jun 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31703
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus is provided to recover clock information embedded in a digital signal such as a data signal. A set of strobe pulses can be generated by routing an edge generator to a delay elements with incrementally increasing delay values. A set of latches triggered by incrementally delayed signals from the edge generator can capture samples of the data signal. An encoder can convert the samples to a word representing edge time and polarity of the sampled signal. The word representing edge time can be stored in memory. An accumulator can collect the average edge time over N samples. The average edge time can be adjusted with a fixed de-skew value to form the extracted clock information. The extracted clock information can be used as a pointer to the words stored in memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.