Method of processing multi-level signals for simple clock recovery
US5825825A · kind A · utility
60Cited by
5References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 17, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Sep 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0331
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and a circuit for simple clock recovery from multi-level at high transmission rates. The circuit is compatible with standard PLL-type clock recovery techniques for NRZ and generalized two-level signalling. The timing information is extracted from a single threshold crossing, irrespective of the number of levels (M) of the signal. This was verified to provide sufficient spectral information for the proper operation of a clock recovery PLL. The threshold may be programmed for various line codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.