Apparatus and method for timing recovery from a pseudo-ternary signal
US4122397A · kind A · utility
6Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Feb 17, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for obtaining clock timing information from an equalized pseudo-ternary signal, such as is exemplified by a signal using the modified duobinary code, includes a level selector in which the signal is sliced at a predetermined amplitude. A slicing level reference circuit provides the threshold voltage for the level selector so that only the upper level portion of the original is obtained for processing. This upper level portion is applied to an amplifier and then to a frequency selection circuit which is tuned to the clock frequency of the original signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.