Device for the recovery of a clock signal from a binary signal
US4437071A · kind A · utility
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4References
7Claims
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Assignee
Inventor
Key dates
| Filing date | Dec 7, 1981 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Dec 7, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The device for controlling a local clock signal H both in frequency and in phase by means of a binary signal S comprises logical means for delivering two signals S.sub.1 and S.sub.3 representing respectively the sign of the phase difference and the sign of the frequency difference between the signals H and S. The signal H is generated by a voltage-controlled oscillator circuit, the control voltage of which is generated by a tuning control circuit as a function of the signal S.sub.1 when the frequency of the signal H is close in value to the desired frequency and as a function of the signal S.sub.3 when this is not the case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.