Timing signal synchronization device
US4352192A · kind A · utility
2Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2275
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device for the synchronization of a local timing signal to permit the demodulation of a differential phase-modulated carrier in synchronous data transmission systems. On the basis of a limited signal of the modulated carrier and a timing signal whose frequency is equal to quadruple that of the carrier, a logic element circuit comprising EXCLUSIVE-OR gates and synchronized flip-flops carries out a sequence of correlations and supplies pulses representative of the position of the phase jumps. These pulses are only used for the phase and frequency of the local timing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.