Sampling clock reproducing apparatus
US4303942A · kind A · utility
7Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Jun 2, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Improved sampling clock reproducing apparatus for receiving digital signal which is superimposed in the television signal during a vertical blanking interval. The sampling clock signal is made by selectively gating a pilot signal from the superimposed signal, obtaining a square thereof, then passing it through a resonance circuit with a resonance frequency twice a repetition frequency of the pilot signal. Thus, the sampling clock signal of the frequency twice the repetition frequency of the pilot signal is obtainable without digital processing attaining high durability against noises.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.