Multichannel common clock
US4433424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | May 11, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1403
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A clocking system is disclosed for a multichannel data transmission system which includes a temporary storage medium, such as magnetic tape. The system is an improvement over prior art systems which utilize a separate phase locked loop clock correction circuit for each channel. The described system utilizes a single clock for the multiple channels which operates at a frequency F that is an integral multiple of the channel baud rate. Means are provided to continually monitor the phase error of each channel and a composite correction signal is derived and applied to the clock signal which is proportional to the average of the phase errors of the individual channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.