Apparatus and method for controlling the sampling clock in a data transmission system
US6714613B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2001 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Nov 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device and method for regulating a sampling rate in a digital data transfer system includes transmitting a synchronizing word used for receiver-side regulation of the sampling rate at regular time intervals. The received signal is filtered by a rate-regulating criterion filter and is simultaneously detected to recognize the synchronizing word. The initial value of the rate-regulating criterion filter controls an adjusting logic for the sampling rate once the synchronizing word is recognized. A rate is formed for the initial value of the rate-regulating criterion filter and the rate undergoes high pass filtering before it is fed to the adjusting logic. An apparatus for controlling the sampling includes a clock control criterion filter, an adjustment logic device, a switch, an apparatus identifying the synchronization word, a magnitude formation circuit, and a high-pass filter. The formation circuit and the high-pass filter are disposed between the criterion filter and the logic device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.