Method and apparatus for delay line control using receive data
US7400181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Nov 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0331
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for delay line control using receive data. A delay in a Delay-Locked-Loop circuit is controlled by obtaining a plurality of samples of one or more received signals for each unit interval; determining a data eye width in the one or more received signals; and adjusting a delay of at least one clock signal based on the data eye width. For example, the measured data eye width can be compared to a predefined value, such as a desired or ideal value. Generally, the delay is not adjusted in accordance with the present invention until the Delay-Locked-Loop circuit has reached a locked condition based on one or more predefined criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.