Method and apparatus for determining a position of an offset latch employed for decision-feedback equalization
US7649933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Dec 1, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03057
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for determining a position of an offset latch employed for decision-feedback equalization. The position of an offset latch is determined by obtaining a plurality of samples of a data eye associated with a signal, the data eye comprised of a plurality of trajectories for transitions out of a given binary state; determining an amplitude of at least two of the trajectories based on the samples; and determining a position of an offset latch based on the determined amplitudes. The initial position of the offset latch can be placed, for example, approximately in the middle of the determined amplitudes for at least two of the trajectories. The initial position of the offset latch can be optionally skewed by a predefined amount to improve the noise margin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.