Precision adaptive equalizer
US7688887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2004 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Dec 10, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/044
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In accordance with the teachings described herein, systems and methods are provided for a precision adaptive equalizer. A variable gain equalizer may be used to apply a variable gain to an input signal to generate an equalized output signal. A phase and pattern detector circuit may be coupled in a feedback loop with the variable gain equalizer. The phase and pattern detector circuit may be used to identify a high frequency data pattern in the equalized output signal and compare the high frequency data pattern with a clock signal to detect a high frequency phase error. The phase and pattern detector circuit may be further operable to generate an automatic gain control signal as a function of the high frequency phase error, the automatic gain control signal being fed back to the variable gain equalizer to control the variable gain applied to the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.