Built-in eye scan for ADC-based receiver
US9800438B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Oct 25, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0087
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An example method of performing an eye-scan in a receiver includes: generating digital samples from an analog signal input to the receiver based on a sampling clock, the sampling clock phase-shifted with respect to a reference clock based on a phase interpolator (PI) code; equalizing the digital samples based on first equalization parameters of a plurality of equalization parameters of the receiver; adapting the plurality of equalization parameters and performing clock recovery based on the digital samples to generate the PI code; and performing a plurality of cycles of locking the plurality of equalization parameters, suspending phase detection in the clock recovery, offsetting the PI code, collecting an output of the receiver, resuming the phase detection in the clock recovery, and unlocking the equalization parameters to perform the eye scan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.