On-chip bathtub BER measurement for high-speed serdes diagnostics
US9444588B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jun 15, 2015 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03057
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for evaluating operation of a receiver comprising an analog front end, a plurality of samplers connected in parallel to the analog front end, the plurality of samplers comprising a plurality of utility samplers, a plurality of data samplers and a plurality of timing samplers, an unrolled decision feedback equalizer (UDFE) connected to outputs of the plurality of data samplers, and a serial input parallel out (SIPO) block connected to an output of the UDFE and outputs of the plurality of utility and timing samplers. The method comprises adjusting settings of the plurality of utility samplers to sweep across a range of interest, at each of a plurality of points comparing a selected output of one of the plurality of utility samplers at that point to an output of one of the plurality of data samplers to detect an error event, and, accumulating the error events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.