Method and apparatus for multi-level signaling adaptation with fixed reference levels
US11201768B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2021 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Feb 24, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/066
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to an adaptation method for data level (dLev) or data swing detection in a high-speed link system for multi-level (e.g. PAM-4) signaling. Provided are a receiver and a receiving method in which when a swing range of data received as an input is changed according to a channel condition, reference levels of data/swing detection samplers are not adaptively controlled, but the reference levels are fixed and a variable gain amplifier (VGA) is adaptively controlled for response to the change. Through the present disclosure, offset calibration of the data/swing detection samplers is more accurately performed and lower bit error rate (BER) is thus achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.