Low voltage differential signal receiver and methods of calibrating a termination resistance of a low voltage differential signal receiver
US7315185B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2006 |
| Grant date | Jan 1, 2008 |
| Priority date | — |
| Expiry date | Jul 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0278
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A low voltage differential signal (LVDS) receiver includes a first receiving unit configured to receive a reference voltage and to responsively generate a first differential signal, and a second receiving unit configured to receive a voltage developed across a variable termination resistor unit having a resistance that is adjustable based on a resistance control code in response to a reference current, and to responsively generate a second differential signal. The LVDS receiver further includes a comparing unit configured to compare the first differential signal with the second differential signal and to responsively generate a counter control signal. The LVDS receiver further includes an up/down counter configured to adjust the resistance control code in response to the counter control signal. The up/down counter is further configured to provide the resistance control code to the variable termination resistor unit. Corresponding methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.