Method and apparatus for signal reception using ground termination and/or non-ground termination
US6856169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Aug 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Receiving units with inputs that may be ground-terminated and with inputs that are selectively ground-terminated or non-ground terminated are enabled with signal level shifting and a termination mode selection input. In a first exemplary implementation, a receiving unit is capable of having ground-terminated inputs. However, common mode voltage of the signal that is input to decoding data recovery circuitry is above ground because the input signal may be level shifted in between the ground-terminated inputs and the decoding data recovery circuitry. In a second exemplary implementation, a mode selection is accomplished by switching a voltage divider into operation and bypassing a level shifter for a non-ground terminated mode. For a ground terminated mode, the voltage divider is switched out of operation and the level shifter is switched into operation for its signal output to be decoded. Pre-amplification may also be employed to improve signal strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.