Termination circuit for network interface unit
US7609817B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 2005 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Nov 30, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/055
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A network interface unit has an interface coupled to a first transmit line and a first receive line, and the interface is configured to receive a signal from the first receive line. The network interface unit further has circuitry operable in a test mode and a data mode that couples the received signal to the second transmit line via a first path while operating in the data mode. The circuitry further disables coupling of the signal to the second transmit line, couples the signal via an alternate path to the first transmit line, and creates a bias voltage about which a termination impedance for the second transmit line is centered while operating in test mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.