System and method for terminating a line by reflecting a scaled impedance
US6567472B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1999 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | May 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides a line termination circuit for matching the characteristic impedance of a transmission line, or more generally, a network. The present invention receives the voltage as present on the transmission line and attenuates it such that circuit components rated for lower voltages may be used to produce the reflected impedance. The attenuated voltage is placed across a scaled impedance which results in a reflected impedance substantially equal to the characteristic impedance of the transmission line. The line termination circuit uses a feedback loop to reflect the ground referenced scaled impedance across the transmission lines. The circuit generates a current having a value of one over the characteristic impedance of the network, which ensures that the reflected impedance, from the network, is substantially equal to the characteristic impedance of the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.