Impedance matching circuit
US6552565B2 · kind B2 · utility
46Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0278
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an impedance matching circuit for facilitating impedance matching between the characteristic impedance of a cable and the input impedance at the input terminal of a receiver for data transmission comprising: a first transistor, a second transistor, a resistor, a negative feedback control circuit, a multiplexer and a reference voltage generator. When the characteristic impedance of the cable varies, the equivalent resistance of the impedance matching circuit can be kept equal to the resistance of the varied characteristic impedance of the cable by adjusting the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.