Matching transmitter impedance to receiver termination using an average of transmitter output voltage samples
US10659258B1 · kind B1 · utility
2Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2018 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Nov 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03343
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus to adjust a differential transmitter output impedance is disclosed. Output voltage is sampled and averaged to mitigate noise and leakage. Averaged uplevel and downlevel voltages are used to select a number of pullup devices and a number of pulldown devices to control the differential transmitter output impedance to match a distal termination resistance or a transmission line impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.