Voltage/current mode TIA/EIA-644 compliant fast LVDS driver with output current limit
US6369621B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Mar 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0292
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A fast voltage differential signaling (LVDS) transceiver (50) having high repeater speeds up to 1.36 GBps, and also meeting the TIA/EIA-644 standard short-to-ground requirements. A mixed voltage-current mode differential driver has a respective control signal (A3) driving each of the drive transistors (Q3). The control signal (A3) is controlled by a transistor (M1) being a function of current through the respective drive transistor (Q3). A current mirror (Q4, Q5, Q6) is used to mirror current conducting through a transistor (Q4) in parallel with the drive transistor (Q3), which mirror current is compared against a current reference (Iref).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.