Low voltage differential swing (LVDS) signal driver circuit with low PVT and load sensitivity
US6600346B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 2002 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Jul 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/028
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A low voltage differential swing (LVDS) signal driver having substantially constant output differential voltage (Vod) and substantially constant output offset voltage (Vos) irrespective of variations in circuit fabrication processes, power supply voltages and operating temperatures (PVT), as well as circuit load conditions. A driver replica circuit which replicates a portion of the actual LVDS driver circuit conducts a driver replica operating current that is a scaled replica of the LVDS driver operating current. Operating voltages within the LVDS driver and driver replica circuits are monitored and controlled by bias voltages provided by the driver replica circuit. The desired scaling factor for the operating currents is ensured by appropriate scaling of the sizes of the circuit devices within the LVDS driver and driver replica circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.