Bus termination voltage supply
US5856755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1996 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | May 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/227
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bus termination voltage supply. The invented voltage supply provides an output voltage from an input voltage using biasing and isolation circuits. A voltage isolation circuit couples an input voltage node to an output node to provide the output voltage. The isolation circuit includes a transistor driver element which is coupled to the input voltage node and the output node. The voltage supply also includes a biasing circuit having a voltage divider and a bias transistor. The voltage divider has a first voltage divider element coupling the output node to a voltage divider node. The voltage divider has a second voltage divider element coupling the voltage divider node to a second voltage supply node. The bias transistor couples a control input of the transistor driver element to the second voltage supply node under the control of a bias transistor control input coupled to the voltage divider node. The voltage supply may further include a feedback circuit comprising bias resistor which couples the input voltage supply to the driver control input. This voltage supply may be used to provide a termination voltage for a signal line in a computer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.