Output swing clamp for USB differential buffer
US5808481A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Jun 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/247
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The claimed invention is a driver circuit for transmitting data via an output node thereof to a transmission line. The driver circuit includes a first driving device coupled to the output node and a second driving device also coupled to the output node. The driver circuit also includes a clamping device coupled to the output node. The clamping device clamps the output node at a first predetermined voltage level. A termination device is coupled to the output node of the driver circuit. The termination device includes a triggering device and a termination path. The triggering device is coupled to the termination path such that the triggering device causes a current flow via the termination path when a voltage at the output node exceeds a second predetermined voltage level. The second predetermined voltage level is higher than the first predetermined voltage level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.