Method and apparatus for performing switched supply drive in CMOS pad drivers
US5847575A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1996 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Jun 21, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00361
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A driver circuit for limiting electrical noise on a quiescent signal is provided which includes a Transition High Driver circuit, a Transition Low Driver circuit, a Quiescent High Driver circuit, and a Quiescent Low Driver circuit. The driver circuit comprises means for driving an electrical signal with a presumed noisy Transition Power Supply network while it is transitioning from a low voltage level to a high voltage level or vice versa. The signal is driven by the Transition Power Supply network until the electrical signal reaches its quiescent voltage level. At this time, the signal is no longer driven by the Transition Power Supply network but rather by a presumed clean Quiescent Power Supply network. In this manner, noise from transitioning signals is prevented from coupling onto quiescent signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.