CMOS reference voltage generator
US5963083A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1998 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Apr 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/247
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A CMOS voltage generator for providing a reference voltage VDD2 that will track the low level power supply voltage VDD (approximately 3.0V-3.6V) as long as the power supply is present. When VDD is not present (defined as at "hot pluggable" condition), the voltage generator is configured to maintain a "protection" output voltage less than the relatively high voltage (approximately 5V) that may appear along a circuit signal bus. In particular, the circuit includes at least a pair of diode-connected N-channel devices disposed between the signal bus line and the output voltage terminal to provide the necessary protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.