Bandgap reference having power supply ripple rejection
US6294902A · kind A · utility
19Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Aug 11, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bandgap reference circuit provides an output reference voltage that is generally insensitive to fluctuations in supply voltage, ambient temperature, and output load current. A current regulator establishes an output whose variations are reduced, preferably logarithmically, relative to variations in a supply voltage. A bandgap generator fed by the output current provides an output reference voltage with similarly suppressed variations. A control amplifier biases the bandgap generator to provide a high level common-mode rejection of various error sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.