Precise and process-invariant bandgap reference circuit and method
US7230473B2 · kind B2 · utility
7Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 2005 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Aug 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage generation circuit generates a reference voltage using a bandgap reference. A countering circuit is included to adaptively counter for any deviations caused in a bandgap reference voltage such that the reference voltage is independent of fabrication process variations and changes in ambient temperature. In an embodiment, current, proportionate to deviation in absolute value of Vbe from a nominal value, is injected into an emitter-base junction to cause Vbe to equal the nominal value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.