Voltage-mode band-gap reference circuit with temperature drift and output voltage trims
US8791683B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2011 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Sep 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A monolithic voltage reference circuit may include a voltage-mode band-gap reference circuit, a temperature independent differential current source, and a temperature dependent differential current source. The voltage-mode band-gap reference circuit may include an error amplifier having differential input nodes. The temperature independent differential current source may be configured to add in or subtract from the differential input nodes a substantially temperature independent differential current with an allocation between the nodes that is controlled by a selectable output voltage trim setting. The temperature dependent differential current source may be configured to add in or subtract from the differential input nodes a substantially temperature dependent differential current with an allocation between the nodes that is controlled by a selectable temperature drift trim setting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.