Low voltage bandgap reference (BGR) circuit
US7170336B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2005 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Apr 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A low voltage bandgap reference circuit based on a current summation technique where reference voltages with positive and negative temperature coefficients are generated by a first circuit. These reference voltages are coupled to amplifying circuits which generate reference voltages with equal and opposite temperature coefficients based on the ratio of resistors in these amplifying circuits, thereby producing a temperature independent reference voltage. The current from each of these amplifying circuits is then summed in a summing resistor, where the size of the resistor determines the magnitude of the temperature independent reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.