Bandgap reference circuit
US8816756B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit for generating a temperature-stabilized reference voltage on a semiconductor chip includes a differential pair including a first and a second bipolar junction transistor. The circuit further includes a feedback circuit including an amplification stage and configured to control a current flowing through the first bipolar junction transistor and a current flowing through the second bipolar junction transistor. A first resistor is connected between an emitter of the first bipolar junction transistor and an emitter of the second bipolar junction transistor, thereby generating a PTAT voltage across the first resistor. Further, the circuit includes a current source forcing a partial current having a CTAT behavior through the first resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.