Method and circuit for producing thermally stable voltage and current references with a single band-gap stage
US6346849B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Jun 9, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A band gap reference stage includes a pair of transistors each having a conduction terminal and a control terminal, the control terminals of the transistors being connected together. A circuit is also included for causing substantially identical currents to pass through each of the pair of transistors. The circuit includes first and second resistors connected in series to a voltage reference. The conduction terminal of one of the pair of transistors is coupled to the voltage reference by the first and second resistors, the conduction terminal of the other of the pair of transistors is coupled to the voltage reference by the second resistor. The ratio of the first resistor to the second resistor defines a reference voltage substantially unchanged by a temperature variation on the control terminals of the pair of transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.