Trimmable bandgap voltage reference
US6501256B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Jun 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A trimmable bandgap voltage reference circuit includes variable current sources to drive variable currents through parallel combination circuits. The parallel combination circuits include variable resistors and diodes of differing sizes. Voltages developed across the parallel combination circuits are input to a differential amplifier that is used as a feedback amplifier to bias the variable current sources. The variable current sources and variable resistors can all be digitally controlled. A processor can query the operating point of the bandgap voltage reference circuit, and can also set the current and resistance values through a control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.