Fast start-up low-voltage bandgap voltage reference circuit
US6906581B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2003 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fast start-up low-voltage bandgap voltage reference circuit is disclosed. The bandgap voltage reference circuit includes: a first current generator, which is implemented by a self-bias unit and a current mirror for generating a first reference current with positive temperature coefficient; a second current generator, which is connected to a point with negative temperature coefficient in the first current generator to generate a second reference current with negative temperature coefficient; and a resistor for converting the first reference current and the second reference current into a low-voltage bandgap voltage independent of temperature. Because the bandgap voltage reference circuit of the invention uses the resistor to convert the first reference current and the second reference current into voltage, the circuit can provide low-voltage bandgap voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.