Circuits and methods for providing a bandgap voltage reference using composite resistors
US6342781B1 · kind B1 · utility
11Cited by
24References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2001 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Apr 13, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bandgap voltage reference circuit includes a current source and a bipolar transistor that are coupled together such that current from the current source passes through the bipolar transistor to a low voltage source such as ground. A composite resistor is coupled in series between the current source and the bipolar transistor. The composite resistor of this voltage reference leg of the circuit is composed of at least two component resistors that may be fabricated so as to adjust the temperature coefficient of the bandgap voltage reference as a whole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.