Current source with internal variable resistance and control loop for reduced process sensitivity
US6445170B1 · kind B1 · utility
9Cited by
18References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Oct 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A current reference with reduced sensitivity to process variations includes two current sources. The first current source has an output current that is sensitive to process variations. The second current source has, as a component of its input current, the output current of the first current source. The input current to the second current source is substantially constant because the process dependent component has been removed by the output current of the first current source. Variable resistors internal to the current source are set using a control loop circuit and an external resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.