Voltage/current reference with digitally programmable temperature coefficient
US6222470A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit yielding a precise, programmable, finite temperature coefficient, in the form of either current or voltage, has been provided. Temperature independent and temperature dependent currents are manipulated through the use of digital to analog converters (DACs), with the sum of these currents representing the desired coefficient. The DACs are digitally programmable to provide the exact current required to meet a predetermined temperature coefficient. Electrical components requiring temperature compensation can be precisely controlled by supplying current at a known, predetermined temperature coefficient. A method of digitally programming a current or voltage having a predetermined finite temperature coefficient has also been provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.