Device having temperature compensation for providing constant current through utilizing compensating unit with positive temperature coefficient
US7504878B2 · kind B2 · utility
5Cited by
19References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/567
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A device, having temperature compensation, includes a constant voltage provider for providing a constant voltage; and a compensating load coupled to the constant voltage provider for providing a resistive load to transform the constant voltage into a substantially constant current. The compensating load contains a resistor, having a negative temperature coefficient and coupled to the constant voltage; and a compensating unit, having a positive temperature coefficient and coupled in series to the resistor, for compensating a resistance variation of the resistor for a temperature variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.