Patent · US Expired

Apparatus and method for generating a temperature insensitive reference current

US7110729B1 · kind B1 · utility

4Cited by
8References
20Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJan 22, 2003
Grant dateSep 19, 2006
Priority date—
Expiry dateOct 13, 2024

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG05F3/267
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A constant current source for generating a constant reference current that is relatively temperature insensitive. The constant current source comprises: i) first circuitry for generating a first output current that increases with increases in temperature; ii) second circuitry for generating a second output current that decreases with increases in temperature; and iii) a current combiner circuit that combines the first and second output currents to thereby generate the constant reference current. A change in the first output current caused by a temperature change is at least partially offset by a change in the second output current caused by the temperature change.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.