The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2010
Filed:
Jun. 04, 2007
Alberto Ferro, Preganziol, IT;
Alberto Ferro, Preganziol, IT;
OSRAM Gesellschaft mit beschraenkter Haftung, Munich, DE;
Abstract
A current generator arrangement for use, e.g., in 1-10V interfaces for lighting systems, includes at least one transistor (Q) having a base-emitter junction wherein the voltage drop across the base-emitter junction defines the intensity of the output current and wherein the base-emitter junction is exposed to temperature drift. A resistive network (R) is coupled to the transistor (Q), whereby the intensity of the output current is a function of both the voltage drop across the base-emitter junction of the transistor (Q) and the resistance value of the resistive network (R). The resistive network (R) includes at least one resistor element (NTC; NTC) whose resistance value varies with temperature to keep constant the intensity of the output current irrespective of any temperature drift in the voltage drop across the base-emitter junction of the transistor (Q).