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:
Nov. 17, 2015
Filed:
Oct. 11, 2011
Michael Gueltig, Stutensee, DE;
Michael Gueltig, Stutensee, DE;
Abstract
Power source, in particular for use in a databus in public means of transportation, wherein the power source has a first transistor (T), and wherein in a normal operating mode of the power source the current (I) which is conducted through the first transistor (T) is determined by a first resistor (R) at the emitter of the first transistor (T), is characterized with respect to safe operation accompanied by the smallest possible space requirement and lowest possible manufacturing costs in that a temperature-dependent resistor (RV) is thermally coupled to the first transistor (T) and that the temperature-dependent transistor (RV) is connected to the power source in such a way that when the temperature of the first transistor (T) is rising the temperature-dependent resistor (RV) influences the voltage across the first resistor (R) and thereby brings about a reduction in the output current (I) of the power source.