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:
Dec. 23, 2003
Filed:
Jul. 30, 2001
Applicant:
Inventors:
Karl Schrödinger, Berlin, DE;
Jaro Stimma, Berlin, DE;
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/04 ;
U.S. Cl.
CPC ...
H03F 3/04 ;
Abstract
A temperature sensor has a first FET transistor circuit, whose operating point is located at the temperature-independent point, and a second FET transistor circuit whose operating point is above this point. The voltage difference in this case depends essentially linearly on the temperature. In addition, a circuit for controlling the gain of an amplifier circuit is provided, in which the current through the amplifier circuit at low temperatures is reduced by an appropriate control of the gate voltage of a transistor serving as a current source, so that an amplification which is substantially independent of temperature is carried out.