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:
Apr. 04, 2006
Filed:
Sep. 07, 2004
Joerg Vollrath, Olching, DE;
Marcin Gnat, München, DE;
Ullrich Menczigar, Vaterstetten, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A differential amplifier circuit has two input transistors, a load element, and a current source. A terminal for an input voltage is connected to a control terminal of a first input transistor. A terminal for a reference voltage is connected to a control terminal of a second input transistor. The two input transistors are connected in parallel between the load element and a terminal of the current source. A terminal for an internal reference potential is connected to a further terminal of the current source. A regulating circuit, is connected to the terminal for the voltage and to the terminal for the reference potential, and regulates the potential of the circuit dependent on changes in the reference voltage. Fluctuations of the reference voltage are compensated by regulation of the internal reference potential. As a result, the operating point of the circuit is stabilized independently of fluctuations of the reference voltage.