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:
Jul. 19, 2005
Filed:
Dec. 05, 2001
Stephan Mechnig, Munich, DE;
Markus Schimper, Moosinning, DE;
Ralf Schledz, Zolling, DE;
Infineon Technologies AG, Munich, DE;
Abstract
The invention relates to a circuit for low noise, fully differential amplification. A feedback signal () is detected in a differential output step of the differential amplification circuit by means of a voltage distributor formed by a first feedback resistance () and a second feedback resistance (). A first output signal () is provided at a first output circuit node () and a second output signal () is provided at a second output circuit node (). The respective first and second output signals () or () form a full output signal which corresponds to an input signal formed by a first and a second input signal () or (). A load current (), an input current () and a reference current () are established by means of a load current source (), an input current source () and a reference current source (). A matching transistor () is used to adjust an adaptation between the load current source (), the input current source () and the reference current source (). A feedback signal () of the differential amplification circuit is compared with a reference voltage () in a reference step, and the load current () is mirrored in the differential input step, in a current mirror device.