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:
May. 13, 2025
Filed:
Jul. 19, 2022
Applicant:
Hahn-schickard-gesellschaft Fuer Angewandte Forschung E.v., Villingen-Schwenningen, DE;
Inventors:
Assignee:
Hahn-Schickard-Gesellschaft fuer angewandte Forschung e.V., Villingen-Schwenningen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); G05F 3/26 (2006.01); H03F 1/30 (2006.01);
U.S. Cl.
CPC ...
H03F 3/45636 (2013.01); G05F 3/262 (2013.01); H03F 1/30 (2013.01); H03F 3/45183 (2013.01); H03F 2203/45286 (2013.01); H03F 2203/45462 (2013.01);
Abstract
The present invention relates to an operational amplifier, including: a symmetrical differential amplifier; a local common mode feedback circuit coupled to the symmetrical differential amplifier; a tail current source circuit including at least one first transistor and a second transistor and a current source resistor. The tail current source circuit is configured to adjust a control voltage of the first transistor by using the second transistor such that a predetermined reference current flows through a load path of the first transistor.