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. 30, 2014
Filed:
Mar. 16, 2012
Jeppe Korshøj Bendixen, Vrå, DK;
Ruediger Bauder, Feldkirchen-Westerham, DE;
Jeppe Korshøj Bendixen, Vrå, DK;
Ruediger Bauder, Feldkirchen-Westerham, DE;
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
A phase shifting stage is disclosed. The phase shifting stage includes first and second transistors. Second terminals of the first transistor and the second transistor are coupled to a first current tail node. A third transistor and a fourth transistor have second terminals that are coupled to a second current tail node. Also included is a first transformer having a primary winding with first and second inputs and a secondary winding. The first input is coupled to the first terminals of the first and third transistors, and the second input is coupled to the first terminals of the second and the fourth transistors. A common input stage having high power gain and phase commutating cascode stages in asymmetrical transformer output demultiplexing (ATODEM) branches is also provided. The common input stage limits the noise generated at an input stage by substantially canceling out the noise at an output transformer of the ATODEM.