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:
Feb. 07, 2017
Filed:
Jun. 26, 2015
Applicant:
Acco, Louveciennes, FR;
Inventors:
Assignee:
ACCO, Louveciennes, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 1/56 (2006.01); H03F 3/19 (2006.01); H03F 3/21 (2006.01); H04B 1/04 (2006.01); H04L 5/14 (2006.01);
U.S. Cl.
CPC ...
H03F 1/56 (2013.01); H03F 3/19 (2013.01); H03F 3/211 (2013.01); H03F 3/45076 (2013.01); H04B 1/0475 (2013.01); H04L 5/14 (2013.01); H03F 2200/451 (2013.01); H03F 2203/21142 (2013.01); H04B 2001/0408 (2013.01);
Abstract
An RF circuit for wireless devices comprises a single differential power amplifier and an impedance balancing circuit for each frequency band. The impedance balancing circuit serves both to provide an appropriate impedance at the output of the amplifier as the operating mode of the device changes, and also transforms the differential output of the amplifier to a single-ended output. The impedance balancing circuit optionally comprises a BALUN circuit and a variable capacitor that is varied as the operating mode changes in order to vary the impedance at the output of the amplifier.