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:
Jan. 30, 2018
Filed:
Apr. 26, 2016
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Assignee:
MediaTek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/04 (2006.01); H03F 1/02 (2006.01); H03F 1/56 (2006.01); H03F 3/189 (2006.01); H03F 1/08 (2006.01); H03F 3/195 (2006.01); H03F 3/21 (2006.01); H03F 3/213 (2006.01); H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
H04B 1/0458 (2013.01); H03F 1/0277 (2013.01); H03F 1/08 (2013.01); H03F 1/56 (2013.01); H03F 3/189 (2013.01); H03F 3/195 (2013.01); H03F 3/211 (2013.01); H03F 3/213 (2013.01); H03F 3/45071 (2013.01); H03F 2200/387 (2013.01); H03F 2200/451 (2013.01); H03F 2200/541 (2013.01); H03F 2203/21139 (2013.01); H03F 2203/45228 (2013.01);
Abstract
An amplifier circuit that includes a first power amplifier configured to drive a load and a second power amplifier configured to drive the load through an impedance step-up network. The impedance step-up network is connected to an output of the second power amplifier. The impedance step-up network is configured to switch into a first mode to present an increased impedance to the first power amplifier, and switch into a second mode in which the impedance step-up network steps-up an impedance seen by the second power amplifier looking into the impedance step-up network.