ALEXANDRIA, Va., April 9 -- United States Patent no. 12,273,079, issued on April 8, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Power amplifier circuit, high frequency circuit, and communication apparatus" was invented by Kenji Tahara (Kyoto, Japan), Kenichi Shimamoto (Kyoto, Japan) and Yusuke Tanaka (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Increase in power-added efficiency can be achieved. A second base of a second transistor is connected to a first collector of a first transistor. A third base of a third transistor is connected to the first collector of the first transistor, and a third collector of the third transistor is connected to a second collector of the secon...