ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,882, issued on June 17, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Radio-frequency amplifier circuit" was invented by Takayuki Tsutsui (Kyoto, Japan) and Satoshi Tanaka (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A radio-frequency amplifier circuit includes a first amplifier transistor configured to amplify and output a radio-frequency signal supplied to a base of the first amplifier transistor, a first bias transistor that is connected to the first amplifier transistor to form a current mirror and configured to supply a bias to the base of the first amplifier transistor, a second bias transistor that is connecte...