ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,424,982, issued on Sept. 23, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Power amplifier circuit" was invented by Takashi Soga (Kyoto, Japan) and Tsutomu Oonaro (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power amplifier circuit includes: a transistor which is supplied at a base with a bias current, amplifies an input signal, and outputs a current; a transistor which is connected at a base to the base of the transistor and in which a current commensurate with the current is input to a collector; a transistor which outputs a bias control signal which controls supply of the bias current; and a control circuit which i...