ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,334, issued on July 21, was assigned to Murata Manufacturing Co. Ltd. (Kyoto, Japan).
"Power amplifier circuit" was invented by Yuri Honda (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power amplifier circuit includes a first amplifier that operates in accordance with a first voltage supplied from a voltage supply source, amplifies a first signal, and outputs an amplification signal, a bias transistor that includes a base or a gate to which a bias control current is supplied and an emitter or a source supplying a bias to the first amplifier through a first resistor element, and a protection circuit that causes part of the bias contr...