ALEXANDRIA, Va., June 10 -- United States Patent no. 12,294,336, issued on May 6, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Power amplifier circuit" was invented by Masakazu Hirobe (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power amplifier circuit includes an amplifier circuit, a bias circuit, a detector, and a control circuit. The amplifier circuit includes a first bipolar transistor. The bias circuit includes an emitter follower. The emitter follower includes a second bipolar transistor and supplies a bias current to the base of the first bipolar transistor. The detector detects the voltage of a power supply terminal connected to the collector of the first bipolar t...