ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,476,592, issued on Nov. 18, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Power amplifier" was invented by Kiichiro Takenaka (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power amplifier includes a 3-dB coupler which splits a first signal into a second signal and a third signal lagging behind the second signal by 90deg, a carrier amplifier, a peak amplifier, and a hybrid coupler. The carrier amplifier amplifies the second signal and outputs a fourth signal when the first-signal power level is a first level or higher. The peak amplifier amplifies the third signal and outputs a fifth signal when the first-signal power lev...