ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,451,844, issued on Oct. 21, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).
"Doherty amplifier" was invented by Yuji Komatsuzaki (Tokyo), Shuichi Sakata (Tokyo), Shintaro Shinjo (Tokyo) and Hiroshi Otsuka (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Doherty amplifier includes: a first amplifier to amplify a first signal as an auxiliary amplifier in a case where a frequency of each of the first signal and a second signal is a first frequency, and amplify the first signal as a main amplifier in a case where the frequency of each of the first signal and the second signal is a second frequency; a second amplifier to amplify the second signal a...