ALEXANDRIA, Va., July 7 -- United States Patent no. 12,676,581, issued on July 7, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).
"Outphasing amplifier" was invented by Takashi Sumiyoshi (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An outphasing amplifier includes first to fourth amplifiers, first and second impedance converters, a first matching circuit, a second matching circuit, a third matching circuit matching output impedance of first impedance converter with input impedance of third amplifier, a fourth matching circuit matching output impedance of second impedance converter with input impedance of fourth amplifier, and a combiner combining the first signal amplified b...