ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,224,712, issued on Feb. 11, was assigned to Rafael Microelectronics Inc. (Hsinchu County, Taiwan).

"Method of maximizing power efficiency for power amplifier system and power amplifier system thereof" was invented by Chung-Cheng Wang (Hsinchu, Taiwan), Kang-Ming Tien (Hsinchu County, Taiwan) and Tzu-Yun Wang (New Taipei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of maximizing power efficiency for a power amplifier system comprises obtaining a power supply voltage; determining a first voltage level sufficient for a power amplifier of the power amplifier system to output an output power; determining a second voltage level lower than t...