ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,413,195, issued on Sept. 9, was assigned to RichWave Technology Corp. (Taipei, Taiwan).
"Gain-adjustable amplifier circuit" was invented by Chih-Sheng Chen (Taipei, Taiwan) and Ching-Wen Hsu (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An amplifier circuit includes an amplifier for generating an amplified input signal according to an input signal, and an attenuator circuit coupled to the amplifier. The attenuator circuit includes an input terminal for receiving the input signal or the amplified input signal, an output terminal, a reference voltage terminal, a zeroth resistor-switch circuit, a first resistor-switch circuit, and a secon...