ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,887, issued on June 17, was assigned to REALTEK SEMICONDUCTOR Corp. (Hsinchu, Taiwan).

"Variable gain amplifier circuit and method having linearity compensation mechanism" was invented by Yang Chang (Hsinchu, Taiwan) and Chia-Jun Chang (Hsinchu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a variable gain amplifier circuit having linearity compensation mechanism is provided. A lower amplification transistor of a lower branch of an amplification circuit is controlled by an AC input signal. Upper amplification transistors of an upper branch generate an AC output signal at an amplification output terminal. An am...