ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,463,621, issued on Nov. 4, was assigned to NUVOTON TECHNOLOGY Corp. (Hsinchu, Taiwan).

"Equivalent series resistance compensation circuit, constant-frequency turn-on circuit and voltage conversion device" was invented by Chun Hsin Liu (Zhubei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ramp voltage signal generated by an equivalent series resistance compensation circuit in prior art is not linear, and average amplitude and maximum amplitude of the ramp voltage signal changes with an input voltage and a turn-on time. It results in a comparison result or compensation value generated by a comparator of the constant-frequency turn-on circuit wil...