ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,928, issued on June 17, was assigned to REALTEK SEMICONDUCTOR Corp. (Hsinchu, Taiwan).
"Level shifter" was invented by Chien-Hui Tsai (Hsinchu, Taiwan), Hung-Chen Chu (Hsinchu, Taiwan) and Yung-Tai Chen (Hsinchu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A level shifter can achieve a level shift by a wide margin. The level shifter includes a latch circuit, a protection circuit, and an input circuit. The latch circuit is coupled between a high-voltage terminal and the protection circuit. The protection circuit including a first protection transistor pair and a second protection transistor pair is set between the latch circuit and the inpu...