ALEXANDRIA, Va., May 19 -- United States Patent no. 12,633,920, issued on May 19, was assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD. (Hsinchu, Taiwan).

"Input buffer circuit having variable threshold circuits" was invented by Ryota Terauchi (Hsinchu, Taiwan), Yu-Kai Tsai (Hsinchu, Taiwan) and Chia-Jung Chang (Hsinchu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An integrated circuit includes an asymmetry upper threshold circuit outputting an upper-branch enabling signal, an asymmetry lower threshold circuit outputting a lower-branch enabling signal, and a control circuit which changes an output voltage when the logic levels of the upper-branch enabling signal and the lower-branch enabl...