ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,399,684, issued on Aug. 26, was assigned to Taiwan Semiconductor Manufacturing Co. Ltd. (Hsinchu, Taiwan).

"Low power adder tree structure" was invented by Chia-Fu Lee (Hsinchu, Taiwan), Po-Hao Lee (Hsinchu, Taiwan), Yi-Chun Shih (Taipei, Taiwan) and Yu-Der Chih (Hsin-Chu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In some aspects of the present disclosure, an adder tree circuit is disclosed. In some aspects, the adder tree circuit includes a plurality of full adders (FAs) including: a first subgroup of FAs, wherein each FA of the first subgroup includes a first number of transistors; and a second subgroup of FAs, wherein each FA of the secon...