ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,222,383, issued on Feb. 11, was assigned to DELTA ELECTRONICS INC. (Taoyuan, Taiwan).
"Insulation resistance detection circuit" was invented by Li-Ching Yang (Taoyuan, Taiwan), Wen-Lung Huang (Taoyuan, Taiwan) and Sheng-Hua Li (Taoyuan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An insulation resistance detection circuit is coupled to a positive end and a negative end of a DC power source, and is used to detect a positive insulation resistance between the positive end and a ground point and detect a negative insulation resistance between the negative end and the ground point. A detection unit sets a first estimated resistance and a second est...