ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,669, issued on May 19, was assigned to SOUTHEAST UNIVERSITY (Nanjing, China).

"Lossless exciting current sampling circuit for isolated converter" was invented by Qinsong Qian (Nanjing, China), Song Ding (Nanjing, China), Chunyan Nie (Nanjing, China), Yuanhang Zhou (Nanjing, China), Weifeng Sun (Nanjing, China) and Longxing Shi (Nanjing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lossless exciting current sampling circuit for an isolated converter includes first and second voltage sampling circuits and a subtraction circuit formed by an operational amplifier. The two sampling circuits sample voltages of the primary winding of an isolation ...