US Patent Issued to Rohm on June 23 for "Zero-crossing detection circuit" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,447, issued on June 23, was assigned to Rohm Co. Ltd. (Kyoto, Japan).

"Zero-crossing detection circuit" was invented by Satoru Nate (Kyoto, Japan), Akinobu Sawada (Kyoto, Japan) and Natsuki Yamamoto (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor integrated circuit device includes: a zero-crossing detection unit configured to compare a first monitoring target signal and a second monitoring target signal respectively input through diodes from a first node and a second node between which an AC signal is applied, so as to generate a comparison signal; a logic unit configured to count a period of the comparison signal and es...