ALEXANDRIA, Va., June 17 -- United States Patent no. 12,316,329, issued on May 27, was assigned to Rohm Co. Ltd. (Kyoto, Japan).
"Zero-cross detection device and load driving system" was invented by Natsuki Yamamoto (Kyoto, Japan) and Satoru Nate (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A zero-cross detection device includes: an input terminal configured to receive an input voltage via a diode from an application terminal for an alternating-current voltage relative to a reference potential; an input circuit including a resistor between the input terminal and a terminal at the reference potential; a period detection circuit configured to detect the length of the period of the alternating-c...