ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,651, issued on Sept. 16, was assigned to Panduit Corp. (Tinley Park, Ill.).
"Absence of voltage detector" was invented by Masud Bolouri-Saransar (Orland Park, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An absence of voltage indicator has an isolation circuit, an FM modulator attached to the isolation circuit, a reference oscillator, and a mixer attached to the reference oscillator and the FM modulator, wherein the output of the mixer is the difference of the two signals. In one embodiment, the FM modulator includes a variable capacitor which varies in response to a voltage in parallel to a fixed capacitor and an inductor in parallel to the...