ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,717, issued on Jan. 13, was assigned to Allegro MicroSystems LLC (Manchester, N.H.).
"Closed loop magnetic field sensor with current control" was invented by Pablo Castro Lisboa (Montevideo, Uruguay).
According to the abstract* released by the U.S. Patent & Trademark Office: "Method and apparatus for a closed loop CAPS magnetic field sensor having an emitter coil current that corresponds to a distance from a target. An emitter coil drive circuit outputs an emitter current to an emitter coil for generating an emitter field and a reference coil drive circuit outputs a reference current to a reference coil for generating a reference field. The combined fields generate an applied fie...