ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,431,844, issued on Sept. 30, was assigned to NXP B.V. (Eindhoven, Netherlands).
"Antenna tuning circuit for an RFID transponder" was invented by Davide Maschera (Lieboch, Austria) and Lukas Zoescher (Graz, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "An antenna tuning circuit is provided. The antenna tuning circuit includes an envelope detector, an operational amplifier, and a switch. The envelope detector is configured to track an envelope of a signal received at an antenna terminal. The operational amplifier includes a first input coupled to an output of the envelope detector to receive a first signal and a second input coupled to receive a...