METHOD FOR LIMITING THE LEVEL OF VOLTAGE FROM A MAGNETIC FIELD RECEIVED BY A TRANSPONDER AND CORRESPONDING TRANSPONDER

摘要

Transponder (TG), configured to communicate without contact with a reader (RD), comprising an integrated circuit, an antenna and a rectifier circuit (RED) comprising two transistors (M0, M1) cross-coupled between the terminals (AC1, AC2 ) of the antenna and a reference terminal intended to receive a reference voltage, and control means (CD) capable of, during a communication between the reader (RD) and the transponder (TG), controlling the voltages of the gate of the transistors (M0, M1) so as to modify the input impedance of the integrated circuit.