Transponder mit einem Modulator

Details

Veröffentlichungs-Nr.

EP2528023

Aktenzeichen

EP12168059

Anmeldetag

15. Mai 2012

Veröffentlichung

22. Juli 2015

Erteilung

22. Juli 2015

Rechtsraum

EP

IPC

G06K19/07H01L29/78

Abstract

The RFID transponder of the invention comprises an electronic circuit and an antenna, the electronic circuit being integrated in a p-type substrate and comprising a modulator (32) formed by a PMOS transistor whose drain, electrically connected to a pad (Ant) of the antenna, and source, connected to the ground (Gnd) of the electronic circuit, are arranged in an n-type well provided in the p-type substrate. The PMOS transistor has a gate (40) driven by a driving circuit which is arranged for providing at least a negative voltage, this negative voltage being low enough for turning on this PMOS transistor in response to a control signal (Tx) provided by a logical unit of the electronic circuit. In particular, the driving circuit comprises an inverter (50) followed by a high-pass filter formed by a series capacitor (52), connected to the gate of the PMOS transistor, and a parallel diode (54) connected between this gate and the ground, this driving circuit further comprising a current source (56) arranged between a positive supply voltage (Vdd) and the diode together with a switch (58) controlled so that it turns off when the modulator is turned on.

Anmelder

Firma

EM Microelectronic-Marin SA

Land

🇨🇭 Schweiz

Fachgebiete