Contactless integrated circuit with reduced power consumption; delivers pulse width modulated signal, whose duration is established in asynchronous manner by load or discharge of capacitor

摘要

The IC includes a load modulation circuit (LMC) for modulating a load of an antenna coil (Ls). A clock extraction device (CEC1) (HS) and a device for delivering a load modulation signal for transmitting a binary signal (DTx). A device (CC1) delivers a pulse width modulated signal, whose duration is established in an asynchronous manner by the load or a discharge of at least a capacitor (Cas).