SUPPRESSION OF EMI RADIATION IN EAS SYSTEM

摘要

An electronic article surveillance system (EAS) comprises a transmitter and a receiver. An amplifier is associated with the transmitter whereby non-linear signals are generated. A filter is provided for filtering the transmitted signal to reduce the strength of the harmonic content of the transmitted signal. A switch bypasses the filtering and turns off the transmitter to shorten ringing transient duration of the transmitted signal and thereby reduce interference at the receiver.