Patent ID: 7148804
Filing Date: 2006-12-12
Classification: G08B

Abstract:
1. A system for detecting a first signal from an electronic article surveillance (EAS) resonant circuit tag that is tuned to a frequency in an EAS frequency band and a second signal from a radio frequency identification (RFID) tag that is tuned to a frequency in an RFID frequency band, said system comprising: a transmitter for emitting said transmit signal, said transmit signal comprising a carrier signal of a frequency in said RFID frequency band and that is amplitude modulated for sending commands to the RFID tag, said transmit signal comprising modulation edges that cause said EAS tag to emit said first signal when said transmit signal impinges on said EAS resonant circuit tag; a first receiver, tuned to a frequency in said EAS frequency band, for receiving said first signal, said first signal comprising the natural response of said EAS resonant circuit; and a second receiver, tuned to a frequency in said RFID frequency band, for receiving said second signal.