Patent ID: 11907794
Assignee: AVID IDENTIFICATION SYSTEMS, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A method for communicating with a radio frequency identification (RFID) transponder using a RFID reader, the RFID reader comprising a detector circuit, a plurality of active filter stages wherein, each of the active filter stages has a corresponding filter stage-muting switch as part of a feedback loop, and a detector-muting switch arranged between the detector circuit and the active filter stages, the method comprising:
transmitting a command signal from an RFID reader to the RFID transponder, the transmitting being performed while the detector-muting switch is closed to mute a signal from the detector circuit to the active filter stages, and while each of the corresponding filter stage-muting switches are closed;
after transmitting the command signal, opening the detector-muting switch based on an optimum timing determined by analytical circuit analysis;
after a settling time of the plurality of active filter stages, opening each of the filter stage-muting switches sequentially;
detecting, with the detector circuit while the detector-muting switch is open, a response signal transmitted by the RFID transponder in response to the command signal;
filtering the detected response signal using the active filter stages; and
demodulating, at the RFID reader, the filtered response signal to provide digital data received from the RFID transponder transmitted in the response signal.