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CARD DETECTION FOR A NFC (NEAR FIELD COMMUNICATION) READER SYSTEM

  • US 20200134270A1
  • Filed: 10/31/2018
  • Published: 04/30/2020
  • Est. Priority Date: 10/31/2018
  • Status: Abandoned Application
First Claim
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1. A method for operating a device that communicates via inductive coupling to detect an external tag device, the method comprising:

  • generating, by a Tx (transmitter) unit of the device, a transmitted signal to a matching network that sends the transmitted signal to an antenna, wherein the antenna and matching network receive data passed to a Rx (receiver) unit,wherein a Tx (transmitter) control unit of the device is configured for controlling the Tx (transmitter) unit of the device;

    sweeping through, by the Tx (transmitter) control unit of the device, a first output of the transmitted signal;

    monitoring, by the Tx control unit a second output of the transmitted signal based on the Tx control unit sensing the Rx (receiver) unit,wherein a change in the second output of the transmitted signal indicates detection of the external tag device.

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