NFC TRANSPONDER ASSEMBLY
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United States of America Patent
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Issued Date -
May 28, 2020
app pub date -
Jul 11, 2018
filing date -
Jul 20, 2017
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Abstract
An NFC transponder assembly includes an NFC communication unit and an antenna coil connected to the communication unit. The assembly draws energy from an electromagnetic field at the antenna coil via the antenna coil and establishes an NFC communication link with a data communication device via the antenna coil. A first switch is activated to activate the antenna coil. A second electric switch, parallel to the first switch, is open in the inactive state. The assembly closes the second switch after the first switch is actuated and keeps the second switch closed for a period of time after terminating the actuation of the first switch such that the antenna coil is activated for that period of time and ready to transmit data. The assembly opens the second switch after the period of time has expired such that the antenna coil is deactivated and no longer ready to transmit data.
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