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where is the ground reference in rfid tags(NFC) ?

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lsfeng

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Hi,All

I'd like to ask what is actually gnd reference for RFID Passive tag (such as 13.56MHz NFC) ?



because there is no connection to the PCB or any physical ground, how to define the ground for the reference of the internal circuits ?

Do the tags need a very solid reference ground for the internal circuit design ?


Thanks in advance

Regards,

Lisong
 

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