F. Chau & Associates, LLC
Near field communication device, electronic system having the same and method of controlling power in near field communication device
A near field communication (NFC) device includes a resonance unit and an NFC chip. The resonance unit emits an electromagnetic wave to communicate data with an external NFC card in a reader mode. The NFC chip estimates a distance between the resonance unit and the external NFC card based on an antenna voltage generated by the resonance unit while the resonance unit emits the electromagnetic wave, and adjusts a magnitude of the electromagnetic wave based on the estimated distance.
SAMSUNG ELECTRONICS CO., LTD.
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G06K Y02D H04B H04W H04W H04W
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Chol-Su Jun-Ho Byeong-Hoon Il-Jong
Yoon Kim Lee Song