Title:
RFIDタグ
Document Type and Number:
Japanese Patent JP5319469
Kind Code:
B2
Abstract:
The wireless tag includes a circuit which receives an AC signal from the outside and detects an envelope, a detection circuit which detects the level of electric power supplied from the outside and outputs a potential corresponding to the detected electric power, a protection circuit which changes an impedance of a circuit receiving the electric power in accordance with the electric power output from the detection circuit, a selection circuit portion which selects whether the electric power output from the detection circuit is input to the protection circuit.
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Inventors:
Yusuke Nishito
Application Number:
JP2009218276A
Publication Date:
October 16, 2013
Filing Date:
September 22, 2009
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G06K19/07; H04B5/02
Domestic Patent References:
| JP2008123502A | ||||
| JP2008515260A | ||||
| JP2004166391A |