Title:
非接触通信媒体及びそれを用いた電子機器
Document Type and Number:
Japanese Patent JP6739190
Kind Code:
B2
Abstract:
A contactless communication medium, includes: a coil sensitive to a magnetic field; a rectifying circuit configured to rectify an alternating power energy generated in the coil; a smoothing circuit configured to smooth a rectified output outputted from the rectifying circuit to generate a DC voltage; an output terminal connected to the smoothing circuit; a voltage detecting circuit configured to compare an output voltage extracted from the output terminal with a reference voltage; a switch configured to operate in response to an output from the voltage detection circuit and to attenuate the alternating power energy generated in the coil when the output voltage reaches a predetermined value; and a load connected to the output terminal, wherein impedance of the load has a value such that the output voltage has a predetermined value when an effective value of the magnetic field applied to the coil is 12 A/m or more.
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Inventors:
Yoshii Yusuke
Application Number:
JP2016038988A
Publication Date:
August 12, 2020
Filing Date:
March 01, 2016
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H04B5/02; G06K19/07; H02J50/12
Domestic Patent References:
| JP2011197818A | ||||
| JP2006268883A | ||||
| JP2008276554A | ||||
| JP2013172490A | ||||
| JP9153744A |
Foreign References:
| WO2002007173A1 | ||||
| US20130099591 |
Attorney, Agent or Firm:
Sano patent office