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Title:
NON-CONTACT COMMUNICATION MEDIUM, DRIVING METHOD THEREOF, AND RECORDING MEDIUM CARTRIDGE
Document Type and Number:
WIPO Patent Application WO/2019/198438
Kind Code:
A1
Abstract:
A non-contact communication medium according to an embodiment of the present technology is provided with a memory unit, a power generating unit, a power monitoring unit, and a capacity control unit. The memory unit stores predetermined management information. The power generating unit has: a resonance circuit which has an antenna coil and a resonance capacity unit having a variable capacity value; and a rectification circuit which rectifies a resonance output of the resonance circuit, and generates power to be supplied to the memory unit. The power monitoring unit has: a current adjusting element which is connected in parallel to the rectification circuit with respect to the resonance circuit and has a variable resistance value; a reference voltage generating source which generates a reference voltage; and an operational amplifier which controls the current adjusting element such that the output voltage of the rectification circuit becomes equal to the reference voltage. The capacity control unit is configured to control the resonance capacity unit on the basis of the output of the operational amplifier.

Inventors:
ONO, Kazutoshi (4-16-1 Okata Atsugi-sh, Kanagawa 21, 〒2430021, JP)
TERASHIMA, Toru (4-14-1 Asahicho Atsugi-sh, Kanagawa 14, 〒2430014, JP)
FUJITA, Hiroaki (4-14-1 Asahicho Atsugi-sh, Kanagawa 14, 〒2430014, JP)
NAKANO, Hiroaki (4-14-1 Asahicho Atsugi-sh, Kanagawa 14, 〒2430014, JP)
MAEDA, Hideo (4-16-1 Okata Atsugi-shi Kanagawa, 21, 〒2430021, JP)
SHIGYO, Nobuhiko (4-16-1 Okata Atsugi-shi Kanagawa, 21, 〒2430021, JP)
Application Number:
JP2019/011397
Publication Date:
October 17, 2019
Filing Date:
March 19, 2019
Export Citation:
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Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORPORATION (4-14-1 Asahi-cho, Atsugi-shi Kanagawa, 14, 〒2430014, JP)
International Classes:
G06K19/07; G06K19/077; G11B23/087; G11B23/30; H02J50/12; H04B5/02
Foreign References:
JP2010079451A2010-04-08
JPH10145987A1998-05-29
JP2004229076A2004-08-12
JP2011034631A2011-02-17
JPH10187916A1998-07-21
Attorney, Agent or Firm:
OMORI, Junichi (2nd Floor, U&M Akasaka Bldg. 7-5-47 Akasaka, Minato-k, Tokyo 52, 〒1070052, JP)
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