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Title:
MAGNETIC FIELD GENERATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/186408
Kind Code:
A1
Abstract:
This magnetic field generation circuit is provided with: a transformer antenna (At1) that includes a transformer (Tx1) including a primary coil (L1) and a secondary coil (L2), and a resonance capacitor (C1) connected in parallel to the secondary coil (L2) of the transformer, and generates a magnetic field; and an alternating-current power supply circuit (AC1, DC1, 10, 12, 14, 16) that supplies alternating-current voltage as drive voltage to the primary coil (L1) of the transformer antenna (At1). The resonance frequency of a parallel resonance circuit comprising the secondary coil (L2) and the resonance capacitor (C1) is set equal to the frequency of the alternating-current voltage supplied from the alternating-current power supply circuit (AC1).

Inventors:
KUROKAWA, Takashi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2018/014293
Publication Date:
October 11, 2018
Filing Date:
April 03, 2018
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H01Q7/06; H03K17/687
Domestic Patent References:
WO2015129460A12015-09-03
Foreign References:
JP2012169724A2012-09-06
JP2006041652A2006-02-09
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (AOYAMA & PARTNERS, Umeda Hankyu Bldg. Office Tower 8-1, Kakuda-cho, Kita-ku, Osaka-sh, Osaka 17, 〒5300017, JP)
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