Title:
NOTIFICATION RESPONSE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/241670
Kind Code:
A1
Abstract:
A notification response circuit is provided with: a reception coil that is capable of generating a current on the basis of an external electromagnetic field; a characteristic variable circuit that is connected to the reception coil and has at least two circuits among a variable capacitor circuit that has a plurality of capacitors and is capable of changing capacitance, a voltage output circuit that is capable of changing the voltage value between a pair of connection lines with the reception coil in accordance with the voltage value of a reference voltage, and a variable resistance circuit that has a plurality of resistors and is capable of changing the resistance value; and a switching control circuit that controls either the at least two circuits by selectively switching, and that changes impedance of the reception coil and the circuit portion connected to the reception coil.
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Inventors:
MORIOKA KENICHI (JP)
Application Number:
PCT/JP2020/020871
Publication Date:
December 03, 2020
Filing Date:
May 27, 2020
Export Citation:
Assignee:
LAPIS SEMICONDUCTOR CO LTD (JP)
International Classes:
H04B5/02; H02J50/10; H02J50/80; H04B1/59
Domestic Patent References:
| WO2014091934A1 | 2014-06-19 |
Foreign References:
| JP2013146182A | 2013-07-25 | |||
| JP2010102701A | 2010-05-06 | |||
| JP2007306240A | 2007-11-22 |
Attorney, Agent or Firm:
FUJIMURA Motohiko (JP)
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