NON-CONTACT COMMUNICATION MEDIUM AND ELECTRONIC APPARATUS USING THE SAME

• Main Author: YOSHII YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2017
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; GENERATION; HANDLING RECORD CARRIERS; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSMISSION

PROBLEM TO BE SOLVED: To provide a non-contact communication medium that prevents reception voltage exceeding a certain value from occurring by operating an attenuation circuit for attenuating magnetic field energy if it is exposed to a strong magnetic field.SOLUTION: A non-contact communication medium 100 includes a coil 10, a rectifying circuit 20, a smoothing circuit 30, load impedance adjusting means 40, a voltage detection circuit 50, and a switch 60. A resistance value of the load impedance adjusting means 40 is adjusted so that output voltage Vo becomes prescribed output voltage Vout when a magnetic field of 12 A/m or more is applied to the coil 10. When the output voltage Vout reaches a prescribed value, the voltage detection circuit 50 operates the switch 60 and stops the resonance of the coil 10 or shifts the resonance frequency of the coil 10.SELECTED DRAWING: Figure 2 【課題】強磁界に曝された場合に、磁界エネルギーを減衰させる減衰回路を動作させることにより、一定値を超える受信電圧の発生が防止される非接触通信媒体を提供する。【解決手段】非接触通信媒体１００は、コイル１０、整流回路２０、平滑回路３０、負荷インピーダンス調整手段４０、電圧検出回路５０、及びスイッチ６０を含む。負荷インピーダンス調整手段４０の抵抗値は、コイル１０に１２Ａ／ｍ以上の磁界が印加された場合に出力電圧Ｖｏが所定の出力電圧Ｖｏｕｔになるように調整される。出力電圧Ｖｏｕｔが所定の値になると、電圧検出回路５０がスイッチ６０を動作させ、コイル１０の共振を停止させるか、又はコイル１０の共振周波数をずらす。【選択図】図２