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    • 22. 发明授权
    • Noncontact IC card reader/writer
    • 非接触式IC卡读写器
    • US07182266B2
    • 2007-02-27
    • US10878633
    • 2004-06-29
    • Hiroshi YoshinagaFutoshi DeguchiMasahiko TanakaAkihiko HirataHiroaki Haruyama
    • Hiroshi YoshinagaFutoshi DeguchiMasahiko TanakaAkihiko HirataHiroaki Haruyama
    • G06K19/06
    • G06K7/0008
    • The object of the invention is to provide a small-sized noncontact IC card reader/writer that can enhance the efficiency of an amplifier at a low cost. To achieve the object, in the invention, a loop antenna that supplies electric power and a send signal to a noncontact IC card by electromagnetic induction and acquires a receive signal from the noncontact IC card by load fluctuation, a first resonance circuit for resonating the loop antenna with a desired first frequency, a radio transmitter that supplies electric power and send data to the loop antenna via the first resonance circuit and further, a radio receiver that acquires the receive signal from the loop antenna via a second resonance circuit connected to the loop antenna via a coupling capacitor and resonated with a desired second frequency are provided, the radio transmitter and the radio receiver are respectively connected to CPU, and a low-pass filter for removing a high frequency, a class E amplifier and a modulator are connected to the radio transmitter in series.
    • 本发明的目的是提供一种可以以低成本提高放大器的效率的小型非接触式IC卡读写器。 为了实现该目的,本发明是一种环形天线,其通过电磁感应向非接触式IC卡提供电力和发送信号,并通过负载波动从非接触IC卡获取接收信号,第一谐振电路使谐振回路 具有期望的第一频率的天线,经由第一谐振电路提供电力并向环形天线发送数据的无线电发射机,以及经由连接到该环路的第二谐振电路从环形天线获取接收信号的无线电接收机 天线通过耦合电容并以期望的第二频率谐振,无线电发射机和无线电接收机分别连接到CPU,并且用于去除高频的低通滤波器,E类放大器和调制器连接到 无线电发射机串联。
    • 23. 发明申请
    • Noncontact IC card reader/writer
    • 非接触式IC卡读写器
    • US20050029351A1
    • 2005-02-10
    • US10878633
    • 2004-06-29
    • Hiroshi YoshinagaFutoshi DeguchiMasahiko TanakaAkihiko HirataHiroaki Haruyama
    • Hiroshi YoshinagaFutoshi DeguchiMasahiko TanakaAkihiko HirataHiroaki Haruyama
    • G06K17/00G06K7/00H04B5/02G06K7/08
    • G06K7/0008
    • The object of the invention is to provide a small-sized noncontact IC card reader/writer that can enhance the efficiency of an amplifier at a low cost. To achieve the object, in the invention, a loop antenna that supplies electric power and a send signal to a noncontact IC card by electromagnetic induction and acquires a receive signal from the noncontact IC card by load fluctuation, a first resonance circuit for resonating the loop antenna with a desired first frequency, a radio transmitter that supplies electric power and send data to the loop antenna via the first resonance circuit and further, a radio receiver that acquires the receive signal from the loop antenna via a second resonance circuit connected to the loop antenna via a coupling capacitor and resonated with a desired second frequency are provided, the radio transmitter and the radio receiver are respectively connected to CPU, and a low-pass filter for removing a high frequency, a class E amplifier and a modulator are connected to the radio transmitter in series.
    • 本发明的目的是提供一种可以以低成本提高放大器的效率的小型非接触式IC卡读写器。 为了实现该目的,本发明是一种环形天线,其通过电磁感应向非接触式IC卡提供电力和发送信号,并通过负载波动从非接触IC卡获取接收信号,第一谐振电路使谐振回路 具有期望的第一频率的天线,经由第一谐振电路提供电力并向环形天线发送数据的无线电发射机,以及经由连接到该环路的第二谐振电路从环形天线获取接收信号的无线电接收机 天线通过耦合电容并以期望的第二频率谐振,无线电发射机和无线电接收机分别连接到CPU,并且用于去除高频的低通滤波器,E类放大器和调制器连接到 无线电发射机串联。