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    • 1. 发明授权
    • System for recognizing of a device connection state by reading structure information data which produced by pull-up resistor and pull-down resistor
    • 通过读取由上拉电阻和下拉电阻产生的结构信息数据来识别器件连接状态的系统
    • US06658497B1
    • 2003-12-02
    • US09376482
    • 1999-08-18
    • Yusuke KawasakiShigeru HashimotoKoken Yamamoto
    • Yusuke KawasakiShigeru HashimotoKoken Yamamoto
    • G06F300
    • G06F13/4068
    • The present invention relates to a device connection state recognizing method capable of recognizing a connection state of devices without addition of signal lines dedicated to detection. Thus, in the method according to this invention, a portion of or all of a plurality of data signal lines are connected through pull-up resistors to a high electric potential or connected through pull-down resistors to a low electric potential in accordance with the connection state of the devices, and a processing unit reads, as structure information data, a high electric potential state/low electric potential state generated by the pull-up resistor/pull-down resistor in the portion of or all the plurality of data signal lines to recognize the connection state of the devices on the basis of the read structure information data. This invention is applicable to a various types of processing units which are to be connected through a common data bus to a plurality of devices.
    • 本发明涉及能够识别设备的连接状态而不添加专用于检测的信号线的设备连接状态识别方法。 因此,在根据本发明的方法中,多个数据信号线的一部分或全部通过上拉电阻器连接到高电位或通过下拉电阻器连接到低电位,根据 设备的连接状态,并且处理单元读取作为结构信息数据的多个数据信号的部分或全部由上拉电阻器/下拉电阻器产生的高电位状态/低电位状态 根据读结构信息数据识别设备的连接状态。 本发明可应用于通过公共数据总线连接到多个设备的各种类型的处理单元。
    • 10. 发明授权
    • Detection circuit for proximity IC card device
    • 接近IC卡设备检测电路
    • US06608995B1
    • 2003-08-19
    • US09503356
    • 2000-02-14
    • Yusuke KawasakiYoshiyasu SugimuraShigeru Hashimoto
    • Yusuke KawasakiYoshiyasu SugimuraShigeru Hashimoto
    • H04B500
    • H04B5/0012G06K7/0008
    • The present invention relates to a proximity IC card (PICC). More particularly, the present invention relates to and provides a detection circuit of a simple structure, which is easy to set up in a PICC and a proximity coupling device (PCD) for transmitting data to and receiving data from the PICC. This detection circuit is operative to detect a subcarrier signal sent from a PICC and superposed onto a carrier signal received through an antenna. Further, this detection circuit comprises a bias circuit for applying predetermined DC potential to a signal received from the antenna, a rectifier circuit for extracting a subcarrier signal superposed onto the carrier signal by rectifying a signal received from the antenna at a bias point, and an amplifier circuit for amplifying the subcarrier signal extracted at the bias point.
    • 本发明涉及一种接近IC卡(PICC)。 更具体地说,本发明涉及并提供一种简单结构的检测电路,其易于在PICC和邻近耦合器件(PCD)中建立,用于向PICC发送数据并从PICC接收数据。 该检测电路用于检测从PICC发送并叠加到通过天线接收的载波信号上的副载波信号。 此外,该检测电路包括用于对从天线接收的信号施加预定的DC电位的偏置电路,整流电路,用于通过在偏置点整流从天线接收的信号来提取叠加在载波信号上的副载波信号,以及 放大器电路,用于放大在偏置点处提取的副载波信号。