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    • 1. 发明授权
    • Fault-detecting device for communication system
    • 通讯系统故障检测装置
    • US06538865B1
    • 2003-03-25
    • US09624845
    • 2000-07-25
    • Yuji NagataniKazuya IwamotoHiroshi Hashimoto
    • Yuji NagataniKazuya IwamotoHiroshi Hashimoto
    • H02H300
    • H04L25/08H04B3/46H04L1/24
    • A fault-detecting device used in a communication system and capable of judging correctly that a fault exerting an adverse effect with certainty on the transmission/reception operation has occurred in two-wire transmission lines. The fault-detecting device compares magnitudes between levels of information signals inputted through each of the two-wire transmission lines to obtain a resulting value as a main reception signal; compares magnitudes between a level of information signals inputted through each of the two-wire transmission lines and a first or second threshold value to obtain a resulting value as a first or second individual reception signal; determines a mismatch between the main reception signal and the first individual reception signal at a predetermined timing and generating a first mismatch detection signal when the mismatch has occurred; generates a first fault detection signal indicating a fault in the one of the two-wire transmission lines in accordance with a frequency of occurrence of the first mismatch detection signal; determines a mismatch between the main reception signal and the second individual reception signal at the predetermined timing and generating a second mismatch detection signal when the mismatch has occurred; and generates a second fault detection signal indicating a fault in the other one of the two-wire transmission lines in accordance with a frequency of occurrence of the second mismatch detection signal.
    • 在通信系统中使用的能够正确判断在发送/接收操作中发生不利影响的故障的故障检测装置已经在双线传输线中发生。 故障检测装置比较通过两线传输线中的每一条输入的信息信号的电平之间的大小,以获得作为主要接收信号的结果值; 比较通过两线传输线中的每一条输入的信号信号的电平与第一或第二阈值之间的幅度,以获得作为第一或第二单独接收信号的结果值; 在预定定时确定主接收信号和第一个体接收信号之间的失配,并且当发生失配时产生第一失配检测信号; 根据第一失配检测信号的发生频率,生成表示二线制传输线路中的一个故障的第一故障检测信号; 在预定定时确定主接收信号和第二单独接收信号之间的不匹配,并且当发生失配时产生第二失配检测信号; 并且根据第二失配检测信号的出现频率产生指示两线传输线中另一个的故障的第二故障检测信号。
    • 2. 发明授权
    • Communication controller for transferring data in accordance with the data type
    • 通信控制器,用于根据数据类型传输数据
    • US06397282B1
    • 2002-05-28
    • US09287485
    • 1999-04-06
    • Hiroshi HashimotoKazuya IwamotoYuji Nagatani
    • Hiroshi HashimotoKazuya IwamotoYuji Nagatani
    • G06F1326
    • H04L29/06027H04L29/06
    • A communication controller comprises a storage for storing data of a message being received, a determining unit for determining types of the message being received, and a transmission controller for generating interrupt requests for transferring data to a data processing unit at a different timing responsive to determination by the determining unit. That is, if the message being received requires immediate processing, the transmission controller immediately transmits an interrupt request signal to a CPU. The CPU then reads from the storage not only the data which require urgent processing but also all the data stored in the storage, and stores the data in its memory. If the message does not require immediate processing, the transmission controller transmits the interrupt request signal to the CPU when the data stored in the storage have reached a predetermined amount or when a predetermined time has elapsed from a time that the data began to be stored in the storage.
    • 通信控制器包括:存储器,用于存储正在接收的消息的数据;确定单元,用于确定正在接收的消息的类型;以及传输控制器,用于产生用于响应于确定的不同定时向数据处理单元传送数据的中断请求 由确定单元。 也就是说,如果接收到的消息需要立即处理,则传输控制器立即向CPU发送中断请求信号。 CPU然后从存储器读取不仅需要紧急处理的数据,而且读取存储在存储器中的所有数据,并将数据存储在其存储器中。 如果消息不需要立即处理,则当存储在存储器中的数据已经达到预定量时或者当从数据开始存储的时间起经过了预定时间时,传输控制器将中断请求信号发送到CPU 存储。
    • 3. 发明授权
    • Communication system
    • 通讯系统
    • US07154954B1
    • 2006-12-26
    • US09618848
    • 2000-07-18
    • Yuji NagataniKazuya IwamotoHiroshi Hashimoto
    • Yuji NagataniKazuya IwamotoHiroshi Hashimoto
    • H04B3/00H04L25/00
    • H04L25/0298H04L25/0272H04L25/0292
    • A communication system in which a reception signal can be accurately obtained from a signal transmitted over two-wire type transmission lines without any significant reduction in the communication speed. The communication system utilizing two-wire type transmission lines for transmitting transmission signals in opposite phases has a plurality of nodes connected to the two-wire type transmission lines, and each of the nodes incorporates terminating resistors acting upon the two-wire type transmission lines. A node which includes a reception circuit for receiving a transmission signal has an AC coupling circuit for extracting AC components in a transmission signal input through the transmission lines, a bias circuit for applying a bias voltage to a signal output from the AC coupling circuit and a clip circuit for clipping the level of a signal output from the bias circuit, which are provided at each of the two-wire type transmission lines.
    • 一种通信系统,其中可以从通过二线式传输线传输的信号准确地获得接收信号,而不会显着降低通信速度。 利用两线式传输线用于发送相反相位的传输信号的通信系统具有连接到两线式传输线路的多个节点,并且每个节点包括作用在两线式传输线路上的终端电阻器。 包括用于接收传输信号的接收电路的节点具有用于提取通过传输线输入的传输信号中的AC分量的AC耦合电路,用于向从AC耦合电路输出的信号施加偏置电压的偏置电路和 夹持电路,用于限制在每个双线型传输线路处设置的偏置电路输出信号的电平。
    • 4. 发明授权
    • Receiver circuit for a communication system
    • 用于通信系统的接收机电路
    • US06782055B1
    • 2004-08-24
    • US09618230
    • 2000-07-18
    • Yuji NagataniKazuya IwamotoHiroshi Hashimoto
    • Yuji NagataniKazuya IwamotoHiroshi Hashimoto
    • H04B300
    • H04B3/50
    • A receiver circuit that can obtain a reception signal with accuracy in high-speed communications using two-wire transmission lines. The receiver circuit receives information signals in a communication system with two-wire transmission lines for transmitting the information signals in opposite phases to each other. The receiver circuit includes an alternating-current coupling arrangement provided for each of the two-wire transmission lines and for extracting alternating-current components of the information signals inputted through the transmission lines. The receiver circuit also includes a reception signal generating arrangement for obtaining a reception signal corresponding to the information signals in accordance with output signals from each of the alternating-current coupling arrangements. Each of the alternating-current coupling arrangements include two time constant circuits having time constants different from each other and connected in parallel to each other between an input and output thereof.
    • 一种可以使用双线传输线在高速通信中准确获得接收信号的接收机电路。 接收机电路在具有双线传输线的通信系统中接收信息信号,用于彼此相反地发送信息信号。 接收器电路包括为两线传输线中的每一条提供的交流耦合装置,并用于提取通过传输线输入的信息信号的交流分量。 接收机电路还包括接收信号产生装置,用于根据来自每个交流耦合装置的输出信号来获得对应于信息信号的接收信号。 每个交流耦合装置包括两个时间常数电路,时间常数彼此不同,并在其输入和输出之间彼此并联连接。