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    • 1. 发明授权
    • Signal input circuit and integrated circuit
    • 信号输入电路和集成电路
    • US08648610B2
    • 2014-02-11
    • US13304944
    • 2011-11-28
    • Yuuki MikamiToru ItabashiYoshiharu TakeuchiKenji MochizukiNaoya Tsuchiya
    • Yuuki MikamiToru ItabashiYoshiharu TakeuchiKenji MochizukiNaoya Tsuchiya
    • G01R31/00G01R31/08
    • G01D21/02G01D3/08G01R31/007
    • A signal input circuit includes: a signal input device having a signal input terminal; an inspection capacitor connected between the signal input terminal and a reference potential; a connection unit connecting/disconnecting an inspection path between the inspection capacitor and the signal input terminal; a charge and discharge unit charging/discharging the inspection capacitor; and a determination processing unit carrying out a terminal failure detection processing. The determination processing unit controls the connection unit to disconnect the inspection path and controls the charge and discharge unit to set the voltage of the inspection capacitor to a terminal inspection voltage in a charge and discharge procedure, controls the connection unit to connect the inspection path in a continuity establishing procedure, and detects the terminal failure at the signal input terminal or a communication path from the signal input terminal based on a voltage of the inspection path.
    • 信号输入电路包括:具有信号输入端的信号输入装置; 连接在信号输入端子和参考电位之间的检查电容器; 连接单元,连接/断开检查电容器和信号输入端子之间的检查路径; 充放电单元对检查电容器进行充放电; 以及执行终端故障检测处理的确定处理单元。 确定处理单元控制连接单元断开检查路径并控制充放电单元,以在充放电过程中将检查电容器的电压设置为终端检查电压,控制连接单元将检查路径连接到 连续性建立过程,并且基于检查路径的电压来检测信号输入端子处的端子故障或者来自信号输入端子的通信路径。