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    • 17. 发明授权
    • Real time comparison of integrated circuit operation
    • 集成电路运行的实时比较
    • US5948111A
    • 1999-09-07
    • US271238
    • 1994-07-06
    • Mark A. TaylorDavid J. GarciaPaul A. Duffy
    • Mark A. TaylorDavid J. GarciaPaul A. Duffy
    • G06F1/12G06F11/16H03D13/00H03K5/26G06F11/00
    • H03K5/26G06F1/12G06F11/1679H03D13/004G06F11/1654G06F11/1695
    • A pair of substantially identical integrated circuit elements, in the form of microprocessors, are operated in response to the same instruction and data signals that are accessed from a memory by one of the integrated circuits. The accessed instruction and data signal are supplied, via a synchronous interface, to the second integrated circuit, which operates thinking that the supplied data and instruction signals were accessed by it in response to address and control signals. The states of the two integrated circuits are applied to comparator circuitry, both via buffered paths. The comparator circuitry is operated in response to control signals produced by the first integrated circuit to effect comparison on only those signals that are valid at any particular moment in time. Clock-synchronizing circuitry is included to ensure that predetermined state transitions of the clocks used to operate the first and second integrated circuit occur within a prescribed time period.
    • 微处理器形式的一对基本上相同的集成电路元件响应于由集成电路之一从存储器访问的相同指令和数据信号而被操作。 所访问的指令和数据信号通过同步接口被提供给第二集成电路,该第二集成电路操作认为所提供的数据和指令信号是由其响应于地址和控制信号而被访问的。 两个集成电路的状态通过缓冲路径应用于比较器电路。 比较器电路响应于由第一集成电路产生的控制信号进行操作,以仅对在任何特定时刻有效的那些信号进行比较。 包括时钟同步电路以确保用于操作第一和第二集成电路的时钟的预定状态转换在规定时间段内发生。