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    • 4. 发明申请
    • Error detecting circuit
    • 错误检测电路
    • US20060005091A1
    • 2006-01-05
    • US10882523
    • 2004-06-30
    • Subhasish MitraKee KimTak MakPrashant Goteti
    • Subhasish MitraKee KimTak MakPrashant Goteti
    • G01R31/28
    • G01R31/318541G01R31/31816G01R31/318566G11C2029/3202
    • In one embodiment, an apparatus includes a datapath circuit to generate a data output signal in response to a data input signal and at least a first data clock signal; a shadow circuit, coupled to the datapath circuit, to generate a shadow output signal in response the data input signal and at least a second data clock signal during a functional mode of operation and to generate a scan-out signal in response to a scan-in signal and at least a first test clock signal during a test mode of operation; and an error detect circuit, coupled to the datapath and the shadow circuits, to generate an error signal in response to a mismatch between the data output signal and the shadow output signal.
    • 在一个实施例中,一种装置包括数据路径电路,用于响应于数据输入信号和至少第一数据时钟信号而产生数据输出信号; 阴影电路,耦合到数据路径电路,以在功能操作模式期间响应于数据输入信号和至少第二数据时钟信号产生阴影输出信号,并且响应于扫描信号产生扫描输出信号, 在测试操作模式期间的信号和至少第一测试时钟信号; 以及耦合到数据路径和阴影电路的误差检测电路,以响应于数据输出信号和阴影输出信号之间的失配而产生误差信号。
    • 6. 发明授权
    • System and shadow bistable circuits coupled to output joining circuit
    • 耦合到输出接合电路的系统和阴影双稳态电路
    • US07523371B2
    • 2009-04-21
    • US11218979
    • 2005-09-02
    • Subhasish MitraMing ZhangKee Sup Kim
    • Subhasish MitraMing ZhangKee Sup Kim
    • G01R31/28G06F7/02G06F13/00
    • G01R31/318536G01R31/318525
    • In one embodiment, an apparatus is provide with a combinational logic circuit to generate a data input signal; a delay element, coupled to the combinational logic circuit, to provide a delayed data input signal in response to the data input signal. Additionally, the apparatus is provided with a system bistable circuit, coupled to the combinational logic circuit, to generate a system bistable signal in response to at least the data input signal; a shadow bistable circuit, coupled to the delay element, to generate a shadow bistable signal in response to at least the delayed data input signal. Further, the apparatus is provided with an output joining circuit, coupled to the system and the shadow bistable circuits, to provide a data output signal in response to the system and the shadow bistable signals.
    • 在一个实施例中,设备提供组合逻辑电路以产生数据输入信号; 耦合到组合逻辑电路的延迟元件,以响应于数据输入信号提供延迟的数据输入信号。 另外,该装置设置有耦合到组合逻辑电路的系统双稳态电路,以响应于至少数据输入信号产生系统双稳态信号; 耦合到延迟元件的阴影双稳态电路,以响应于至少延迟的数据输入信号产生阴影双稳态信号。 此外,该装置设置有耦合到系统和阴影双稳态电路的输出接合电路,以响应于系统和阴影双稳态信号提供数据输出信号。