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电子学报  2013 

一种可应用于并发在线测试的扫描单元设计

DOI: 10.3969/j.issn.0372-2112.2013.09.033, PP. 1869-1872

Keywords: 扫描链,扫描单元,在线测试,测试向量,冗余

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Abstract:

航天等领域对集成电路可靠性要求较高,要求其具有在线测试功能,以便及时发现故障,减少损失.结合现有扫描设计方法,设计了一种改进的扫描单元结构.将该扫描单元应用于时序电路后,能够在电路工作的同时进行测试;通过灵活的时钟选择机制,方便地控制电路进行非并发和并发测试.仿真实验表明,应用本文提出的扫描单元,时序电路能够在增加一定硬件冗余的条件下实现在线测试,时间开销较小,有较高的可靠性和一定的容错能力,实用性强.

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