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在数字电路系统中,集成电路的错误通常分为两类;一类是逻辑错,一类是参数错。集成电路的任何输入或输出端可被“恒置0”或“恒置1”。例如:带两输入的与门的X_1端有“恒置1”错误时,用X_1与X_2作为输入,使得输出是X_2的值而不是X_1-X_2。这就是逻辑错。另外,短路和开路也被认为是逻辑错误。逻輯错通常是生产或使用时产生的。如果系统承受了高电压或高电流时也会导致逻辑错误。参数错是使电路参数的大小发生变化,从而改变了电压、电流或响应速度的工作特性。这些错误不能认为是逻辑错。通常这是
In the digital circuit system, integrated circuit error is usually divided into two categories; one is a logic error, the other is a parameter error. Any input or output of an integrated circuit can be “constant 0” or “constant 1”. For example, if there is a “constant 1” error at the X_1 end of an AND gate with two inputs, X_1 and X_2 are used as inputs so that the output is a value of X_2 instead of X_1-X_2. This is a logical mistake. In addition, shorts and opens are also considered logical errors. Logic errors are usually produced or used when generated. If the system is subjected to high voltage or high current can also cause a logic error. Parameter error is the size of the circuit parameters change, thus changing the voltage, current or response speed of the operating characteristics. These mistakes can not be regarded as logical wrong. This is usually