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    • 1. 发明授权
    • Method and apparatus for calculating delay times in semiconductor circuit
    • 用于计算半导体电路中的延迟时间的方法和装置
    • US06389381B1
    • 2002-05-14
    • US09037063
    • 1998-03-09
    • Masahito IsodaTakashi YonedaRieko Suzuki
    • Masahito IsodaTakashi YonedaRieko Suzuki
    • G06F9455
    • G06F17/5022
    • A method and apparatus for calculating circuit delay times efficiently arranges and stores data to reduce system memory requirements, which allows computers without large storage devices, such as conventional personal computers with limited hard disk space, to be used for testing preliminary device designs, Delay time ratio coefficient values representing a ratio of a delay time determined by values of dependency factors having a large correlation with one another to a predetermined reference delay time of a circuit element are stored in a coefficient table. The dependency factors include process condition, in use or operational temperature, and first and second operational supply voltages.
    • 用于计算电路延迟时间的方法和装置有效地布置和存储数据以减少系统存储器要求,这允许没有大容量存储设备的计算机(诸如具有有限硬盘空间的传统个人计算机)用于测试初步设备设计,延迟时间 比例系数值表示由电路元件的预定参考延迟时间彼此相关大的依赖因子的值确定的延迟时间的比率存储在系数表中。 依赖因素包括工艺条件,使用中或工作温度以及第一和第二工作电源电压。