【作者】 李星；

【导师】 严晓浪； 葛海通；

【作者基本信息】 浙江大学 ， 电路与系统， 2004， 硕士

【摘要】 随着超大规模集成电路技术的飞速发展，集成电路技术更新换代的周期越来越短，设计工具的自动化称度也越来越高，而建库技术即成为设计自动化的基础。存储器的高速发展使得其在集成电路设计中举足轻重，其逻辑参数库的提取亦不可或缺，这就使得建库工作者快速提取存储器的逻辑参数成为必要。为了精确而快速地提取存储器逻辑参数，我们迫切需要自动化的软件，尽量减少建库过程中人为的影响因素，从而能够自动而快速地完成存储器的逻辑参数提取和建库工作。 然而，由于存储器单元密集和电路庞大的特点，并且存储器的增大极为迅速，使得用仿真工具直接提取逻辑参数并不现实，存储器的简化迫在眉睫。目前的参数提取测试电路由于和实际电路差别较大，也不能够精确地提取参数。而同时，目前逻辑参数库的更新工作大都是半自动的，需要人为地设计用于提取各种逻辑参数的单元电路的仿真激励波形，不但需要大量的人力物力，耗费大量的时间，而且容易引入人为的误差或错误，从而影响了逻辑参数库的质量。 针对以上问题，本文在研究已有建库技术的基础上，针对存储器的逻辑参数提取提出新的解决方案。参数提取前，在库参数精度受影响可忽略的前提下，对存储器先进行电路简化，使得存储器的提取自动化得以实现。同时，本文提出电压控制电压源的输入信号控制法，精确地反映了实际工作的情况。本文自动生成正确而又简练完备的激励波形，加快了参数提取的速度。更多还原

【Abstract】 With fast developing of ultra-large-scale-integrated-circuits technology, it’s update cycle is shorter and shorter. The library building technology has became the basic of design automation since the automation of design tools is more and more advanced. The fast growing of memory make it quite important for IC design. So quick parameter extraction is indispensable for memory. In order to extract the logic parameter of memory quickly and accurately, we need automatic tools to go on the parameter extraction and library building so as to reduce the man-made influence during the library building process.However, since memory circuit is very large and dense and the growing of its size is amazing, it is unpractical to extract the logic parameter directly with simulation tools. So it’s necessary for us to reduce the memory circuits. The current circuit under test for parameter extraction is different from the actual one, so the parameter extraction is far from accurate enough. Nowadays, most of the work of library building is semi-automatic and so much manual work is got in producing stimuli, the parameter extraction is time-consuming, and it will also introduce error or mistake frequently.Faced with these problems, this paper presents new methods for parameter extraction of memory on the base of current research about library building technology. On the precondition that the error is acceptable, we reduce the memory circuit before we do the logic parameter extraction so as to realize extraction automation. At the same time, VCVS(Voltage-Controlled-Voltage-Source) is presented in this paper to reflect the actual situation exactly. The input stimuli is produced accurately, completely and automatically, so that the parameter extraction is more fast.更多还原