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~~1 设电路有m个支路、n个结点,则利用克希荷夫第二定律能够而且只能够列出k=m-n+1个线性无关的方程式。本文叙述了一个基本的证明方法。这个方法不仅可用于电路,也可用于任何形状的任何网状结构。另一方面,这个方法可以实际地应用,以便较容易地选取复杂电路的独立回路。 In this paper a special computer language ZB-761 is presented. This language is tailored to produce photo-masks for LSI circuits. Most part of the paper is devoted to explain the structure of source language of ZB-761 in an intuitive way. No formal syntax formula will be dealt with. The flow chart of the compiler of ZB-761 is briefly discussed. The formal syntax formula is mentioned in the appendix. 本文提出一种专用计算机语言-ZB761,该语言为生产大规模集成电路光刻掩膜而设计。本文主要直观地介绍ZB-761的源语言结构,而不引用形式语法公式。文中还简单地叙述了ZB-761编译程序的流程图。附录中给出了形式语法公式。 As a part of the LSI CAD, a software for CAD photomask-ZB-761 was designed and put into use on a DJS-130 computer in 1976. Since then several dozens of IC photomasks have been made. The input language of software has better ability to describe IC mask graph. The data structure is so designed that it enables a minicomputer without an external memory, such as a DJS-130 computer, to handle the vast data of mask graph. By optimizing the object program the working time of specific photomask equipment is greatly... As a part of the LSI CAD, a software for CAD photomask-ZB-761 was designed and put into use on a DJS-130 computer in 1976. Since then several dozens of IC photomasks have been made. The input language of software has better ability to describe IC mask graph. The data structure is so designed that it enables a minicomputer without an external memory, such as a DJS-130 computer, to handle the vast data of mask graph. By optimizing the object program the working time of specific photomask equipment is greatly reduced. It also has the ability to check data and to perform manmachine dialogue to a certain extent. In this paper, the particular features of input language, data structure, transformation algorithm of the compiler and optimization for the object program etc. are described in some detail. The schemes of the implementation of LSI mask design automation are also suggested. 计算机辅助制版软件ZB-761是作为大规模集成电路计算机辅助设计的一个组成部分而设计的,且于1976年在DJS-130计算机上投入运行。至今已制作了数十套集成电路掩膜版。 软件的输入语言具有较强的描述集成电路版图的能力。其数据结构使得像DJS-130这样的小型计算机(没有外存贮器)能处理大量的版图数据。由于进行了目标程序的优化,使得专用制版设备的制版时间大大地缩短了。另外,软件还具有一定的数据检查和人机对话的能力。 本文较详细地介绍了软件输入语言的特点,数据结构,编译中的变换算法和目标程序的优化等。并对大规模集成电路版图设计自动化提出了一些设想。
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