Linguistic Description of Circuits Suitable for Symbolic Circuit Analysis.

为了用计算机分析电路，有必要用某种方法来描述电路。在数字电路的情况下，这对应于对电路中的每个节点进行编号并生成它们的系数矩阵。在获得系数矩阵之后，可以确定用于时域仿真的节点的可计算排序。通过这种模拟，可以很容易地计算出脉冲响应和任意节点间的传递函数，为了得到这些系数矩阵，可以建议直接从电路中求出。然而，在这种情况下，不可能通过将其划分为一些子电路来管理大规模电路，并且预计会出现描述的粗心错误。考虑到这些点，一般使用每个电路元件的枚举描述。该方法已在具有代表性的模拟电路分析程序Spice中采用。这种描述方法简单， ...更多信息 因为它只是简单地枚举了元素所连接的节点编号和元素值。本文提出了一种将数字电路描述为一种语言的方法，而不是简单地列举连接数据。该方法可以将整个电路描述为一个主电路和若干子电路的互连，将主电路处理为序数过程语言的一个主程序，将每个子电路处理为一个子程序。届时，各支路节点可独立命名，系统自动编号，无需用户管理。该方法利用大量的指令和子电路的递归调用来实现电路的有效描述，在模拟电路设计中很少用到时变元件。相反，在数字电路的情况下，可以容易地构造改变乘法器系数的自适应信号处理系统。为了便于模拟这些自适应电路，独立管理的乘法器系数的每个子电路是可用的，在所提出的描述方法。少

In order to analyze a circuit by using computers, it is necessary to describe the circuit in some way. In the case of digital circuits, this corresponds to numbering each node in the circuits and generating their coefficient matrixes. After the coefficient matrixes are obtained, the computable ordering of nodes can be decided for the time domain simulation. By such simulation, the impulse responses and the transfer function between arbitary nodes can be easily calculated.In order to obtain these coefficient matrixes, it may be suggested that they are made directly from the circuit. In this case, however, it is impossible to manage a large scale circuit by dividing it into some sub-circuits, and it is expected that there are careless mistakes of description. Considering these points, the enumerative description of each circuit element is generally used. This method is adopted in Spice which is a representative analyzing program of analog circuits. This description method is simple and p … More lain because it simply enumerates nodes' numbers to which elements are connected and the elements values. However, it costs the users much time to manage all of the nodes' numbers and the circuit parameters completely.In this paper, we propose a novel method to describe digital circuits as a kind of language instead of simply enumerating data of connections. By the proposed method, it is possible to describe a whole circuit as interconnections of a main circuit and some subcircuits, and to deal the main circuit as a main routine of ordinal procedural languages and each sub-circuit as a sub-routine. At that time, nodes in each sub-circuit can be named independently and numbered automatically by the system without users' management. In the proposed method, an effective description of circuits is expected by using a lot of instructions and recursive calls of sub-circuits.In the case of designing analog circuits, time varying elements are rarely used. On the contrary, in the case of digital circuits, the adaptive signal processing systems which vary the coefficients of multipliers can be easily constructed. For easy simulation of these adaptive circuits, independent management of the multiplier coefficients of each sub-circuit is available in the proposed description method. Less