A practical algorithm for DC operating‐point analysis of large‐scale circuits
A practical algorithm for DC operating‐point analysis of large‐scale circuits
复制标题
大规模电路直流工作点分析的实用算法
DOI：
10.1002/ecjc.4430771005
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Y. Inoue
中科院分区：
文献类型：
--
作者：
Y. Inoue
SPICE型通用电路仿真器作为电路设计的辅助工具得到了广泛的应用。然而，经常发生的是，d 0操作点分析不收敛。为了科普这种情况，已经提出了各种方法的基础上的连续方法的全局收敛性，但这些还没有到大规模电路的实际应用阶段。
本文提出了一种可在通用电路模拟器上实现的确定大规模电路去工作点的实用算法。作为第一步，引入了“修正割集分析”的概念，并给出了修正节点方程的一些性质。然后，它是示出，在实际电路中，该算法的收敛性是理论上保证。该算法，然后实现现有的通用电路模拟器，并施加到一个双极型模拟LSI，以证明其有效性。对于用18，553个修正节点方程表示的LSI电路，使用IBM RS6000-550在270分钟内确定去工作点。
SPICE-type general-purpose circuit simulators are used widely as a support tool for circuit design. It often happens, however, that the do operating-point analysis does not converge. To cope with such a situation, various approaches have been proposed based on continuation methods with the global convergence property, but these have yet to come to the stage of practical application to large-scale circuits.
This paper proposes a practical algorithm which can be implemented on the general-purpose circuit simulators with modified nodal formulation, for determining the de operating-point of large-scale circuits. As the first step, the concept of “modified cut-set analysis” is introduced and some properties of the modified nodal equation are presented. Then it is shown, in practical circuits, that the convergence of the algorithm is theoretically guaranteed. The proposed algorithm is then implemented on an existing general-purpose circuit simulator and applied to a bipolar analog LSI to demonstrate its effectiveness. For the LSI circuit formulated in 18, 553 modified nodal equations, the de operating point was determined in 270 minutes using an IBM RS6000-550.