【摘要】 提出了一种新的 MOS模拟单元电路的 STACK版图自动生成方法 .该方法将电路网表映射为扩散图 ,基于扩散图进行电路划分、模板匹配和对称查找 .提出的对称查找算法适用于非全对称电路的最大匹配对称结构查找 .文中改进了 Atallah欧拉路径生成算法 ,通过增加哑元条保证欧拉路径的生成 .对生成的 STACK,采用分布式寄生电容模型计算各个节点的寄生电容 ,并计算 STACK的面积和形状 ,以确保其能够满足设计要求更多还原

【Abstract】 This paper proposes a new technique to automatically generate STACK layout for MOS analog cell circuits. The circuit net list is first mapped into a diffusion graph. Based on the diffusion graph, circuit partition, pattern recognition and symmetry searching are carried out to generate sub graphs, each of which can be implemented by a STACK. The proposed symmetry searching algorithm can find the maximal symmetry structures in a none fully symmetric circuit. To guarantee the generation of a Eularian trail, the Atallah Eularian trail generation algorithm is improved by employing the dummy adding technique. In order to evaluate the performance of a generated STACK, a distributed parasitic capacitance model is applied to calculate the STACK node parasitic capacitance, as well as the calculation of STACK area and shape.更多还原