论文部分内容阅读
一、引言 Schematic Capture(SC)作为一个交互式的软件,衡量其质量的重要标志就是效率,即要求对各种命令能作出十分迅速的响应。 在原理图编辑过程中,对大量图块的操作,首先要求对图块查询的高速度。其次,由于单元图块的具体形状由单元库决定,因而还要求对指定单元在库中查询的高速度。编辑完成后,根据图形数据及元什在库中的信息,能正确、快速地生成电路拓扑信息。 上述要求的关键,是要对整套图形信息的存贮,有一个合理的数据结构。
I. INTRODUCTION As an interactive software, an important indicator of the quality of Schematic Capture (SC) is its efficiency, which requires very fast response to various commands. In the schematic editing process, the operation of a large number of blocks, first of all require the query block high speed. Second, since the specific shape of a cell tile is determined by the cell library, it also requires a high speed lookup of the specified cell in the library. After editing, according to the graphics data and meta-information in the library, the circuit topology information can be generated correctly and quickly. The key to the above requirements is to have a reasonable data structure for storing the entire set of graphics information.