A Placement Program for Printed Circuit Boards

概要

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A placement program for printed circuit boards is described. The purpose of the program is to determine the optimal placement of circuit components on a board automatically using DA (design automation) techniques. The outputs of this program are available for the routing program to obtain a printed connection path. The unique features of the program are a s follows.(1) The placement is performed by a step-by-step improvement, applying alternate repetition of gate-assignment and IC-placement so that the total length of the connection path is minimized.(2) Steinberg's method is extended for determining the location of gates.(3) Practical methods are developed for determining the location of IC's. In this paper the placement techniques developed in the program, the computer program, and the results of computation are described.
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