Computer-Aided Circuit Design by Singular Imbedding

introduced to impose the desired coiistraints. Inequality as well as equality The most significant advances made in computer-aided circuit design have been in analysis programs. The designer can now choose from among several general purpose programs that program which most nearly suits his particular needs. In designing a circuit to meet a given set of requirements, the usual approach has been to use analysis programs in some optimization scheme. Through an iterative process, carried out by the machine, the man, or a man-machine interaction, a final design is reached. The approach presented here provides a direct solution, and does not rely on such iterative schemes. The method is most fertile in the area of active network design, where one often wishes to choose element values in a specified topology in order to meet some set of requirements. The method has been applied to a number of design problems of current interest including 275 276 T H E BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1969