An Evolutionary Synthesis of Analog Active Circuits Using Current Path Based Coding

Hajime SHIBATA  Nobuo FUJII  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E84-A   No.10   pp.2561-2568
Publication Date: 2001/10/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: VLSI Design Technology and CAD
analog circuit synthesis,  design automation,  MOS transistor circuit,  genetic algorithm,  

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This paper presents an automatic synthesis method of active analog circuits that uses evolutionary search and employs some topological features of analog integrated circuits. Our system firstly generates a set of circuits at random, and then evolves their topologies and device sizing to fit an environment which is formed by the fitness function translated from the electrical specifications of the circuit. Therefore expert knowledge about circuit topologies and sizing are not needed. The capability of this method is demonstrated through experiments of automatic synthesis of CMOS operational amplifiers.