Automated Design of Analog Circuits Using a Cell-Based Structure

Hajime SHIBATA  Soji MORI  Nobuo FUJII  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E86-A   No.2   pp.364-370
Publication Date: 2003/02/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
analog circuit synthesis,  design automation,  topological optimization,  genetic algorithm,  

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An automated synthesis for analog computational circuits in transistor-level configuration is presented. A cell-based structure is introduced to place moderate constraints on the MOSFET circuit topology. Even though each cell has a simple structure that consists of one current path with four transistors, common analog building blocks can be implemented using combinations of the cells. A genetic algorithm is applied to search circuit topologies and transistor sizes that satisfy given specifications. Synthesis capabilities are demonstrated through examples of three types of computational circuits; absolute value, squaring, and cubing functions by using computer simulations and real hardware.