FUZZY LOGIC FOR STANDARD CELL PLACEMENT

Improved manufacturing processes and techniques have increased the level of integration and complexity of the ubiquitous silicon chip. But as design complexity grows, physical design automation becomes indispensable. At present a variety of tools are available to assist the designer in the various phases of circuit design. Tools for automatic placement of VLSI cells, in particular, have received much attention, because good placement is a key factor in achieving the demanded performance levels. In this paper, we present a new technique based on fuzzy logic for the placement of double-entry standard cells. Fuzzy logic offers a better alternative for handling uncertainty, and it models the human operator rather than the operation. Simulation results for the placement of nine test circuits are presented and compared with those of two other techniques.