A Novel Performance-Driven Automatic Layout Tool for Analog Circuit

摘要

The quality of analog layout is a crucial factor to the final performance of analog circuits. In this paper we present a novel performance-driven automatic layout tool for analog circuits. Considering there is always a signal flow in each analog circuit and the circuits carrying signals are the most important parts in the whole circuits, we put forward a new performance-driven automatic layout approach based on the signal flow analysis. Our tool can control the performance degradation induced by layout at all the stages of layout generation from device generation to placement and routing. So the methodology guarantees that the resulting layout will meet all the constraints of parasitic parameters and device matches induced from performance specifications of analog circuits by sensitivity analysis. Excellent circuit performance obtained by the methodology is demonstrated by practical circuit-examples.