Simultaneous Sleep Transistor Insertion and Power Network Synthesis for Industrial Power Gating Designs

Abstract

Sleep transistors in industrial power-gating designs are custom designed with an optimal size. Consequently, sleep transistor P/G network optimization becomes a problem of finding the optimal number of sleep transistors and their placement as well as optimal P/G network grids, wire widths and layers. This paper presents a fake via based sleep transistor P/G network synthesis method, which addresses the requirements from industrial power-gating designs. The method produces optimal sleep transistor P/G networks by simultaneously optimizing sleep transistor insertion and placement as well as the power network grids and wires for minimum area, maximum routability with a given IR-drop target.