Augmenting slicing trees for analog placement

Abstract

The slicing-tree representation had been proven to be very effective and efficient in optimizing floorplanning/placement and handling design/layout migration in modern system-on-chips (SoCs). However, none of the previous works introduced any symmetric-feasible condition in the slicing trees for analog device-level placement. This paper augments the slicing trees by introducing a new insertion operation and presents the symmetric-feasible conditions. Based on the augmented slicing trees and the symmetric-feasible conditions, various symmetric placements can be effectively explored during analog placement optimization.