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Voltage island has become a very effective design style for power saving in low-power design. However, the new design style also brings forward new challenges, especially to the designers of power/ground (P/G) networks. In this paper, we study the power delivery problem in voltage island designs, and propose to consider voltage drop during the floorplanning process to reduce design iterations. Our...
In this paper, we propose a fast routability-driven routing algorithm for hierarchical FPGAs (HFPGAs), using several strategies to steer the automated process of rip up and reroute in order to speed up the process and reach the same effectiveness of Pathfinder's negotiation mechanism. Net is expelled from congestion zone to resourceful zone. The algorithm is divided into two procedures. First, it...
The technique of cell shifting has the advantage of linearly smoothing the overlap in placement. In the shifting process we should preserve the integrity of the original placement as much as possible and do less damage to the relative locations of the cells. The current cell shifting methods only locally or globally smooth the density without considering the relation between the local and the global...
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