TAILIEUCHUNG - Handbook of algorithms for physical design automation part 84

Handbook of Algorithms for Physical Design Automation part 84 provides a detailed overview of VLSI physical design automation, emphasizing state-of-the-art techniques, trends and improvements that have emerged during the previous decade. After a brief introduction to the modern physical design problem, basic algorithmic techniques, and partitioning, the book discusses significant advances in floorplanning representations and describes recent formulations of the floorplanning problem. The text also addresses issues of placement, net layout and optimization, routing multiple signal nets, manufacturability, physical synthesis, special nets, and designing for specialized technologies. It includes a personal perspective from Ralph Otten as he looks back on. | 39 Placement-Driven Synthesis Design Closure Tool Charles J. Alpert Nathaniel Hieter Arjen Mets Ruchir Puri Lakshmi Reddy Haoxing Ren and Louise Trevillyan CONTENTS Major Phases of Physical Optimization and Placement Bin-Based Placement Exact Placement .818 Critical Path Gate Gate Sizing with Multiple-vt Libraries .819 Incremental Synthesis .820 Advanced Synthesis Fixing Early Paths .823 Drivers for Multiple Mechanisms for Area Routing Recovery. 826 vt Recovery. 827 Other Considerations. 827 Hierarchical High-Performance Power Gating to Reduce Leakage Into the INTRODUCTION Much of this book has focused on the components of physical synthesis such as global placement detailed placement buffering routing Steiner tree and congestion estimation. Physical synthesis combines these steps as well as several others to primarily perform timing closure. When wire delays were relatively insignificant compared to gate delays logic synthesis provided a sufficiently accurate picture of the timing of the design. Placement and routing did not need to focus on timing but were exclusively wirelength driven. Of course technology trends have transformed physical design because the physical implementation affects timing. 813 814 Handbook of Algorithms for Physical Design Automation Today a design that satisfies timing requirements in synthesis almost certainly will not do so once implemented physically due to wire delays. Physical synthesis is a process that modifies the design so that the impact on timing due to wiring is mitigated. It may move cells resize logic buffer nets and perform local resynthesis. Besides basic timing closure there are many .

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