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- W811722306 abstract "In the next generation of VLSI circuits, concurrent optimizations will be essential to achieve the performance challenges. In this dissertation, we present techniques for combining traditional timing optimization techniques to achieve a superior performance.The method of buffer insertion is used in timing optimization to either increase the driving power of a path in a circuit, or to isolate large capacitive loads that lie on noncritical or less critical paths. The procedure of transistor sizing selects the sizes of transistors within a circuit to achieve a given timing specification. Traditional design techniques perform these two optimizations as independent steps during synthesis, even though they are intimately linked and performing them in alternating steps is liable to lead to suboptimal solutions. The first part of this thesis presents a new approach for unifying transistor sizing with buffer insertion. Our algorithm achieve from 5% to 49% area reduction compared with the results of a standard transistor sizing algorithm.The next part of the thesis deals with the problem of collapsing gates for technology mapping. Two new techniques are proposed. The first method, the odd-level transistor replacement (OTR) method, performs technology mapping without the restriction of a fixed library size, and maps a circuit to a virtual library of complex static CMOS gates. The second technique, the Static CMOS/PTL method, uses a mix of static CMOS and pass transistor logic (PTL) to realize the circuit, using the relation between PTL and binary decision diagrams. The methods are very efficient and can handle all ISCAS'85 benchmark circuits in minutes. On average, it was found that the OTR method gave 40%, and the Static/PTL gave 50% delay reductions over SIS, with substantial area savings.Finally, we extend the technology mapping work to interleave it with placement in a single optimization. Conventional methods that perform these steps separately will not be adequate for next-generation circuits. Our approach presents an integrated solution to this problem, and shows an average of 28.19%, and a maximum of 78.42% improvement in the delay over a method that performs the two optimizations in separate steps." @default.
- W811722306 created "2016-06-24" @default.
- W811722306 creator A5047722981 @default.
- W811722306 creator A5068714995 @default.
- W811722306 date "2018-08-13" @default.
- W811722306 modified "2023-10-16" @default.
- W811722306 title "Concurrent optimization strategies for high-performance VLSI circuits" @default.
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- W811722306 doi "https://doi.org/10.31274/rtd-180813-10782" @default.
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