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Logic Synthesis Technique for High Speed Differential Dynamic Logic with Asymmetric Slope Transition Masao MORIMOTO Yoshinori TANAKA Makoto NAGATA Kazuo TAKI Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Vol.E88-A No.12 pp.3324-3331 Publication Date: 2005/12/01 Online ISSN: DOI: 10.1093/ietfec/e88-a.12.3324 Print ISSN: 0916-8508 Type of Manuscript: Special Section PAPER (Special Section on VLSI Design and CAD Algorithms) Category: Logic Synthesis Keyword: logic synthesis, ASDDL, asymmetric slope, differential logic, high speed, Full Text: PDF(726.6KB)>>
Summary: This paper proposes a logic synthesis technique for asymmetric slope differential dynamic logic (ASDDL) circuits. The technique utilizes a commercially available logic synthesis tool that has been well established for static CMOS logic design, where an intermediate library is devised for logic synthesis likely as static CMOS, and then a resulting synthesized circuit is translated automatically into ASDDL implementation at the gate-level logic schematic level as well as at the physical-layout level. A design example of an ASDDL 16-bit multiplier synthesized in a 0.18-µm CMOS technology shows an operation delay time of 1.82 nsec, which is a 32% improvement over a static CMOS design with a static logic standard-cell library that is finely tuned for energy-delay products. Design with the 16-bit multiplier led to a design time for an ASDDL based dynamic digital circuit 300 times shorter than that using a fully handcrafted design, and comparable with a static CMOS design. | ||||||||||
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