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首页> 外文期刊>IEEE Journal of Solid-State Circuits >High-speed and low-power CMOS priority encoders
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High-speed and low-power CMOS priority encoders

机译:高速和低功耗CMOS优先编码器

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摘要

The design of two high-performance priority encoders is presented.nThe key techniques for high speed are twofold. First, a multilevelnlook-ahead structure is developed to shorten the critical pathneffectively. Second, this look-ahead structure is realized efficientlynby the NP Domino CMOS logic, and all the dynamic gates have anparallel-connected circuit structure. For high speed and low power atnthe same time, the series-connected circuit structure is adopted in thenless critical paths to reduce the switching activity, but such a designnneeds to cascade two n-type dynamic gates directly resulting in the racenproblem. A special circuit technique is utilized to rescue this problem.nSeveral 32-bit priority encoders are designed to evaluate thenfeasibility of the proposed techniques. The best new design realizes anthree-level look-ahead structure, and it achieves 65% speed improvement,n20% layout area reduction, and 30% power reduction simultaneously asncompared to the conventional design with a simple look-ahead structure
机译:提出了两种高性能优先级编码器的设计。n高速的关键技术是双重的。首先,开发了一种多级超前结构来有效缩短关键路径。其次,通过NP Domino CMOS逻辑有效地实现了这种超​​前结构,并且所有动态门都具有并联电路结构。为了同时实现高速和低功率,在无数次关键路径中采用了串联电路结构以减少开关活动,但是这种设计需要将两个n型动态门直接级联,从而导致竞争问题。利用一种特殊的电路技术来解决该问题。设计了几种32位优先级编码器来评估所提出技术的可行性。最佳的新设计实现了三级超前结构,与简单的超前结构相比,传统设计实现了65%的速度提升,n20%的布局面积缩减以及30%的功耗降低

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