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arXiv 1207.2840cs.AR
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高速运算电路中混合加法器的设计与性能分析

Design and Performance Analysis of hybrid adders for high speed arithmetic circuit

Rajkumar Sarma, Veerati Raju

摘要:

本文介绍了采用栅扩散技术(GDI)和PTL-GDI技术的加法器单元。GDI技术允许降低功耗、传播延迟和低PDP(功率延迟乘积),而传输晶体管逻辑(PTL)通过消除冗余晶体管来减少用于制造不同逻辑门的晶体管的数量。并对各种混合加法器进行了性能比较。在本文中,我们提出了两个新的设计的基础上GDI和PTL技术,这是被发现是更高的功率效率相比,现有的设计技术。两种设计都只使用了10个晶体管来实现SUM & CARRY功能。SUM和CARRY单元以级联方式实现,即首先实现XOR单元,然后使用XOR作为输入SUM以及CARRY单元来实现。对于建议的GDI加法器的SUM以及CARRY单元设计使用GDI技术。在PTL-GDI加法器中,SUM单元采用PTL技术构造,CARRY单元采用GDI技术设计。两种设计的优点进行了讨论。在Cadence Virtuoso 180 nm环境下的仿真结果证实了这些设计的重要性。

英文摘要:

Adder cells using Gate Diffusion Technique (GDI) & PTL-GDI technique are described in this paper. GDI technique allows reducing power consumption, propagation delay and low PDP (power delay product) whereas Pass Transistor Logic (PTL) reduces the count of transistors used to make different logic gates, by eliminating redundant transistors. Performance comparison with various Hybrid Adder is been presented. In this paper, we propose two new designs based on GDI & PTL techniques, which is found to be much more power efficient in comparison with existing design technique. Only 10 transistors are used to implement the SUM & CARRY function for both the designs. The SUM and CARRY cell are implemented in a cascaded way i.e. firstly the XOR cell is implemented and then using XOR as input SUM as well as CARRY cell is implemented. For Proposed GDI adder the SUM as well as CARRY cell is designed using GDI technique. On the other hand in Proposed PTL-GDI adder the SUM cell is constructed using PTL technique and the CARRY cell is designed using GDI technique. The advantages of both the designs are discussed. The significance of these designs is substantiated by the simulation results obtained from Cadence Virtuoso 180nm environment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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