期刊名称：International Journal of VLSI Design & Communication Systems
印刷版ISSN：0976-1527
电子版ISSN：0976-1357
出版年度：2017
卷号：8
期号：6
页码：1
DOI：10.5121/vlsic.2017.8601
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：The growing demand for energy constrained applications and portable devices have created a dire need forultra-low power circuits. Implantable biomedical devices such as pacemakers need ultra-low powercircuits for a better battery life for uninterrupted biomedical data processing. Circuits operating in subthresholdregion minimize the energy per operation, thus providing a better platform for energyconstrained implantable biomedical devices. This paper presents 8, 16 and 32-bit ultra-low power robustKogge-Stone adders with improved performance. These adders operate at subthreshold supply voltageswhich can be used for low power implantable bio-medical devices such as pacemakers. To improve theperformance of these adders in sub-threshold region, forward body bias technique and multi-thresholdtransistors are used. The adders are designed using NCSU 45nm bulk CMOS process library and thesimulations were performed using HSPICE circuit simulator. Quantitative power-performance analysis isperformed at slow-slow (SS), typical-typical (TT) and fast-fast (FF) corners clocked at 50 KHz fortemperature ranging from 25̊C to 120̊C. For a supply voltage 0.3V, all the adders had the least PDP. Using0.3V as the supply voltage, multi threshold voltage and forward body biasing techniques were applied tofurther improve the performance of the adders. The PDP obtained using the forward body biasingtechnique shows an effective improvement compared to high threshold voltage and multi threshold voltagetechniques. The forward biasing technique maintains a balance between delay reduction and increase inaverage power, thus reducing the power delay product when compared to the other two techniques.
关键词：Kogge-Stone adder; Bio-Medical; Sub-Threshold; Forward body bias; Multi Threshold.
