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2015 2nd International Conference on Electronics and Communication Systems (ICECS)最新文献

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A comparative study of high performance dynamic comparators using strained silicon technology 采用应变硅技术的高性能动态比较器的比较研究
A. Manikandan, J. Ajayan, C. Kavin, S. Karthick, D. Nirmal
Dynamic comparators are widely being used in high speed Analog to Digital Converters (ADC) such as flash ADC's because of its low voltage, low power, high speed and area efficiency. In this paper, an analysis on the delay and power performance of strained silicon CMOS technology based dynamic comparators will be presented. To compare the performance of dynamic comparators, test circuits were simulated using 45nm high performance and low power technologies with a supply voltage of 0.8V using spice tools. Using circuit simulations, the overall improved characteristics of double tail dynamic comparator are demonstrated in comparison to those of the traditional as well as several state of the art dynamic comparators. The simulation results shows that in the dynamic double tail comparator both the power consumption and the time delay are reduced significantly.
动态比较器以其低电压、低功耗、高速度和面积效率等优点被广泛应用于flash ADC等高速模数转换器中。本文将分析基于应变硅CMOS技术的动态比较器的延迟和功率性能。为了比较动态比较器的性能,采用45nm高性能低功耗技术,在0.8V电源电压下,使用spice工具对测试电路进行了仿真。通过电路仿真,证明了双尾动态比较器与传统动态比较器以及几种最新动态比较器的总体改进特性。仿真结果表明,在动态双尾比较器中,功耗和时延都得到了显著降低。
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引用次数: 5
High speed low power 64-bit comparator designed using current comparison based domino logic 高速低功耗64位比较器设计使用当前比较基于domino逻辑
A. Manikandan, J. Ajayan, C. K. Arasan, S. Karthick, K. Vivek
The rapid growth in CMOS technology with the shrinking device size towards 22 nm has allowed for placement of billions of transistors on a single microprocessor chip. To achieve very high system performance, domino logic styles are widely employed in high performance VLSI chips together with aggressive technology scaling. Comparators are widely used in central processing units (CPUs) and microcontrollers (MCUs). In this paper, a 64 bit comparator circuit is proposed which has a lower leakage and higher noise immunity without dramatic speed degradation compared to high speed domino logic, leakage current replica keeper domino logic and diode footed domino logic. This circuit is based on comparison of mirrored current of the pull up network (PUN) with its worst case leakage current. Current comparison based domino technique reduces the parasitic capacitance on the dynamic node using a small keeper transistor, which reduces the contention current, power consumption and also the delay of the circuit. Simulation results of 64 bit comparator designed using a 22nm high performance predictive technology model demonstrate 51% power reduction compared to a standard domino circuits for 64 bit comparator.
随着CMOS技术的快速发展,器件尺寸向22纳米缩小,使得在单个微处理器芯片上放置数十亿个晶体管成为可能。为了实现非常高的系统性能,多米诺逻辑风格被广泛应用于高性能VLSI芯片中,并结合积极的技术扩展。比较器广泛用于中央处理器(cpu)和微控制器(mcu)。本文提出了一种64位比较器电路,与高速骨牌逻辑、漏电流副本保持骨牌逻辑和二极管脚骨牌逻辑相比,该电路具有更低的漏电率和更高的抗噪声能力,并且没有显著的速度下降。该电路是基于上拉网络的镜像电流与最坏情况下的漏电流的比较。基于电流比较的多米诺骨牌技术利用一个小的保持晶体管减少了动态节点上的寄生电容,从而降低了争用电流、功耗和电路的延迟。采用22nm高性能预测技术模型设计的64位比较器的仿真结果表明,与标准的64位比较器多米诺电路相比,功耗降低51%。
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引用次数: 10
Closed loop control system modeling of Permanent Magnet Brushless DC Motor 永磁无刷直流电动机闭环控制系统建模
A. N. Subramonium, Prakhyath Shetty, M. Kumar
In this paper the more precise mathematical modeling of Permanent Magnet Brushless DC Motor (PMBLDC) has been presented. This is required for accurate real time applications of PMBDLC drive. The electronic and communication system of this motor drive is a power processing unit (PPU). The technological growth of the 21st century in microelectronics and control has resulted in powerful linear integrated circuits, microcontrollers and digital signal processors. In addition, the development in semiconductor technology also made it possible to significantly handle the voltage and current capabilities and the switching speeds of semiconductor devices which are the integral part of the Power Processing Unit (PPU). The Digital Signal Processors (DSPs) are used for real-time control. This requires efficient performance of the control for which steady state and transient model of the PMBLDC motor are necessary. The developed model is simulated using Matlab/ Simulink to confer the operating behavior of the drive prior to the implementation.
本文对永磁无刷直流电动机(PMBLDC)进行了较为精确的数学建模。这是精确实时应用PMBDLC驱动器所必需的。该电机驱动的电子和通信系统是一个电源处理单元(PPU)。21世纪微电子和控制技术的发展产生了强大的线性集成电路、微控制器和数字信号处理器。此外,半导体技术的发展也使得作为电源处理单元(PPU)组成部分的半导体器件的电压和电流能力以及开关速度的显著处理成为可能。数字信号处理器(dsp)用于实时控制。这就需要有效的控制性能,而PMBLDC电机的稳态和瞬态模型是必要的。利用Matlab/ Simulink对所开发的模型进行了仿真,以确定驱动器在实现之前的运行行为。
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引用次数: 2
Particle Swarm Optimization tuned BELBIC controller for 8/6 SRM operation 粒子群优化调整了8/6 SRM运行的BELBIC控制器
K. Malarvizhi, Madhusudan Kumar
SRM motors due to simple mechanical design have significant role in high speed operations and hence require faster control of rotor speed and minimized torque ripple. Proposed work uses Particle Swarm Optimization (PSO) for the tuning of the Emotional Learning controller (BELBIC). PSO is used for tuning the training coefficients of the BELBIC and maximizing the reward of the system to provide minimized speed settling time. The simulation is performed on an 8/6 SRM in MATLAB r2012a version. The operation of 8/6 SRM motor is compared by using a simple PID controller, a BELBIC Controller and a PSO tuned BELBIC controller. PSO tuned BELBIC controller shows higher operational efficiency compared to the other two methods.
SRM电机由于机械设计简单,在高速运行中具有重要作用,因此需要更快地控制转子转速和最小化转矩脉动。提出的工作使用粒子群优化(PSO)来调整情绪学习控制器(BELBIC)。粒子群算法用于调整BELBIC的训练系数,使系统的奖励最大化,以提供最小的速度稳定时间。仿真在MATLAB r2012a版本的8/6 SRM上进行。通过使用简单的PID控制器、BELBIC控制器和PSO调谐BELBIC控制器对8/6 SRM电机的运行进行了比较。与其他两种方法相比,粒子群调谐的BELBIC控制器显示出更高的运行效率。
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引用次数: 1
Low power SVM module using spurious power suppression technique 低功耗支持向量机模块采用伪功率抑制技术
R. Ravanya, S. Ramya
A biometric system makes a pattern recognition decision in accordance with the biometric features extracted from a human being. This paper presents a text-independent speaker Verification system using support vector machines (SVMs) is to identify the speaker by listening to the voice of the speaker. Thus speaker verification is to determine whether a test utterance is spoken by a target speaker and also causes large power dissipation. In this paper, Spurious Power Suppression Technique (SPST) is utilized to overcome these issues, which uses a detection logic circuit to detect the effective data range of arithmetic units, e.g., adders or multipliers. This SPST is used to reduce the power dissipation when compared to previous method.
生物识别系统根据从人体提取的生物特征做出模式识别决策。本文提出了一种基于支持向量机(svm)的文本无关的说话人验证系统,该系统通过听说话人的声音来识别说话人。因此,说话人验证是为了确定测试话语是否由目标说话人说,也造成了很大的功耗。本文利用伪功率抑制技术(SPST)来克服这些问题,该技术使用检测逻辑电路来检测算术单元(如加法器或乘法器)的有效数据范围。与以前的方法相比,该SPST用于降低功耗。
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引用次数: 0
Optimization of power quality problem for a windturbine fixed speed induction generatorunder asymmetric faultsusing UPFC fed vector control-PI, hysteresis and fuzzy logic 应用UPFC矢量控制- pi、滞后和模糊逻辑优化非对称故障下风力发电机的电能质量问题
P. Karthigeyan, M. S. Raja, M. Sheeba, R. Gnanaselvam, N. Raj
Most of the pollution issues created in power system is due to the power quality problems like faults, harmonics etc. In this paper a grid connected fixed speed wind turbine induction generator subjected to asymmetric fault gets attenuated by unified power flow controller (UPFC) as it compensates the positive and negative sequence voltages thereby reducing the torque oscillations and improving the life time of the drain. It is the combination of static compensator (STATCOM) and static synchronous series compensator (SSSC). The control theory is based on vector control- dq(direct quadrature axis) reference frame fed PI, hysteresis control and fuzzy logic control using DSOGI-PLL(Dual second order generalized integrator- Phase locked loop). The proposed system is implemented using MATLAB / SIMULINK platform with and without Unified power flow controller. The effect of UPFC for fixed speed windturbine under faults is analysed using the above three controllers and its performance is evaluated.
电力系统中产生的大部分污染问题是由于电力质量问题,如故障、谐波等。本文采用统一潮流控制器(UPFC)对不对称故障的并网定速风力发电机组进行正序电压和负序电压的补偿,从而减小了转矩振荡,提高了排极寿命。它是静态补偿器(STATCOM)和静态同步串联补偿器(SSSC)的结合。控制理论是基于矢量控制- dq(直接交轴)参考系馈入PI,滞回控制和模糊逻辑控制采用DSOGI-PLL(双二阶广义积分器-锁相环)。该系统在MATLAB / SIMULINK平台上实现,有统一潮流控制器和没有统一潮流控制器。利用以上三种控制器分析了UPFC在故障情况下对定速风力机的控制效果,并对其性能进行了评价。
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引用次数: 0
Dual tree DWT analysis based electrocardiogram signal compression using zero coding technique 基于双树DWT分析的心电图信号零编码压缩技术
Ranjeet Kumar, Anil Kumar
An Electrocardiogram (ECG) signal compression becomes more area of interest due to increases demand of tel-e-healthcare system. In this manuscript, dual tree discrete wavelet decomposition (DT-DWT) based ECG signal compression is exploited using zero run-length coding techniques. The main advancement of proposed technique, its sensitivity of generating sparse data set that helps to enhance compression performance of system. Performance of method evaluated through compression ratio and percentage root-mean square difference and quality evaluated using the cross correlation between the original and reconstructed MIT-BIH records. As discuses in results, proposed method is good as compare to earlier developed techniques in term of compression.
由于远程电子医疗系统需求的增加,心电图信号压缩成为越来越受关注的领域。在本文中,对偶树离散小波分解(DT-DWT)为基础的心电信号压缩利用零运行长度编码技术。该技术的主要进步在于其生成稀疏数据集的敏感性,有助于提高系统的压缩性能。通过压缩比和均方根差的百分比来评估方法的性能,通过原始和重建MIT-BIH记录之间的相互关系来评估方法的质量。结果表明,该方法在压缩方面优于早期开发的技术。
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引用次数: 7
GSAWM for beamforming and directivity of linear antenna arrays 线性天线阵列波束形成和指向性的GSAWM
G. Ram, P. Chakravorty, D. Mandal, R. Kar, S. Ghoshal
In this paper, a new evolutionary optimization algorithm named gravitational search algorithm with wavelet mutation (GSAWM) is adopted for optimal design of hyper beam pattern of linear antenna arrays. Hyper beam is derived from sum and difference beam patterns associated with hyper beam exponent parameter for the array. In GSAWM, particles are considered as objects and their performances are measured by their masses. All these objects attract each other by gravity forces, and these forces produce global movements of all objects towards the objects with heavier masses. GSAWM guarantees the exploitation step of the algorithm and it is apparently free from premature convergence. Extensive simulation results justify superior optimization capability of GSAWM over the aforementioned optimization techniques. By optimization of current excitation weights and uniform inter-element spacing, GSAWM achieves optimized hyper beam with much greater reduction in side lobe level (SLL), improved directivity and much more improved first null beam width (FNBW), keeping the same value of hyper beam exponent. The whole simulation experiment has been performed for 10-, 14-, and 20-element linear antenna arrays.
本文提出了一种新的进化优化算法——小波突变引力搜索算法(GSAWM),用于线性天线阵超波束方向图的优化设计。超波束是由与阵列的超波束指数参数相关的和波束和差波束方向图导出的。在GSAWM中,粒子被视为物体,它们的性能由它们的质量来衡量。所有这些物体都因重力而相互吸引,这些引力使所有物体都朝着质量更大的物体运动。GSAWM保证了算法的开发步骤,并且明显避免了过早收敛的问题。大量的仿真结果证明了GSAWM的优化能力优于上述优化技术。通过优化电流激励权值和均匀元间间距,GSAWM实现了优化后的超光束,旁瓣电平(SLL)大幅降低,指向性得到改善,第一零束宽度(FNBW)大幅提高,超光束指数保持不变。对10元、14元和20元线性天线阵列进行了完整的仿真实验。
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引用次数: 4
Efficient flip-flop merging technique for clock power reduction 时钟功耗降低的高效触发器合并技术
A. Abinaya, S. Sivaranjani
Power reduction plays a vital role in VLSI design. Multi-bit flip-flop is an efficient method for clock power reduction. This method is to eliminate the redundant inverters by merging some flip-flops into multi-bit flip-flops. This multi-bit flip-flops can share the drive strength, dynamic power, area of the inverter chain and can even save the clock network power and facilitate the skew control. Firstly flip-flops that can be merged are identified based on synchronous clock signal and then a combination table is built to define the possible combination of flip-flops and finally a hierarchical way is used to merge flip-flops.
降低功耗在超大规模集成电路设计中起着至关重要的作用。多比特触发器是降低时钟功耗的有效方法。该方法通过将多个触发器合并成多比特触发器来消除冗余逆变器。这种多比特触发器可以共享变频器链的驱动强度、动态功率、面积,甚至可以节省时钟网络功率,便于歪斜控制。首先基于同步时钟信号识别可合并的触发器,然后建立组合表来定义可能的触发器组合,最后采用分层方式进行触发器合并。
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引用次数: 0
Design of planar multi-ring monopole antenna for UWB applications 面向超宽带应用的平面多环单极天线设计
M. Geethananda, Z. C. Alex, K. Shambavi
A planar multi-ring monopole antenna for ultra wide band applications is presented in this paper. The proposed antenna is designed using concentric rings of width 1.3 mm which leads to improved band width, radiation efficiency and reduced size. The proposed antenna size is 30*30*1.6 mm3 which operates over a frequency range of 2.6 to 13.5 GHz. The radiation pattern is consistent in UWB range which is bidirectional in elevation plane and omnidirectional in azimuth plane. The radiation efficiency of the proposed antenna is 94.6%.
提出了一种用于超宽带应用的平面多环单极天线。该天线采用宽度为1.3 mm的同心圆设计,提高了天线的带宽,提高了天线的辐射效率,减小了天线的尺寸。建议的天线尺寸为30*30*1.6 mm3,工作频率范围为2.6至13.5 GHz。辐射方向图在超宽带范围内是一致的,在仰角面是双向的,在方位面是全向的。天线的辐射效率为94.6%。
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引用次数: 2
期刊
2015 2nd International Conference on Electronics and Communication Systems (ICECS)
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