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2018 4th International Conference on Devices, Circuits and Systems (ICDCS)最新文献

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A CNTFET Based Quaternary Ful1 Adder 基于cnfet的四元全加法器
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605139
Krishna Chaitanya Sankisa, R. Sahoo, S. K. Sahoo
The Adder is one of the most important and basic units of arithmetic logics which is used to design many complex circuits. Till now, all arithmetic circuits are mostly use CMOS circuits for binary logic implementation. Recently Carbon nanotube field effect transistor (CNTFET) has attracted many researchers as its threshold voltage can be varied by changing the diameter of carbon nanotube which makes it useful for designing multivalued logic circuits. Exploring this property of CNTFET, few researchers have designed ternary adders. In this work, first time a Quaternary full adder using CNTFET based of circuit is proposed. The proposed circuit is designed based on the conventional CMOS architecture with utilization of inherent binary nature (0,1) of input carry signal. Since voltage at the output of the dynamic logic circuit is stored on a parasitic capacitance, a quaternary keeper circuit is used to alleviate charge sharing problems. The proposed design of Quaternary full adder circuit is simulated using HSPICE simulator with 14 nm Stanford CNTFET model. This adder consumes 103.18 nw power and has delay of 17.46 psec. This is a first effort to design a quaternary logic adder circuit.
加法器是算术逻辑中最重要、最基本的单元之一,用于设计许多复杂的电路。到目前为止,所有的算术电路大多采用CMOS电路来实现二进制逻辑。近年来,碳纳米管场效应晶体管(CNTFET)因其可以通过改变碳纳米管的直径来改变阈值电压而引起了人们的广泛关注,这对于设计多值逻辑电路非常有用。探索CNTFET的这一特性,很少有研究者设计三元加法器。本文首次提出了一种基于电路的四元全加法器。该电路是在传统CMOS结构的基础上,利用输入进位信号固有的二进制特性(0,1)设计的。由于动态逻辑电路的输出电压存储在寄生电容上,因此采用四元保持电路来缓解电荷共享问题。采用14nm Stanford CNTFET模型,利用HSPICE模拟器对所设计的四元全加法器电路进行了仿真。该加法器功耗为103.18 nw,延迟为17.46 psec。这是第一次尝试设计一个四元逻辑加法器电路。
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引用次数: 2
Choice of Gate Insulator for Effective Gate Electrostatics in Double Gate Nanoscale Mosfet 双栅极纳米Mosfet有效栅极静电的栅极绝缘子选择
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605073
G. Thriveni, K. Ghosh
A numerical model using self consistent Poisson's equation solver is presented to elucidate the potential profile and current-voltage characteristics of double gate nanoMOSFET using 32nm technology. Here we have explored the performance of the nanodevice with different dielectric layers. The focus of this work is to identify the type of gate dielectric material which is capable enough to control the electrostatics across the channel through gate bias and reduce the tunneling current. We find that $mathrm {T}mathrm {i}mathrm {O}_{2}$ layer having k=80 produces higher tunneling current through gate leakage although it exhibited stronger gate control on the channel conduction. A combination of $mathrm {T}mathrm {i}mathrm {O}_{2}$ and $mathrm {S}mathrm {i}mathrm {O}_{2}$ dielectric layers is proposed to mitigate tunnelling in these devices and improve its performance.
利用自相容泊松方程求解器建立了一个数值模型,分析了采用32nm工艺的双栅纳米mososfet的电位分布和电流电压特性。本文探讨了不同介电层的纳米器件的性能。本工作的重点是确定能够通过栅极偏置控制沟道上的静电并减少隧道电流的栅极介电材料类型。我们发现,k=80的$ mathm {T} mathm {i} mathm {O}_{2}$层虽然对沟道导通具有较强的栅极控制,但通过栅漏产生较高的隧穿电流。提出了$mathrm {T}mathrm {i}mathrm {O}_{2}$和$mathrm {S}mathrm {i}mathrm {O}_{2}$电介质层的组合,以减轻这些器件中的隧穿现象,提高其性能。
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引用次数: 0
Comparative investigation of Si/Sio.6Geo.4/InAs 3D-fin-TFET for its optimized performance Si/ si6 geo的对比研究。4/InAs 3D-fin-TFET的优化性能
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605125
Narasimhulu Thoti, R. Haritha, A. K. Kumar, A. Yadav, V. Narasimha Rao
one of the futuristic devices in replacing the conventional MOS device structure is TFET. In the proposed work, a 3D-fin-TFET geometrical structure with various lower-band gap materials has been investigated and achieved the sophisticated results. The higher drive current (IDS) achievement with the use of InAs based source junction has been reported. In addition to this various DC and RF metrics have been investigated and shown with better results. These characteristics have been extracted by considering the source material variations with that of Si/Sio0.6Geo0.4/InAs and the rcst is of Si. Thc clectrical analysis is cxtracted by using HfO2 as the dielectric, hence the maximum drive current (ID) of 7.1 mA is reported with InAs as the source. A least subthreshold swing of 11.90mV/decade is reported. For an InAs as source improved characteristics have been observed in the various DC characteristics are of Subthreshols swing, transconductance, output impedance and intrinsic gain. Also, RF metrics such as unity gain cutoff frequency (ft), maximum oscillation frequencies (fmax) with higher ft of 338.03 GHz and fmax of 776.26 GHz are reported.
未来取代传统MOS器件结构的器件之一是TFET。本文研究了具有多种低带隙材料的三维翅片- tfet几何结构,并取得了较好的结果。使用基于InAs的源结可以获得更高的驱动电流(IDS)。除此之外,还研究了各种直流和射频指标,并显示出更好的结果。这些特征是考虑了Si/ sio0.6、geo0.4 /InAs的源物质变化,其余为Si。电学分析采用HfO2作为介质提取,因此以InAs为源,报告了最大驱动电流(ID)为7.1 mA。最小亚阈值摆幅为11.90mV/ 10年。对于作为源的InAs,在亚阈值、摆幅、跨导、输出阻抗和固有增益等各种直流特性中都观察到改进的特性。此外,还报道了单位增益截止频率(ft)、最大振荡频率(fmax)等射频指标,其中ft较高,为338.03 GHz, fmax为776.26 GHz。
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引用次数: 0
Application Of Selective Region Growing Algorithm In Lung Nodule Segmentation 选择性区域生长算法在肺结节分割中的应用
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605155
P. Bruntha, Jaisil Rose. D, Shruthi A. T, Glory Juliet. K, Kanimozhi M
An effective methodology is proposed for early detection of lung cancer using computed tomography. A detailed literature survey and real time happenings led to capture the abnormal nodules. Initially, gaussian filter was used in pre-processing to remove noise. For segmenting lung parenchyma, an adaptive intensity thresholding method was used. To detect nodules, morphological operation as well as selective region growing algorithm was used. The abnormal nodules were detected by filtering the segmented image based on area.
提出了一种利用计算机断层扫描进行肺癌早期检测的有效方法。详细的文献调查和实时事件导致捕获异常结节。首先采用高斯滤波进行预处理,去除噪声。采用自适应强度阈值法对肺实质进行分割。采用形态学运算和选择性区域生长算法对结节进行检测。通过对分割后的图像进行面积滤波,检测出异常结节。
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引用次数: 4
Compressed sensing aided estimation of channel in downlink TDD large scale MIMO system 下行TDD大规模MIMO系统中信道的压缩感知辅助估计
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605169
V. Adinarayana, K. Krishna, P. R. Kumar
In 5G cellular networks Massive MIMO system offers many advantages including high performance due to simple transmit and receive operations. Essential feature for such system is the proper evaluation of channel state information at the transmitter (CSIT) which is not easy due to larger dimensional channels. Using standard techniques LS and proposed CS schemes simultaneously results in reduction of pilot overhead. This paper explains an estimation of channel in TDD domain with both least squares, CS techniques lessens the pilot overhead through NMSE against training sequence, Normalized beam forming gain against Tp at a specific SNR value, NMSE for different Fading block index with Tp as 60 under scattering evolution with ULA, UPA environment.
在5G蜂窝网络中,大规模MIMO系统由于收发操作简单,具有高性能等诸多优点。该系统的基本特征是在发射机处对信道状态信息进行适当的评估,这是由于信道尺寸较大而不容易实现的。同时使用标准技术LS和提出的CS方案可以减少飞行员开销。本文介绍了一种基于最小二乘和CS技术的TDD域信道估计方法,通过对训练序列的NMSE、特定信噪比下对Tp的归一化波束形成增益、不同衰落块指数(Tp为60)在ULA、UPA环境下散射演化的NMSE来减少导频开销。
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引用次数: 1
Design of 12 Bit 100MS/s Low Power Delta Sigma ADC Using Telescopic Amplifier 基于伸缩放大器的12位100MS/s低功率Delta Sigma ADC设计
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605152
D. Shylu, J. Helan, Jackuline Moni
This paper presents a design of 12-bit low power Delta Sigma ADC using telescopic op-amp architecture for space application. The self-biased technique used in the designed telescopic op-amp which eliminates the need for an external bias circuit. The combination of common source stage and common gate with the operational amplifier consumes less power and operated at high speed. This is achieved by changing the bias values of the currents in the input and the output stages. The circuit consists of less number of transistors in order to reduce the complexity and is designed with Refracting Telescopic amplifier. The simulation of the design is carried in 90nm standard CMOS technology and consumes 51.1pw power with 0.6 V(p-p)diff input signal and achieves the open loop gain of 41dB.
本文提出了一种基于空间伸缩运放架构的12位低功耗Delta Sigma ADC的设计方案。所设计的伸缩运算放大器采用自偏置技术,消除了外部偏置电路的需要。共源级和共门与运算放大器相结合,功耗低,运行速度快。这是通过改变输入和输出级电流的偏置值来实现的。该电路减少了晶体管数量,降低了电路的复杂性,并设计了折射伸缩放大器。该设计采用90nm标准CMOS工艺进行仿真,在0.6 V(p-p)差分输入信号下,功耗为51.1pw,开环增益为41dB。
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引用次数: 4
Transmitter Output Power Control of PCMC Radar for Short Range Tracking Bypassing Cross-field Amplifier 近程跟踪绕过交叉场放大器的PCMC雷达发射机输出功率控制
Pub Date : 2018-03-01 DOI: 10.1109/icdcsyst.2018.8605136
A. K. Ray, Alok Kumar Lenka
This paper presents a novel method to control the transmitter output power of PCMC (precision coherent monopulse C-band) radar by isolating the CFA (cross field amplifier) stage of MOPA (master oscillator power amplifier) chain. The isolation is achieved by switching mechanism in case of short-range tracking and it provides signal amplification in long-range tracking. The proposed scheme also reduces CFA operation time and TWT (traveling wave tube) output load.
本文提出了一种通过隔离主振功率放大器链的交叉场放大器(CFA)级来控制精密相干单脉冲c波段雷达发射输出功率的新方法。在近程跟踪时,通过开关机制实现隔离;在远距离跟踪时,通过开关机制实现信号放大。该方案还减少了CFA运行时间和行波管输出负载。
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引用次数: 0
Design of Cascadable S-band Amplifier using Tunable Equalizer 基于可调谐均衡器的s波段级联放大器设计
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605163
Ayisha B S, C. Saha, S. Joy, Apren T. J
This paper explains the design and simulation of a 2-stage $S$-band cascadable amplifier using $pHEMT-ATF 54143$ with wide band characteristics. $A$ modified tunable equalizer is proposed using which the amplifier is operated in S-band. Tunability of the equalizer is verified by designing the amplifier in 2–3 GHz, 3- $4GHz$ and in the entire $S$-band (2–4GHz). The gain obtained from all the three designs are flat when compared with previously reported results using equalizer. $A$ theoretical formulation to calculate the $S_{21}$ of the device is proposed and validated.
本文介绍了一种采用pHEMT-ATF 54143的两级S波段级联放大器的设计与仿真。提出了一种改进的可调谐均衡器,使放大器工作在s波段。通过在2-3 GHz、3- 4GHz和整个S - 2-4GHz频段设计放大器,验证了均衡器的可调性。与先前报道的使用均衡器的结果相比,所有三种设计获得的增益都是平坦的。提出并验证了计算该装置的$S_{21}$的$理论公式。
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引用次数: 1
BER Analysis of spatial multiplexing and STBC MIMO-OFDM System 空间复用和STBC MIMO-OFDM系统的误码率分析
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605151
T. Ravibabu, C. D. Raj
Higher data rates and reliability have been problems in the wireless communication systems from the outset. It is essential and necessary even by deal with multiple antennas at both ends; simultaneously fading occurs to each link can be considered due to multipath propagation this leads to increase BER performance at the receiver. We can achieve reliability and high data rates through MIMO-OFDM with STBC and spatial multiplexing techniques are used respectively. This paper explores to analyze different fading channels (Rayleigh and Nakagami) under AWGN environment on spatial multiplexing (SM) based MIMO systems, Zero forcing with Successive interference Cancellation (ZF-SIC), MMSE-SIC and ML equalization techniques are used to channel equalization. And of transmit diversity, STBC based MIMO-OFDM systems, Maximum Ratio Combining (MRC) technique is used. Simulation results showed with various modulation techniques (BPSK/QPSK/64QAM/32PSK) both Systems. Furthermore, BER performance of coded MIMO-Wi-Max systems also describes to transmit diversity.
更高的数据速率和可靠性从一开始就是无线通信系统的问题。即使处理两端的多个天线,它也是必不可少的;由于多径传播,每个链路同时发生衰落,从而提高了接收端的误码率性能。MIMO-OFDM分别采用STBC和空间复用技术实现高可靠性和高数据速率。本文探讨了基于空间复用(SM)的MIMO系统在AWGN环境下的不同衰落信道(Rayleigh和Nakagami),采用连续干扰抵消零强迫(ZF-SIC)、MMSE-SIC和ML均衡技术进行信道均衡。在传输分集方面,基于STBC的MIMO-OFDM系统采用了最大比组合(MRC)技术。仿真结果显示了采用BPSK/QPSK/64QAM/32PSK调制技术的两种系统。此外,编码MIMO-Wi-Max系统的误码率性能也描述了传输分集。
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引用次数: 1
A Phase-shift Single Ful1-bridge (PSSB) Converter with Three Shared Leading-legs 具有三个共享引脚的相移单全桥(PSSB)变换器
Pub Date : 2018-03-01 DOI: 10.1109/ICDCSYST.2018.8605069
Jun-jie Zhu, Qinsong Qian, Shengli Lu, Weifeng Sun
This paper proposes a novel PSSB converter with three shared leading-legs. The ZVS of all the primary-side switches can be realized with wide conversion range and full load range. Moreover, the effective duty cycle has nothing to do with the dead-time. Thus, the PSSB would be useful for high switching frequency application. A 100W PSSB converter has been made with GaN transistors and planar transformers to verify the characteristics of PSSB. The experimental results show that the PSSB converter can achieve a peak efficiency of 93.8% when the switching frequency is 300kHz.
本文提出了一种新型的三支共用引脚PSSB变换器。所有一次侧开关的零电压均可实现宽转换范围和满负载范围。此外,有效占空比与死区时间无关。因此,PSSB将是有用的高开关频率的应用。为了验证PSSB的特性,利用GaN晶体管和平面变压器制作了100W的PSSB变换器。实验结果表明,当开关频率为300kHz时,PSSB变换器的峰值效率可达93.8%。
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引用次数: 0
期刊
2018 4th International Conference on Devices, Circuits and Systems (ICDCS)
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