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2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES)最新文献

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Testing Stability of Digital Filters Using Multimodal Particle Swarm Optimization with Phase Analysis 基于相位分析的多模态粒子群算法测试数字滤波器的稳定性
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155601
D. Trofimowicz, T. Stefański
In this paper, a novel meta-heuristic method for evaluation of digital filter stability is presented. The proposed method is very general because it allows one to evaluate stability of systems whose characteristic equations are not based on polynomials. The method combines an efficient evolutionary algorithm represented by the particle swarm optimization and the phase analysis of a complex function in the characteristic equation. The method generates randomly distributed particles (i.e., a swarm) within the unit circle on the complex plane and extracts the phase quadrant of function value in position of each particle. By determining the function phase quadrants, regions of immediate vicinity of unstable zeros, called candidate regions, are detected. In these regions, both real and imaginary parts of the complex function change signs. Then, the candidate regions are explored by subsequently generated swarms. When sizes of the candidate regions are reduced to a value of assumed accuracy, then the occurrence of unstable zero is verified with the use of discrete Cauchy's argument principle. The algorithm is evaluated in four benchmarks for integer- and fractional-order digital filters and systems. The numerical results show that the algorithm is able to evaluate the stability of digital filters very fast even with a small number of particles in subsequent swarms. However, the multimodal particle swarm optimization with phase analysis may not be computationally efficient in stability tests of systems with complicated phase portraits.
本文提出了一种评估数字滤波器稳定性的元启发式方法。所提出的方法是非常普遍的,因为它允许人们评估系统的稳定性,其特征方程不是基于多项式。该方法将以粒子群优化为代表的高效进化算法与特征方程中复函数的相位分析相结合。该方法在复平面上的单位圆内生成随机分布的粒子(即群),并提取每个粒子所在位置函数值的相位象限。通过确定函数相位象限,检测不稳定零点附近的区域,称为候选区域。在这些区域,复函数的实部和虚部都改变符号。然后,候选区域由随后生成的群进行探索。当候选区域的大小减小到假设的精度值时,使用离散柯西参数原理验证了不稳定零的存在。该算法在整数阶和分数阶数字滤波器和系统的四个基准测试中进行了评估。数值结果表明,该算法即使在粒子数量较少的情况下也能快速评估数字滤波器的稳定性。然而,带相位分析的多模态粒子群优化方法在复杂相图系统的稳定性测试中计算效率不高。
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引用次数: 1
Performance Analysis of Convolutional Neural Networks on Embedded Systems 卷积神经网络在嵌入式系统中的性能分析
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155741
Lukasz Grzymkowski, T. Stefański
Machine learning is no longer confined to cloud and high-end server systems and has been successfully deployed on devices that are part of Internet of Things. This paper presents the analysis of performance of convolutional neural networks deployed on an ARM microcontroller. Inference time is measured for different core frequencies, with and without DSP instructions and disabled access to cache. Networks use both real-valued and complex-valued tensors and are tested using different inference engines. We conclude that the system must be tuned in a holistic way to achieve optimal efficiency.
机器学习不再局限于云和高端服务器系统,已经成功部署在物联网的设备上。本文分析了在ARM微控制器上部署卷积神经网络的性能。在不同的核心频率下测量推理时间,有和没有DSP指令和禁用缓存访问。网络使用实值张量和复值张量,并使用不同的推理引擎进行测试。我们的结论是,该系统必须以一种整体的方式进行调整,以达到最佳效率。
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引用次数: 2
Modified Particle Swarm Optimization Algorithm Facilitating Its Hardware Implementation 改进的粒子群优化算法,便于硬件实现
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155802
M. Rajewski, Z. Dlugosz, R. Dlugosz, T. Talaśka
This paper presents various modifications and developments in the PSO algorithm. PSO is an algorithm based on the behavior of swarms. In this work we focus mainly on simplifying the algorithm by replacing random number generators, which can be a problem when implementing algorithms in hardware. We investigate how changing the methods for algorithm updates from random to more deterministic approach influences the results. This paper shows whether it is possible to achieve same as random or better results using a simplified algorithm, which uses simple mathematical operations in the algorithm optimization process.
本文介绍了粒子群算法的各种改进和发展。粒子群优化算法是一种基于群体行为的算法。在这项工作中,我们主要关注通过替换随机数生成器来简化算法,这在硬件中实现算法时可能是一个问题。我们研究了将算法更新的方法从随机方法更改为更确定的方法如何影响结果。本文展示了在算法优化过程中使用简单数学运算的简化算法是否有可能达到与随机相同或更好的结果。
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引用次数: 1
Sensor Design Made by Bosch: Invited Paper 博世传感器设计:特邀论文
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155616
Mike Schwarz
In this paper the sensor design made by Bosch, one of the world's largest supplier of micromechanical sensors in automotive and consumer applications, is briefly introduced. The design is one of the key elements to bridge the different domains between process technology, electronics, system and customers needs. The here presented flow and methodology ensures an integration of all perspectives from prototyping to series production. Examples of typical Sensor/MEMS design including various mechanical and electronical constraints are given.
本文简要介绍了世界上最大的汽车和消费微机械传感器供应商之一博世公司的传感器设计。设计是连接工艺技术、电子、系统和客户需求之间不同领域的关键要素之一。这里介绍的流程和方法确保了从原型到批量生产的所有观点的集成。给出了包括各种机械和电子约束的典型传感器/MEMS设计示例。
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引用次数: 1
Qucs-S/QucsStudio/Octave Schematic Synthesis Tools for Device and Circuit Parameter Extraction from Measured Characteristics qus - s /QucsStudio/用于从测量特性提取器件和电路参数的倍频原理图合成工具
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155727
M. Brinson
A universal technique for the extraction of device parameters or circuit component values from measured performance data is presented. The proposed method can be used by any circuit simulator that implements parameter sweep features and allows user defined tabulated data with independent voltage, or current, sources. A key feature of the reported extraction process is the use of schematic capture simulation icons, with their sweep parameters tabulated as a list of data points, synthesized from CSV measured data. By overlaying simulation output data on top of measured values, then varying user selected parameter/component values and re-simulating repeatable until the two data sets converge, it becomes possible to extract parameter/component values to within a specified error limit. In this paper FOSS circuit simulators Qucs-S/QucsStudio and the numerical analysis package Octave are used to demonstrate the application of the proposed schematic capture synthesis procedure in the investigate of diode inductance at high forward d.c. bias currents and a.c. signal band width.
提出了一种从测量性能数据中提取器件参数或电路元件值的通用技术。所提出的方法可以被任何电路模拟器使用,实现参数扫描功能,并允许用户定义具有独立电压或电流源的表格数据。所报告的提取过程的一个关键特征是使用原理图捕获模拟图标,其扫描参数表化为数据点列表,从CSV测量数据合成。通过将仿真输出数据叠加在测量值之上,然后改变用户选择的参数/组件值,并可重复地重新模拟,直到两个数据集收敛,可以在指定的误差范围内提取参数/组件值。本文利用FOSS电路模拟器qus - s /QucsStudio和数值分析包Octave演示了所提出的原理图捕获合成方法在高正向直流偏置电流和交流信号带宽下二极管电感的研究中的应用。
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引用次数: 0
Low Power Preamplifier for Biomedical Signal Digitization 用于生物医学信号数字化的低功率前置放大器
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155753
N. ALjehani, M. Abbas
This paper presents a low power, low noise preamplifier stage with simple common mode desensitization circuit for dynamic comparators. The target application of the proposed circuit is analog to digital converter for biomedical applications. Adopting TSMC $0.18mu mathrm{m}$ technology, the proposed circuit is designed to work in weak inversion using $mathrm{g}_{mathrm{m}}/mathrm{I}_{mathrm{D}}$ design methodology. The simulation results show that the preamplifier stage consumes less than 32nW using power supply of 0.75V. The input referred noise is $17mumathrm{V}$, DC gain of 43.15dB and unity gain frequency of 300 kHz.
本文提出了一种低功耗、低噪声的前置放大级,具有简单的共模脱敏电路,用于动态比较器。该电路的目标应用是用于生物医学应用的模拟数字转换器。采用台积电$0.18mu mathrm{m}$技术,采用$mathrm{g}_ mathrm{m}}/mathrm{I}_{mathrm{D}}$设计方法设计弱反转电路。仿真结果表明,在0.75V电源下,前置放大级功耗小于32nW。输入参考噪声为$17mu mathm {V}$,直流增益为43.15dB,单位增益频率为300 kHz。
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引用次数: 0
A Survey on the Application of Parametric Amplification in Next Generation Digital RF Transceivers 参数放大技术在下一代数字射频收发器中的应用综述
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155845
Luís Miguel Pires, J. Oliveira
The accelerating growth in mobile networks for data communication, covering a diversity of applications, has originated a high demand not only for low-power devices but also for low-cost System on Chip (SoC). An example of this is the next generation 5G, which is under intense development intending to reach an effective ubiquitous connectivity. CMOS technology offers the best trade-off between costs versus performance and facilitates the co-integration of digital-analog. However, integrating analog RF in recent technology nodes remains a challenge, which has pushed the research towards innovative techniques. One of these techniques is the parametric signal conversion, which can offer high speed and low-noise operation. This paper presents a survey on the application of this technique in modern heterodyne receivers.
移动数据通信网络的加速增长,涵盖了各种应用,不仅对低功耗设备产生了很高的需求,而且对低成本的片上系统(SoC)也产生了很高的需求。这方面的一个例子是下一代5G,它正在大力开发,旨在实现有效的无处不在的连接。CMOS技术提供了成本与性能之间的最佳权衡,并促进了数字模拟的协整。然而,在最近的技术节点中集成模拟射频仍然是一个挑战,这推动了对创新技术的研究。其中一种技术是参数信号转换,它可以提供高速度和低噪声的操作。本文综述了该技术在现代外差接收机中的应用。
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引用次数: 0
Parameter Extraction for a Simplified EKV-model in a 28nm FDSOI Technology 28nm FDSOI工艺中简化ekv模型的参数提取
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155917
Konstantin Bajer, S. Paul, D. Peters-Drolshagen
The $mathrm{g}_{mathrm{m}}/mathrm{I}_{mathrm{D}}$ methodology is applicable for the circuit design in advanced nanometer technologies. This work proposes a systematic parameter extraction process for a simplified EKV-model with only three model parameters which is applicable to all CMOS technologies. The extraction procedure relies only on the drain current for a sweep of the gate voltage without the need of additional extraction simulations in SPICE or parameters from the model card. Therefore, it is independent from the applied technology or the compact model of the SPICE simulation. For devices with short channel lengths, three variations of the EKV model were evaluated which consider velocity saturation. The resulting model provides good results compared to the SPICE simulation over the complete operation region of the technology for long and short channel devices while keeping simplicity for fast tool-based circuit design procedures and hand calculations.
$mathrm{g}_{mathrm{m}}/mathrm{I}_{mathrm{D}}$方法适用于先进纳米技术的电路设计。本文提出了一种适用于所有CMOS技术的简化的只有三个模型参数的ekv模型的系统参数提取过程。提取过程仅依赖于栅极电压扫频的漏极电流,而不需要在SPICE中进行额外的提取模拟或从模型卡中获取参数。因此,它独立于应用技术或SPICE仿真的紧凑模型。对于通道长度较短的设备,考虑速度饱和的三种EKV模型进行了评估。与SPICE模拟相比,所得到的模型在长通道和短通道器件的整个技术操作区域提供了良好的结果,同时保持了快速基于工具的电路设计程序和手动计算的简便性。
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引用次数: 0
Subband Structure and Ballistic Conductance of a Molybdenum Disulfide Nanoribbon in Topological 1T’ Phase: A k·p Study 拓扑1T′相二硫化钼纳米带的亚带结构和弹道电导:k·p研究
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155676
V. Sverdlov, Al-Motasem Bellah El-Sayed, S. Selberherr
We evaluate the subband structure in a narrow nanoribbon of 1T’ molybdenum disulfide by employing an effective $mathrm{k}cdot mathrm{p}$ Hamiltonian. Highly conductive topologically protected edge states whose energies lie within the bulk band gap are investigated. Due to the interaction of the edge modes located at the opposite edges, a small gap in their linear spectrum opens in a narrow nanoribbon. This gap is shown to sharply increase with the perpendicular out-of-plane electric field, in contrast to the behavior in a wide nanoribbon. The gaps between the electron and hole bulk subbands also increase with the electric field. The increase of the gaps between the subbands leads to a rapid decrease of the ballistic nanoribbon conductance and current with the gate voltage, which can be used for designing molybdenum disulfide nanoribbon-based current switches.
我们利用有效的$ mathm {k}cdot mathm {p}$哈密顿量来评价1T '二硫化钼窄纳米带的子带结构。研究了能量位于块带隙内的高导电性拓扑保护边缘态。由于位于相对边缘的边缘模式的相互作用,它们的线性光谱在狭窄的纳米带中打开了一个小的间隙。与宽纳米带的行为相反,这种间隙随着垂直的面外电场而急剧增加。电子和空穴体子带之间的间隙也随着电场的增大而增大。子带间隙的增大导致弹道纳米带的电导和电流随栅极电压的增大而迅速减小,可用于设计基于二硫化钼的纳米带电流开关。
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引用次数: 0
Compact Model for Continuous Microfluidic Mixer 连续型微流控混合器的紧凑模型
Pub Date : 2020-06-01 DOI: 10.23919/MIXDES49814.2020.9155997
Alexi Bonament, Alexis Prel, J. Sallese, M. Madec, C. Lallement
While the development of lab-on-chip is increasing, the lack of dedicated computer-aided design tools appears as a bottleneck preventing the emergence of large-scale industrial applications. One of the answer relied on 50 years of CAD experience in microelectronic. Based on this fact, and using this environment, multi-domain libraries (fluidic, biological, chemical) are to be designed. Among other, the development of efficient compact model for microfluidic devices is a first step toward such design tool. This paper deals with a continuous microfluidic mixer. Our model takes as inputs the flow rates and the concentrations of each fluid to mix and returns the flow rate and the concentration profiles across the channel at its output. The model depends also on some physical parameters (e.g. diffusion coefficient of fluids) and mixing channel geometry. The model is validated by comparison with finite-element simulation performed with COMSOL Multiphysics. Comparisons are made on several cases. We demonstrated that the model gives a good estimation of the concentration profile, with an error of less than 2% compared to the finite element simulator.
虽然芯片实验室的发展越来越多,但缺乏专用的计算机辅助设计工具成为阻碍大规模工业应用出现的瓶颈。其中一个答案依赖于50年的微电子CAD经验。基于这一事实,并利用这一环境,设计了多领域文库(流体、生物、化学)。其中,开发高效紧凑的微流控器件模型是实现这一设计工具的第一步。本文研究了一种连续式微流控混合器。我们的模型将每一种混合流体的流速和浓度作为输入,并在其输出处返回流经通道的流速和浓度曲线。该模型还取决于一些物理参数(如流体的扩散系数)和混合通道的几何形状。通过与COMSOL Multiphysics有限元仿真的对比,验证了模型的正确性。对几个案例进行了比较。我们证明,该模型给出了一个很好的浓度分布估计,与有限元模拟器相比,误差小于2%。
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引用次数: 0
期刊
2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES)
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