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2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)最新文献

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A simple class-D audio power amplifier using a passive CT ΣΔ modulator for medium quality sound systems 一个简单的d类音频功率放大器,使用无源CT ΣΔ调制器,用于中等质量音响系统
J. D. Melo, Pedro V. Leitão, J. Goes, N. Paulino
This paper presents a class-D power amplifier for medium quality sound systems using a second-order passive sigma-delta modulator (ΣΔM). The ΣΔM controls an output power stage consisting of a H-bridge. The loop filter of the ΣΔM was designed using a optimization procedure based on genetic algorithm (GA), that takes into account several parameters. This system was implemented using discrete components and the experimental results show that a DR of 75 dB is achieved with a peak signal-to-noise-plus-distortion ratio (SNDR) of 54 dB.
本文介绍了一种使用二阶无源σ - δ调制器的中等质量音响系统的d类功率放大器(ΣΔM)。ΣΔM控制一个由h桥组成的输出功率级。采用基于遗传算法的优化程序设计了ΣΔM的环路滤波器,该优化程序考虑了多个参数。该系统采用离散元件实现,实验结果表明,在峰值信噪比(SNDR)为54 dB的情况下,实现了75 dB的DR。
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引用次数: 0
Artificial neural networks in accelerometer-based human activity recognition 基于加速度计的人类活动识别中的人工神经网络
Paula Lubina, M. Rudzki
This paper presents a study aimed to assess applicability of artificial neural networks (ANNs) in human activity recognition from simple features derived from accelerometric signals. Secondary goal was to select the most descriptive signal features and sensor locations to be used as inputs to ANNs. Five triaxial accelerometers were attached to human body in the following places: one at back, two at waist laterally and two at both ankles. The set of activities to be recognized was established to include the most often performed actions in home environment. In total 25 subjects performed a set of predefined actions like walking, going up and down the stairs, sitting down and standing up from a chair. Acquired signals were divided into 0.5s time windows by a label defining the action performed. Several statistical signal features were calculated and used to train ANNs. Learning and testing were performed on separate data sets. Analysis using Fisher Linear Discriminant showed that despite the fact that some of the calculated values play a significant role in the distinction between similar activities, none of the features or sensors could be omitted in the recognition of the activities considered in the study. Accuracy of 97% has been achieved for discriminating sitting and walking, 89% for standing, 72-75% for walking the stairs. Transient actions like standing up and sitting down have been detected with accuracy 56% and 38%, respectively. Even though there are studies declaring higher accuracy, none of them considered a set of activities analyzed in this research.
本文提出了一项研究,旨在评估人工神经网络(ANNs)在从加速度信号中提取的简单特征中识别人类活动的适用性。第二个目标是选择最具描述性的信号特征和传感器位置作为人工神经网络的输入。五个三轴加速度计安装在人体的以下位置:一个在背部,两个在腰部侧面,两个在脚踝两侧。要识别的活动集包括家庭环境中最常执行的动作。总共有25名受试者完成了一系列预先设定好的动作,比如走路、上下楼梯、从椅子上坐下来和站起来。通过定义动作的标签将采集到的信号划分为0.5s的时间窗。计算了几种统计信号特征,并将其用于训练人工神经网络。在不同的数据集上进行学习和测试。使用Fisher线性判别法分析表明,尽管某些计算值在区分类似活动方面发挥了重要作用,但在研究中考虑的活动的识别中,没有一个特征或传感器可以被省略。该算法对坐着和走路的识别准确率达到97%,对站立的识别准确率达到89%,对走楼梯的识别准确率达到72-75%。像站起来和坐下这样的短暂动作的检测准确率分别为56%和38%。尽管有研究宣称更高的准确性,但它们都没有考虑到本研究中分析的一系列活动。
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引用次数: 13
Static and dynamic energy losses vs. temperature in different CMOS technologies 不同CMOS技术的静态和动态能量损耗与温度的关系
Piotr Kocanda, A. Kos
The aim of this paper is energy dissipation analysis in regards to supply voltage and temperature. The basis of all simulations are 12 different transistors coming from 6 different CMOS technologies (from 180nm to 14nm). Dynamic energy used to switch a gate from one state to the other was evaluated in a range of temperature for different supply voltages. In order to guarantee a realistic timing of control signals a special testing circuit was designed. Change of dynamic energy, as a function of temperature, regardless of supply voltage fits in range of -0.5-7.3%. Static power dissipation, a result of existing leakage currents, rises with temperature. When temperature rises from 20 to 100°C static power multiplicities at least 3 times up to 85 times. When operating with low activity static energy consumptions has higher impact on total energy consumption. In most cases one cannot ignore temperature influence on energy consumption.
本文的目的是对电源电压和温度下的能量耗散进行分析。所有模拟的基础是来自6种不同CMOS技术(从180nm到14nm)的12个不同的晶体管。在不同电源电压的温度范围内,对栅极从一种状态切换到另一种状态的动态能量进行了评估。为了保证控制信号的真实时序,设计了专用的测试电路。动态能量的变化,作为温度的函数,与电源电压无关,适用于-0.5-7.3%的范围。由于存在泄漏电流,静态功耗随温度升高而升高。当温度从20°C上升到100°C时,静电倍率至少为3倍至85倍。低活度运行时,静态能耗对总能耗的影响较大。在大多数情况下,人们不能忽视温度对能源消耗的影响。
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引用次数: 5
Design and measurement methodology for a sub-picoampere current digitiser 亚皮安电流数显仪的设计与测量方法
E. Voulgari, M. Noy, F. Anghinolfi, F. Krummenacher, M. Kayal
This paper introduces some design and measurement techniques that were used in the design and the testing of an ASIC for ultra-low current sensing. The idea behind this paper is to present the limitations in sub-picoampere current measurements and demonstrate an ASIC that can accurately measure the different sources of leakage currents and the methodology of measuring. Then the leakage current can be subtracted or compensated in order to accurately measure the ultra-low current that is generated from a sensor/detector. The proposed ASIC can measure currents as low as -50 fA, a value well below similar ASIC implementations.
本文介绍了一种用于超低电流传感的专用集成电路的设计和测试所采用的一些设计和测量技术。本文的思想是提出亚皮安电流测量的局限性,并展示了一种能够准确测量不同泄漏电流源和测量方法的ASIC。然后可以减去或补偿泄漏电流,以便准确测量从传感器/检测器产生的超低电流。所提出的ASIC可以测量低至-50 fA的电流,远低于类似的ASIC实现。
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引用次数: 6
A deep-submicron CMOS flow for general-purpose timing-detection insertion 用于通用时序检测插入的深亚微米CMOS流
Andreas Dixius, D. Walter, S. Höppner, H. Eisenreich, R. Schüffny
This paper introduces a design independent extension to RTL-to-GDS design-flows for seamless insertion of timing-detection flip-flops at critical paths of a digital CMOS standard-cell circuit. It is possible to detect timing-errors for general purposes at any critical path including enable-inputs of clock-gating cells with typically 15% area overhead for 20% endpoint coverage while maintaining DFT capability. To ensure matching of critical-path endpoints and detector cells 3 incremental place &route iterations are needed on average.
介绍了一种独立于设计的RTL-to-GDS设计流程的扩展,用于在数字CMOS标准单元电路的关键路径上无缝插入时序检测触发器。在保持DFT功能的同时,可以在任何关键路径上检测一般用途的定时错误,包括时钟门控单元的启用输入,通常具有15%的面积开销和20%的端点覆盖率。为了保证关键路径端点与检测单元的匹配,平均需要3次增量位置和路径迭代。
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引用次数: 0
Low chip area, low power dissipation, programmable, current mode, 10-bits, SAR ADC implemented in the CMOS 130nm technology 低芯片面积,低功耗,可编程,电流模式,10位,在CMOS 130nm技术实现的SAR ADC
R. Dlugosz, G. Fischer
In this paper we present a novel successive approximation register (SAR) analog-to-digital converter (ADC) designed for the applications that demand many such converters working in parallel in a single chip. For this reason we have put a special emphasis on a very low chip area and low power dissipation. The ADC operates in the current-mode. The digital-to-analog converter (DAC), which is one of the components of the SAR ADCs, is in this case based on a concept of a two-stage split architecture that allows to obtain higher resolutions without a substantial increase of the chip area. As a result, the circuit implemented in the IHP CMOS 130nm technology occupies the area of only 0.01 mm2. At data rate of 0.55 MSamples/s and 10-bits of resolution it dissipates an average power of 13.2 μW. The supply voltage equals 1.2 V. The proposed circuit is programmable. The 2-stage DAC is composed of 10 branches. If smaller resolutions are sufficient, we can select the branches which are used to perform the conversion. This allows to control, to some extent, data rate of the ADC and the power dissipation.
在本文中,我们提出了一种新的逐次逼近寄存器(SAR)模数转换器(ADC),设计用于需要在单个芯片上并行工作的许多此类转换器的应用。由于这个原因,我们特别强调极低的芯片面积和低功耗。ADC工作在电流模式。数模转换器(DAC)是SAR adc的组件之一,在这种情况下,它基于两级拆分架构的概念,可以在不大幅增加芯片面积的情况下获得更高的分辨率。因此,采用IHP CMOS 130nm技术实现的电路占地面积仅为0.01 mm2。数据速率为0.55 MSamples/s,分辨率为10位,平均功耗为13.2 μW。电源电压为1.2 V。该电路是可编程的。二级DAC由10个支路组成。如果较小的分辨率足够,我们可以选择用于执行转换的分支。这允许在一定程度上控制ADC的数据速率和功耗。
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引用次数: 7
Leakage current compensation for a 450 nW, high-temperature, bandgap temperature sensor 450nw高温带隙温度传感器漏电流补偿
J. Nilsson, J. Borg, J. Johansson
The design of a 450nW bandgap temperature sensor in the 0 to 175°C range is presented. The design demonstrates a leakage current compensation technique that is useful for low-power designs where transistor performance is limited. The technique mitigates the effects of leakage in Brokaw bandgap references by limiting the amount of excess current that is entering the bases of the main bipolar pair due to leakage. Using this technique, Monte Carlo simulations show an improvement factor of 7.6 for the variation of the temperature sensitivity over the full temperature range. For the variation of the reference voltage, Monte Carlo simulations show an improvement factor of 2.3. Sensors built using this technique can be used to accurately monitor the temperature of power semiconductors since wireless temperature sensors become feasible with sufficiently low power consumption.
介绍了一种450nW带隙温度传感器的设计,工作范围为0 ~ 175°C。该设计演示了泄漏电流补偿技术,该技术适用于晶体管性能有限的低功耗设计。该技术通过限制由于泄漏而进入主双极对基极的过量电流,减轻了布罗考带隙参考中泄漏的影响。使用这种技术,蒙特卡罗模拟显示,在整个温度范围内,温度灵敏度变化的改进系数为7.6。对于参考电压的变化,蒙特卡罗模拟表明改进因子为2.3。利用这种技术制造的传感器可以精确地监测功率半导体的温度,因为无线温度传感器在足够低的功耗下是可行的。
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引用次数: 4
Logic controller design system supporting UML activity diagrams 逻辑控制器设计系统支持UML活动图
M. Grobelny, I. Grobelna
The paper introduces a logic controller design system, called PNAD, supporting UML activity diagrams in version 2.x as a semi-formal specification technique. The system enables transformation of activity diagrams into control Petri nets, their formal verification using model checking technique and the nuXmv tool, generation of synthesizable code in hardware description language VHDL and generation of C code for microcontrollers. The benefits include the support for discrete event system development since the specification till prototype implementation. Additionally, reverse transformation from control Petri nets into UML activity diagrams is also possible. The internal representation of diagrams is based on XML files. The usage of proposed system is illustrated on an example of concrete production process.
本文介绍了一个逻辑控制器设计系统,称为PNAD,支持UML活动图的版本2。X作为一种半正式的规范技术。该系统能够将活动图转换为控制Petri网,使用模型检查技术和nuXmv工具对其进行形式化验证,用硬件描述语言VHDL生成可合成代码,并为微控制器生成C代码。其好处包括支持从规范到原型实现的离散事件系统开发。另外,从控制Petri网到UML活动图的反向转换也是可能的。图的内部表示是基于XML文件的。以混凝土生产过程为例,说明了该系统的应用。
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引用次数: 5
An efficient post-processing method for pipelined pseudo-random number generator in SoC-FPGA 基于SoC-FPGA的流水线伪随机数生成器的一种高效后处理方法
P. Dabal, R. Pelka
Pseudo-random number generators (PRNGs) are one of the common parts of digital systems used in cryptography, diagnostics, simulation and in many other areas of modern science and technology. Here we present a novel architecture of the PRNG based on the chaotic nonlinear model and pipelined data processing. A significant enhancement in terms of output throughput has been achieved by combining the advantages of pipelining with post-processing based on fast logical operations like bit shifting and XOR. The proposed method has been implemented using programmable SoC Zynq device from Xilinx and verified by standard statistical tests NIST SP800-22. For PRNGs based on the logistic chaotic map and frequency dependent negative resistance (FDNR) we obtained speed-up factors equal to 33% and 14%, respectively. We also present detailed comparison of the proposed post-processing method with the methods reported previously by the other authors. In particular, we compared the maximum output throughput and amount of total logical resources required by PRNG implementation in the programmable SoC device. The maximum output throughput of the proposed PRNG is equal to 38.44 Gbps and is significantly greater comparing to the chaotic PRNGs described so far.
伪随机数发生器(prng)是用于密码学、诊断、仿真和许多其他现代科学技术领域的数字系统的常见部件之一。本文提出了一种基于混沌非线性模型和流水线数据处理的PRNG结构。通过将流水线的优势与基于快速逻辑操作(如位移位和异或)的后处理相结合,在输出吞吐量方面实现了显著的增强。该方法已在赛灵思公司的可编程SoC Zynq器件上实现,并通过标准统计测试NIST SP800-22进行了验证。对于基于logistic混沌映射和频率相关负电阻(FDNR)的prng,我们分别获得了33%和14%的加速因子。我们还详细比较了所提出的后处理方法与其他作者先前报道的方法。特别是,我们比较了可编程SoC器件中PRNG实现所需的最大输出吞吐量和总逻辑资源量。所提出的PRNG的最大输出吞吐量等于38.44 Gbps,与目前描述的混沌PRNG相比显着提高。
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引用次数: 2
Challenges for analog circuits in sub-100 nm CMOS nodes 亚100nm CMOS节点模拟电路的挑战
Bernd Landgraf
New challenges are arising with the entrance in sub-100 nm CMOS nodes. Dominant sources of the MOSFET leakage which differ from those of previous nodes are examined. Consequences for the analog circuit design due to smaller dimensions and an accompanying higher variance of important analog parameters like threshold voltage in combination with shrinking VDD headroom are highlighted. As an example, the matching behavior of long channel and short channel halo-doped MOSFETS is examined. Furthermore, the disadvantages of the BEOL (Back End Of Line) due to the smaller dimensions are analyzed. Especially the reliability requirements of these BEOL design rules are discussed. Consequences on the layout are demonstrated by applying an EM & IR drop tool.
随着sub- 100nm CMOS节点的进入,出现了新的挑战。研究了不同于以往节点的MOSFET泄漏的主要来源。由于更小的尺寸和随之而来的重要模拟参数(如阈值电压)的更高方差以及VDD净空的缩小,对模拟电路设计的影响得到了强调。作为一个例子,研究了长通道和短通道掺杂的mosfet的匹配行为。此外,还分析了BEOL(后端线)由于尺寸较小而存在的缺点。重点讨论了这些BEOL设计规则的可靠性要求。通过应用EM & IR拖放工具演示了对布局的影响。
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引用次数: 1
期刊
2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)
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