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2014 IEEE 5th Latin American Symposium on Circuits and Systems最新文献

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Hardware design of FFT polynomial multipliers FFT多项式乘法器的硬件设计
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820315
Claudia Patricia Renteria-Mejia, A. López-Parrado, Jaime Velasco-Medina
This paper presents the design of two FFT polynomial multipliers using parallel and sequential architectures. Parallel and sequential polynomial multipliers were optimized for throughput and area resources, respectively. The designs are described in generic structural VHDL, synthesized on the Stratix EP4SGX230KF40C2 using Quartus II V. 13, and verified using SignalTap. The hardware synthesis and performance results show that the designed multipliers present a good area-throughput trade-off and they are suitable for high-performance scientific computing applications.
本文介绍了两个FFT多项式乘法器的并行和顺序结构设计。并行多项式乘法器和顺序多项式乘法器分别针对吞吐量和面积资源进行了优化。设计用通用结构VHDL描述,在Stratix EP4SGX230KF40C2上使用Quartus II V. 13进行合成,并使用SignalTap进行验证。硬件综合和性能结果表明,所设计的乘法器具有良好的面积-吞吐量权衡,适用于高性能科学计算应用。
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引用次数: 4
Mixed-signal energy feature extractor of EEG frequency bands 脑电频段混合信号能量特征提取器
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820311
Manuel Carrasco-Robles, M. Delgado-Restituto
This paper proposes a SAR-based circuit suitable to obtain the amount of signal energy contained in EEG frequency bands. It uses a reconfigurable topology which, in a first stage, acts as a conventional data converter for the incoming neural signal and, in a second stage, performs the squaring operation needed for energy extraction. A simple digital circuit keeps track of the most recent outputs from the squarer and provides the accumulated value of the input signal energy. The system has been simulated in an XFAB 0.18μm technology showing correct measurement of the energy.
本文提出了一种适合于获取脑电信号频带所含信号能量的基于sar的电路。它使用可重构的拓扑结构,在第一阶段,作为传入神经信号的传统数据转换器,在第二阶段,执行能量提取所需的平方操作。一个简单的数字电路跟踪从平方器最近的输出,并提供输入信号能量的累积值。该系统已在XFAB 0.18μm技术上进行了仿真,结果表明能量测量是正确的。
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引用次数: 2
A 6-bit 2GS/s CMOS time-interleaved ADC for analysis of mixed-signal calibration techniques 用于分析混合信号校准技术的6位2GS/s CMOS时间交错ADC
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820267
Benjamín T. Reyes, L. Tealdi, German Paulina, Emanuel Labat, R. Sanchez, P. Mandolesi, M. Hueda
A 6-bit 2-GS/s time interleaved (TI) successive approximation register (SAR) analog-to-digital converter (ADC) is designed and fabricated in a 0.13 μm CMOS process. The architecture uses 8 time-interleaved track-and-hold amplifiers (THA), and 16 SAR ADC's. The chip includes (i) a programmable delay cell array to adjust the interleaved sampling phase, and (ii) a 12 Gbps low voltage differential signaling (LVDS) interface. These blocks make the fabricated ADC an excellent platform to evaluate mixed-signal calibration techniques, which are of great interest for application in high-speed optical systems. Measurements of the fabricated ADC show 33.9 dB of peak signal-to-noise-and-distortion ratio (SNDR) and 192 mW of power consumption at 1.2 V.
采用0.13 μm CMOS工艺设计并制作了一个6位2-GS/s时间交错(TI)逐次逼近寄存器(SAR)模数转换器(ADC)。该架构使用8个时间交错跟踪保持放大器(THA)和16个SAR ADC。该芯片包括(i)可编程延迟单元阵列,用于调整交错采样相位,以及(ii) 12 Gbps低压差分信号(LVDS)接口。这些模块使制作的ADC成为评估混合信号校准技术的良好平台,这对高速光学系统的应用有很大的兴趣。测量结果显示,该ADC在1.2 V电压下的峰值信噪比为33.9 dB,功耗为192 mW。
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引用次数: 10
New approach to block-level 3D IC layout design 块级3D集成电路版图设计的新方法
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820326
K. Grzesiak-Kopeć, M. Ogorzałek
Computer-aided 3D ICs layout design requires effective search of discontinuous and large spaces of possible solutions. There are no deterministic algorithms able to perform the task. This paper presents a new approach to block-level 3D IC layout design. A simple shape grammar generates possible design solutions. Design specific knowledge is represented as goals and constraints that are both given in the form of predicates. The solution space exploration is driven by an intelligent derivation controller. The proposed concept undergoes practical verification and is illustrated with an example generated by a dedicated application PerfectShape.
计算机辅助的三维集成电路布局设计需要有效地寻找不连续的、大空间的可能解。没有确定的算法能够执行这项任务。本文提出了一种块级三维集成电路版图设计的新方法。简单的形状语法生成可能的设计解决方案。特定于设计的知识表示为目标和约束,它们都以谓词的形式给出。求解空间探索由智能派生控制器驱动。提出的概念经过了实际验证,并通过专用应用程序PerfectShape生成的示例进行了说明。
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引用次数: 1
Ginga MiddleWare on a SoC for Digital Television Set-Top Box 数字电视机顶盒SoC上的Ginga中间件
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820290
Bruno Policarpo Toledo Freitas, A. Susin, A. Bonatto
This paper presents the porting of the Ginga MiddleWare onto a Digital Television System-on-Chip. Ginga is an open-source software layer compliant to the Brazilian Digital Television Standard. The porting of Ginga is being carried out on a home made FPGA platform containing a Leon-3 processor running Linux, and the implemented audio and video decoders and graphics processing engine. The SoC has an external memory to store reference frames, OS and Ginga, user interface and applications with local and remote interactivity. Furthermore, accelerators are being designed to boost the SoC performance by implementing in hardware the most processor demanding Ginga primitives, with the profiling being made on a Ginga Virtual machine, therefore creating a “Ginga-Ready” platform.
本文介绍了将Ginga中间件移植到数字电视片上的方法。Ginga是一个符合巴西数字电视标准的开源软件层。Ginga的移植是在一个自制的FPGA平台上进行的,该平台包含一个运行Linux的Leon-3处理器,以及实现的音频和视频解码器和图形处理引擎。SoC有一个外部存储器来存储参考帧,操作系统和Ginga,用户界面和本地和远程交互的应用程序。此外,加速器的设计是为了通过在硬件上实现对处理器要求最高的Ginga原语来提高SoC性能,并在Ginga虚拟机上进行分析,从而创建一个“Ginga- ready”平台。
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引用次数: 0
Chaotic inductively coupled non-PLL low emission transmitter for implanted devices 用于植入器件的混沌电感耦合非锁相环低发射发射机
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820295
Ruchir Saraswat, E. Rodríguez-Villegas
The current work proposes a low emission frequency shift keying (FSK) non-PLL based modulator for transmitting neural signals. FSK has been shown to be viable alternative to widely used ASK (Amplitude Shift Keying). Designers need to start developing low Electromagnetic Interference (EMI) algorithms for implanted devices so as to minimize interference. The proposed algorithm utilizes a ramp to modulate the bit stream from the neural amplifier. The encoded signal is further non-linearly modulated ensuring a lower peak in the power spectrum, a measure of electromagnetic interference. The propose circuit has been fabricated in 0.18μm AMS technology.
目前的工作提出了一种用于传输神经信号的低发射频移键控(FSK)非锁相环调制器。FSK已被证明是广泛使用的ASK(幅度移位键控)的可行替代方案。设计人员需要开始为植入设备开发低电磁干扰(EMI)算法,以尽量减少干扰。该算法利用斜坡调制来自神经放大器的比特流。编码后的信号进一步进行非线性调制,以确保功率谱(电磁干扰的测量指标)中的峰值较低。该电路采用0.18μm AMS工艺制作。
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引用次数: 0
Predictive DTC algorithm for induction machines using Sliding Horizon Prediction 基于滑动水平预测的感应电机预测直接转矩控制算法
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820265
J. Rengifo, J. Aller, A. Berzoy, J. Restrepo
This paper presents a predictive direct torque control PDTC algorithm for induction machine drives including a Sliding Horizon Prediction (SH-PDTC). The selected strategy for the SH-PDTC algorithm was to keep the motor torque and stator flux-linkage within predefined hysteresis bounds while reducing inverter switching losses. The proposed SH-PDTC algorithm shows better performance in torque and stator flux-linkage control in comparison with classical PDTC, without increasing power losses in the inverter. A sensitivity analysis allows to evaluate algorithm performance under parameter uncertainty, and the results show that SH-PDTC keeps torque ripple performance. The paper includes a simulation to verify the PDTC and SH-PDTC algorithms controlling an induction machine, with a standard two level inverter.
提出了一种基于滑动水平预测(SH-PDTC)的感应电机直接转矩预测控制算法。SH-PDTC算法选择的策略是在降低逆变器开关损耗的同时,使电机转矩和定子磁链保持在预定的滞环范围内。本文提出的SH-PDTC算法在不增加逆变器功率损耗的前提下,具有更好的转矩和定子磁链控制性能。灵敏度分析可以评估算法在参数不确定性下的性能,结果表明SH-PDTC保持了转矩脉动性能。本文通过仿真验证了PDTC和SH-PDTC算法对感应电机的控制,并采用标准的双电平逆变器。
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引用次数: 9
SICARELO: A tool for synthesis of locally-clocked extended burst-mode asynchronous Controllers SICARELO:一个用于合成本地时钟扩展突发模式异步控制器的工具
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820270
T. Curtinhas, D. L. Oliveira, D. Bompean, L. Faria, L. Romano
Controllers based on Synchronous Finite State Machines (SFSM) are widely used in the control unit design of complex digital systems. These systems can present critical requirements, such as power consumption, robustness, speed, etc. In this context, the asynchronous paradigm shows interesting features that fit as an alternative for the design, but the lack of appropriate tools and the high difficulty of the design are already drawbacks. This paper proposes a new tool called SICARELO to automatic synthesis of asynchronous FSMs with local clock. The existence of a local clock reduces the requirements of asynchronous logic, enabling the synthesis in any PLD, such as CPLDs and FPGAs, without the need of satisfying any type of macro-cells mapping. The proposed tool starts from a popular specification known as Extended Burst Mode (XBM). The tool SICARELO was tested on a set of benchmarks, compared with 3D and Minimalist tools that are state of the art. SICARELO tool obtained a reduction media in the combinatorial logic of 32% of products and 25% of literals in the XBM_AFSM synthesis with local clock.
基于同步有限状态机(smfsm)的控制器广泛应用于复杂数字系统的控制单元设计。这些系统可以提出关键要求,如功耗、健壮性、速度等。在这种情况下,异步范式显示了适合作为设计替代方案的有趣特性,但是缺乏适当的工具和设计的高难度已经成为缺点。本文提出了一种新的工具SICARELO,用于自动合成具有本地时钟的异步fsm。本地时钟的存在降低了异步逻辑的要求,使合成在任何PLD,如cpld和fpga,而不需要满足任何类型的宏单元映射。这个被提议的工具从一个被称为扩展突发模式(XBM)的流行规范开始。SICARELO工具在一系列基准测试中进行了测试,并与3D和极简主义工具进行了比较。SICARELO工具在具有局部时钟的XBM_AFSM合成中获得了32%的产物和25%的文字组合逻辑的还原介质。
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引用次数: 11
Piezoresistive cantilever platform for label-free detection of molecules 用于无标签分子检测的压阻悬臂平台
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820319
Bahareh Gholamzadeh, E. Ghafar-Zadeh, F. Awwad, M. Sawan
MEMS sensors can be used for label-free detection in many different biological studies. Usually in this procedure the presence of special substance in a sample can be monitored based on its interaction and binding with specific probe molecules which are immobilized on a sensor. These interactions will result into variations which can be detected by biosensors. Developing a low cost, high throughput system for performing label-free detection can be beneficial for different studies. This type of platform can be used for real-time detection of multiple molecules with high sensitivity. As a first step towards developing such platform, in this paper we present a label-free detection system using an array of 30 cantilevers implemented through standard MEMS foundry process (MetalMUMPs). Herein, we discuss the design, fabrication, and characterization results of the proposed platform using electrical and interferometry techniques. The results from simulations have shown that sensors can be used for measuring small forces in range of nN and pN and the characterization tests have proven that sensors are functional and they are ready to be used in biological experiments.
MEMS传感器可用于许多不同的生物学研究中的无标签检测。通常在这个过程中,可以根据样品中特殊物质与固定在传感器上的特定探针分子的相互作用和结合来监测样品中特殊物质的存在。这些相互作用将导致生物传感器可以检测到的变化。开发一种低成本、高通量的无标签检测系统对不同的研究都是有益的。该平台可用于多分子实时检测,灵敏度高。作为开发此类平台的第一步,在本文中,我们提出了一种无标签检测系统,该系统使用30个悬臂阵列,通过标准MEMS铸造工艺(MetalMUMPs)实现。在此,我们讨论了设计,制造,并提出了使用电子和干涉测量技术的平台的表征结果。模拟结果表明,传感器可用于测量nN和pN范围内的小力,表征测试已证明传感器是功能性的,它们已准备好用于生物实验。
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引用次数: 3
Exploring pel decimation to trade off between energy and quality in video coding 探索在视频编码中实现能量和质量平衡的像素抽取方法
Pub Date : 2014-05-26 DOI: 10.1109/LASCAS.2014.6820316
Ismael Seidel, André Beims Bräscher, M. Monteiro, Jose Luis Giintzel
This work investigates the trade-offs between energy and quality in video coding when pel decimation is applied. Realistic estimates for area and energy per block were obtained by simulating five different architectures specially designed to compute the Sum of Absolute Differences (SAD) for 4×4 pixel blocks. Among these architectures, one can be configured to operate with 1:1, 4:3, 2:1 or 4:1 sample ratios, whereas the rest are tailored to operate exclusively with each one of those ratios. The five VLSI architectures were logically synthesized for a 45 nm industrial standard cell library for a target frequency and also for the maximum achievable frequency. They were also simulated with 100 k input vectors obtained by using an H.264/AVC encoder running on one full HD (1080p) video sample. The obtained results show that by using the configurable architecture with full sampling, the best energy/block result was 3.54 pJ/block (60% better than the non-configurable with 7.08 pJ/block). The energy/block value can be further reduced until 1.34 pJ/block at the cost of 2.8% in PSNR, on average, and 14.1% in SSIM, on average.
本文研究了在应用像素抽取时视频编码中能量和质量之间的权衡。通过模拟五种不同的架构来计算4×4像素块的绝对差和(SAD),获得了每个块的面积和能量的真实估计。在这些体系结构中,一个可以配置为1:1、4:3、2:1或4:1的样本比例,而其余的则被定制为只使用这些比例中的每一个。这五种VLSI架构是为45纳米工业标准单元库逻辑合成的,用于目标频率和最大可实现频率。它们还通过在一个全高清(1080p)视频样本上运行的H.264/AVC编码器获得的100 k输入向量进行模拟。结果表明,采用全采样的可配置结构,最佳能量/块为3.54 pJ/块(比不可配置结构的7.08 pJ/块提高60%)。能量/块值可以进一步降低到1.34 pJ/块,平均PSNR为2.8%,平均SSIM为14.1%。
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引用次数: 7
期刊
2014 IEEE 5th Latin American Symposium on Circuits and Systems
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