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2007 50th Midwest Symposium on Circuits and Systems最新文献

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From (integrated) circuits to systems of systems on chip in five decades: How did and will (IC) test technology keep up? 五十年来从集成电路到片上系统的系统:(IC)测试技术是如何以及将如何跟上?
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488835
A. Ivanov
The past five decades amount to mind boggling progress in IC design and manufacturing technology. In this period, we have gone from the inception of ICs to now what literally amounts to the integration of systems of systems on chip. Whereas experts debate the continued evolution of ICs according to Moore's law beyond the next decade, the advent of the complex integration of multi-physics systems is just in its infancy and is predicted to grow exponentially in the coming years. Designing and manufacturing complex ICs is of course a feat in itself. Testing and testability has often been taken for granted as a necessary (not to say evil) requirement. But who wants of an IC that cannot be duly tested, to ensure quality and reliability, especially when deployed in life-critical applications? Test technology, along with design technology has had to make enormous and rapid progress over the past half-century. Here, we highlight some of the key elements of IC test technology. We briefly mention some directions and challenges and opportunities for test technology in the near future, especially as multi-physics integrated systems of systems continue to emerge and progress on the volume production curves.
在过去的50年里,集成电路设计和制造技术取得了令人难以置信的进步。在这一时期,我们已经从ic的初始阶段发展到现在的芯片上系统的集成。尽管专家们对未来十年根据摩尔定律的集成电路的持续发展争论不休,但多物理场系统复杂集成的出现才刚刚起步,预计在未来几年将呈指数级增长。设计和制造复杂的集成电路本身就是一项壮举。测试和可测试性通常被认为是必要的(不是邪恶的)需求。但是,谁想要一个不能经过适当测试的集成电路,以确保质量和可靠性,特别是当部署在生命关键的应用中时?在过去的半个世纪里,测试技术与设计技术一起取得了巨大而迅速的进步。在这里,我们重点介绍了IC测试技术的一些关键要素。我们简要地提到了测试技术在不久的将来的一些方向、挑战和机遇,特别是随着多物理场集成系统的不断出现和在量产曲线上的进展。
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引用次数: 3
A CMOS based microfluidic detector: Design, calibration and experimental results 一种基于CMOS的微流控探测器:设计、校准和实验结果
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488568
E. Ghafar-Zadeh, M. Sawan, M. Hajj-Hassan, M. A. Miled
In this paper, we describe a 0.18 mum CMOS capacitive sensor for microfluidic applications. This sensor features an interface circuit, which is incorporated with a calibration circuitry. We present the design and thereafter simulation and experimental results in the support of discussed issues throughout this paper. The proposed interface circuit offers the advantage of low complexity as well as sub femto Farad resolution.
本文介绍了一种用于微流体应用的0.18 μ m CMOS电容式传感器。该传感器具有接口电路,该接口电路与校准电路相结合。我们给出了设计和随后的仿真和实验结果,以支持本文所讨论的问题。所提出的接口电路具有低复杂度和亚飞法拉分辨率的优点。
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引用次数: 6
A hardware/software cooperative approach for reducing memory traffic in application-specific instruction set processors 一种硬件/软件协作方法,用于减少特定于应用程序的指令集处理器中的内存流量
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488784
Yunsi Fei, Hai Lin, Xuan Guan
Application-specific instruction set processor (ASIP) has emerged as an important design choice for embedded systems. It can achieve both high flexibility offered by the base processor core and high performance and energy-efficiency offered by the dedicated hardware extensions. Although a lot of efforts have been devoted to computation acceleration (e.g., automatic custom instruction identification and synthesis), the limited on-chip data storage elements, including the register file and data cache, have become a potential performance bottleneck. In this paper, we propose a hardware/software cooperative approach to utilize the custom registers for reducing the data traffic between the processor and memory through efficient communications between the base processor core and custom hardware extensions. Our experimental results demonstrate that promising performance improvements can be achieved.
专用指令集处理器(ASIP)已成为嵌入式系统设计的重要选择。它既可以实现基本处理器核心提供的高灵活性,又可以实现专用硬件扩展提供的高性能和高能效。尽管在计算加速(例如,自动自定义指令识别和合成)方面已经做出了很多努力,但有限的片上数据存储元件,包括寄存器文件和数据缓存,已经成为潜在的性能瓶颈。在本文中,我们提出了一种硬件/软件合作的方法,利用自定义寄存器通过基本处理器核心和自定义硬件扩展之间的有效通信来减少处理器和存储器之间的数据流量。我们的实验结果表明,可以实现有希望的性能改进。
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引用次数: 0
Separation of complex signals with known source distributions in time-varying channels using optimum complex block adaptive ICA 利用最优复块自适应ICA分离时变信道中已知源分布的复信号
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488606
R. Ranganathan, Thomas T. Yang, W. Mikhael
This paper presents a novel realization of the complex block adaptive independent component analysis algorithm. The algorithm optimally updates the real and imaginary components of the weight vector independently. The new implementation is employed for the separation of complex signals with known source distributions, a scenario frequently encountered in practice. Under time-varying channel conditions, the performance of the proposed method is compared with the widely known Complex Fast-ICA. Simulation results show that this new technique exhibits superior performance in time varying channel conditions in terms of convergence speed. In addition, the performance of the proposed method is independent of the processing block length and is achieved without any additional cost in computational complexity.
本文提出了一种复杂分块自适应独立分量分析算法的新实现。该算法最优地独立更新权向量的实、虚分量。新的实现用于分离具有已知源分布的复杂信号,这是在实践中经常遇到的情况。在时变信道条件下,将该方法的性能与著名的Complex Fast-ICA进行了比较。仿真结果表明,该方法在时变信道条件下具有较好的收敛速度。此外,该方法的性能与处理块长度无关,并且在计算复杂度方面没有任何额外的成本。
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引用次数: 3
Design trade-offs for load/store buffers in embedded processing environments 在嵌入式处理环境中设计负载/存储缓冲区的权衡
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488819
Y. Kang, J. Draper
Memory latency is a critical issue for conventional high-speed computing platforms, and it is becoming a common problem in embedded and CMP (chip multiprocessing) systems as well. Conventional processors typically adopt caches and a load/store queue (LSQ) to address the processor-to-memory bottleneck. However, the conventional LSQ design, which has a large number of entries, is not appropriate for embedded systems due to its area and power hungry out-of- order speculation. A compact, low-power load/store buffer that also provides significant performance improvement is essential for such systems. In this paper, we propose an area-efficient wideword load/store buffer (WLSB) which supports both WideWord (256-bit) and scalar (32-bit) load/store instructions for a recently fabricated PIM (processing-in-memory) device. Given its small size, the 4 entry WLSB yields a 57.33% load hit rate on SPEC2K benchmarks. This result is 5.72% better as compared to a less area-efficient 32-entry fully associative scalar load/store buffer (SLSB). The WLSB was synthesized in IBM 90 nm technology, and the resulting implementation occupies less than a seventh of a square mm and is projected to run at 1.6 ns cycle time with 15.72 mW of dynamic power dissipation. This paper demonstrates how this very small-entry buffer can affect the load hit rate and quantifies the design trade-offs between wide small-entry and narrow large-entry buffers with respect to size, power, load hit ratio and clock speed. Although this WLSB has been specifically designed to benefit a PIM architecture, it is expected to be useful for other embedded processing platforms and CMPs due to emphasized area/power constraints.
内存延迟是传统高速计算平台的一个关键问题,并且在嵌入式和芯片多处理(CMP)系统中也成为一个普遍问题。传统处理器通常采用缓存和加载/存储队列(LSQ)来解决处理器到内存的瓶颈。然而,传统的LSQ设计具有大量的条目,由于其面积和功耗的失序推测而不适合嵌入式系统。紧凑、低功耗的负载/存储缓冲器也提供了显著的性能改进,这对此类系统至关重要。在本文中,我们提出了一种面积高效的宽字加载/存储缓冲区(WLSB),它支持宽字(256位)和标量(32位)加载/存储指令,用于最近制造的PIM(内存中处理)设备。考虑到它的小尺寸,4条目WLSB在SPEC2K基准测试中产生57.33%的负载命中率。与面积效率较低的32项全关联标量加载/存储缓冲区(SLSB)相比,这个结果好5.72%。WLSB是在IBM 90nm技术中合成的,最终实现占地不到七分之一平方毫米,预计运行周期为1.6 ns,动态功耗为15.72 mW。本文演示了这个非常小的入口缓冲区如何影响负载命中率,并量化了宽的小入口缓冲区和窄的大入口缓冲区在大小、功率、负载命中率和时钟速度方面的设计权衡。虽然这个WLSB是专门为PIM架构设计的,但由于强调面积/功率限制,它预计对其他嵌入式处理平台和cmp也很有用。
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引用次数: 0
A low noise 13 GHz power efficient 16/17 prescaler with rail to rail output amplitude 低噪声13 GHz功率高效16/17预分频器,轨到轨输出幅度
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488621
E. Eschenko, M. S. Candidate, K. Entesari
A state of the art 16/17 prescaler using current mode logic (CML) D-Flip Flops, CMOS inverters, and transmission gates for the .18mu TSMC process with a 1.8 V supply voltage is presented. The prescaler consists of a 4/5 synchronous core and a feedback loop which modulates the 4/5 core to produce a division ratio of 16/17. Instead of employing power hungry CML, the feedback circuit takes advantage of low power NOR and AND gates realized in transmission gate logic (TGL) to reduce the power consumption. To the best of our knowledge, this technique has never been used in a high frequency prescaler before. Additionally, this work will serve as a comprehensive description of the numerous considerations of prescaler design including explanation of gate-level design and transistor level optimization. Furthermore, digital circuit output is efficiently buffered with CMOS inverters for rail- to-rail operation, maximizing slew rate which minimizes phase noise. The simulated phase noise is -150 dBc/Hz @ 1 MHz and the input bandwidth is 2 GHz (11 GHz and 13 GHz). The power consumption of the entire prescaler is 18.5 mW. All of the above results were obtained from post-layout simulations. Circuit layout has been completed and sent for fabrication.
介绍了一种采用电流模式逻辑(CML) D-Flip - flop、CMOS逆变器和传输门的16/17预分频器,用于1.8 V电源电压下的0.18 mu TSMC工艺。预分频器由一个4/5同步核心和一个反馈回路组成,该反馈回路调制4/5核心以产生16/17的分频比。该反馈电路不采用功耗高的CML,而是利用传输门逻辑(TGL)实现的低功耗NOR和and门来降低功耗。据我们所知,这种技术以前从未在高频预分频器中使用过。此外,这项工作将作为预分频器设计的众多考虑因素的全面描述,包括门级设计和晶体管级优化的解释。此外,数字电路输出有效地缓冲了CMOS逆变器的轨对轨操作,最大限度地提高了转换率,最大限度地减少了相位噪声。仿真相位噪声为- 150dbc /Hz @ 1mhz,输入带宽为2ghz (1ghz和13ghz)。整个预压机的功耗为18.5 mW。以上结果均通过布局后仿真得到。电路布置图已经完成并送去制作。
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引用次数: 5
Sinusoidal RF DACs for undersampled LC bandpass ∑Δ modulabrs 欠采样LC带通∑Δ模量的正弦RF dac
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488822
N. Beilleau, C. Ouffoue, H. Aboushady
In this paper, we present a systematic technique to design bandpass LC Sigma Delta modulators with sinusoidal feedback DACs. The output resistance of the DAC degrades the quality factor of the LC resonator and the DAC output capacitance modifies its resonance frequency. It is shown that the DAC output resistance should be taken into account while designing the Q enhancement circuit of the integrated LC resonator. The resonance frequency is adjusted by modifiying the parallel capacitor of the LC resonator. Using the proposed method, different sinusoidal 3.256 GHz DACs are designed in a CMOS 0.13 mum process. Simulation results are presented to compare their performances in the context of an undersampled LC SigmaDelta modulator.
在本文中,我们提出了一种系统的技术来设计带通LC σ δ调制器与正弦反馈dac。DAC的输出电阻降低了LC谐振器的品质因数,DAC的输出电容改变了LC谐振器的谐振频率。结果表明,在设计集成LC谐振器的Q增强电路时,应考虑DAC的输出电阻。通过修改LC谐振器的并联电容来调节谐振频率。利用该方法,在CMOS 0.13 μ m工艺下设计了不同的3.256 GHz正弦dac。在欠采样LC SigmaDelta调制器环境下,给出了仿真结果来比较它们的性能。
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引用次数: 5
uSOL: A programming language for sensor networks 用于传感器网络的编程语言
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488690
Ramesh Bharadwaj, A. Biswas, J. James, S. Mukhopadhyay
We present an event-driven synchronous programming environment for coordinating and reorganizing sensor networks. More precisely, we present a synchronous programming language uSOL (secure operations language with uncertainty) that has capabilities of handling service invocations asynchronously, provides strong typing to ensure enforcement of information flow and security policies, has constructs for handling uncertainty, and has the ability to deal with failures (both benign and byzantine) of network components.
我们提出了一个事件驱动的同步编程环境,用于协调和重组传感器网络。更准确地说,我们提出了一种同步编程语言uSOL(具有不确定性的安全操作语言),它具有异步处理服务调用的能力,提供强类型以确保信息流和安全策略的实施,具有处理不确定性的构造,并具有处理网络组件故障(良性和拜占庭式)的能力。
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引用次数: 0
A robust pitch detection algorithm for speech signals in a practical noisy environment 一种在实际噪声环境下对语音信号进行鲁棒基音检测的算法
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488611
C. Shahnaz, W. Zhu, M. Ahmad
In this paper, a robust pitch detection algorithm is proposed for speech signals severely corrupted by a non-stationary noise. Using low-frequency band of noisy speech, an effective noise reduction approach is first formulated for power spectral subtraction to track the time-variation of the non-stationary noise prior to pitch detection. Then, a new normalized circular difference function of the enhanced speech, which almost conquers the constraint of overlapping between the first formant and the pitch, is proposed. Simulation results using the Keele reference database demonstrate a better efficacy of the proposed algorithm relative to some of the existing methods in a practical multi-talker babble noise environment.
本文针对被非平稳噪声严重干扰的语音信号,提出了一种鲁棒的基音检测算法。首先利用低频带噪声语音,提出了一种有效的功率谱减噪方法,在基音检测之前跟踪非平稳噪声的时变。在此基础上,提出了一种新的归一化圆形差分函数,该函数几乎克服了第一共振峰与音高重叠的限制。基于Keele参考数据库的仿真结果表明,在实际的多话音噪声环境下,该算法比现有的一些方法具有更好的效果。
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引用次数: 1
A low power IC to enable optical communications in a robotic swarm 一种低功耗集成电路,可在机器人群中实现光通信
Pub Date : 2007-08-01 DOI: 10.1109/MWSCAS.2007.4488702
O. Alonso, R. Casanova, A. Sanuy, A. Arbat, J. Canals, Á. Diéguez, J. Samitier
In this paper a low power transceiver for short-range IR-communications between robots is described. The mm3- sized robots will be deployed in an arena of A4 sheet size with controlled illumination conditions. The transceiver can manage variations of background light from point to point in the arena, interferences induced by other robots and deals with the inter-robot distance, i.e., the amplitude of the signal to be detected.
本文介绍了一种用于机器人间近距离红外通信的低功率收发器。这些3毫米大小的机器人将被部署在A4纸大小的舞台上,并控制照明条件。收发器可以处理场地中点到点的背景光变化、其他机器人引起的干扰,并处理机器人之间的距离,即待检测信号的幅度。
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引用次数: 1
期刊
2007 50th Midwest Symposium on Circuits and Systems
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