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Variability-aware design of double gate FinFET-based current mirrors 基于finfet的双栅电流反射镜的可变感知设计
Pub Date : 2014-05-20 DOI: 10.1145/2591513.2591583
D. Ghai, S. Mohanty, G. Thakral, Oghenekarho Okobiah
With the technology trend moving towards smaller geometries and improved circuit performances, multigate transistors are expected to replace the traditional bulk devices. The double-gate FinFET lends itself to a rich design space using various configurations of the two gates. Accurate current mirroring is a critical analog design requirement in many applications. Current mirror is an essential component in analog design for biasing and constant current generation. This paper presents the exploration of different configurations of a double gate fully depleted SOI based FinFETs for efficient design of current mirror designs. In particular, comparison among the important Figures-of-Merit (FoMs) current mirror designs including mismatch, variability, output resistance ($r_0$), compliance voltage ($V_{CV}$) is presented for: (1) shorted-gate (SG), (2) independent-gate (IG), and (3) low-power (LP) configurations. Based on the results obtained, guidelines are presented for the designer for current mirror design using FinFET.
随着技术趋势向更小的几何形状和提高电路性能,多栅极晶体管有望取代传统的大块器件。双栅极FinFET通过使用两个栅极的各种配置提供了丰富的设计空间。在许多应用中,精确的电流镜像是一个关键的模拟设计要求。电流反射镜是偏置和恒流模拟设计中必不可少的元件。本文介绍了一种基于双栅完全耗尽SOI的finfet的不同配置,用于有效设计电流反射镜设计。特别地,比较了包括失配、可变性、输出电阻($r_0$)、符合电压($V_{CV}$)在内的重要的FoMs电流镜设计:(1)短门(SG)、(2)独立门(IG)和(3)低功耗(LP)配置。在此基础上,提出了利用FinFET进行电流反射镜设计的指导原则。
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引用次数: 4
On-line detection of the deadlocks caused by permanently faulty links in quasi-delay insensitive networks on chip 芯片上准时延不敏感网络中链路永久故障引起的死锁在线检测
Pub Date : 2014-05-20 DOI: 10.1145/2591513.2591518
Wei Song, Guangda Zhang, J. Garside
Asynchronous networks on chip (NoCs) are promising candidates for supporting the enormous communication needed by future many-core systems due to their low-energy and high-speed. Similar to synchronous NoCs, asynchronous NoCs are vulnerable to faults but their fault-tolerance is not studied adequately, especially the quasi-delay insensitive (QDI) NoCs. One of the key issues neglected by most designers is that permanent faults in QDI NoCs cause deadlocks, which cripples the traditional fault-tolerant techniques using redundant codes. A novel detection method has been proposed to locate the faulty link in a QDI NoC according to a common pattern shared by all fault-related deadlocks. It is shown that this method introduces low hardware overhead and reports permanently faulty links with a short delay and guaranteed accuracy.
异步片上网络(noc)由于其低功耗和高速的特性,在支持未来多核系统所需的大量通信方面具有很大的前景。与同步网络网络类似,异步网络网络也容易发生故障,但对其容错性的研究并不充分,尤其是准延迟不敏感网络网络。大多数设计人员忽略的一个关键问题是,QDI noc中的永久故障会导致死锁,这削弱了使用冗余代码的传统容错技术。提出了一种基于故障相关死锁共有模式的QDI NoC故障链路检测方法。结果表明,该方法硬件开销小,报告永久故障链路的时延短,精度有保证。
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引用次数: 7
Generation of reduced analog circuit models using transient simulation traces 利用瞬态仿真走线生成简化的模拟电路模型
Pub Date : 2014-05-20 DOI: 10.1145/2591513.2591530
P. Winkler, Henda Aridhi, M. Zaki, S. Tahar
The generation of fast models for device level circuit descriptions is a very active area of research. Model order reduction is an attractive technique for dynamical models size reduction. In this paper, we propose an approach based on clustering, curve-fitting, linearization and Krylov space projection to build reduced models for nonlinear analog circuits. We demonstrate our model order reduction method for three nonlinear circuits: a voltage controlled oscillator, an operational amplifier and a digital frequency divider. Our experimental results show that the reduced models lead to an improvement in simulation speed while guaranteeing the representation of the behavior of the original circuit design.
器件级电路描述快速模型的生成是一个非常活跃的研究领域。模型阶数约简是一种有吸引力的动态模型尺寸缩减技术。本文提出了一种基于聚类、曲线拟合、线性化和克雷洛夫空间投影的方法来建立非线性模拟电路的简化模型。我们演示了三种非线性电路的模型降阶方法:压控振荡器、运算放大器和数字分频器。我们的实验结果表明,简化后的模型在保证原始电路设计行为的表现的同时,提高了仿真速度。
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引用次数: 1
A dual-rail LUT for reconfigurable logic using null convention logic 用于使用空约定逻辑的可重构逻辑的双轨道LUT
Pub Date : 2014-05-20 DOI: 10.1145/2591513.2591589
Jing Yu, P. Beckett
Both asynchronous and reconfigurable techniques are likely to become increasingly important in the future due to greater device unreliability and variability at nano-scale dimensions. One promising asynchronous technique, Null Convention Logic (NCL) is a symbolically complete quasi-delay insensitive logic system that is inherently self-determined, locally autonomous and self-synchronizing. As current FPGA devices are set up for clocked synchronous logic they are not well suited to reconfigurable asynchronous systems. A reconfigurable block supporting NCL that is intended to form one component of a FPGA organization is proposed and analyzed. Both single-rail and dual-rail LUTs are described. The block design and layout is described and analyzed using an advanced 45nm bulk CMOS fabrication process.
由于在纳米尺度上设备的不可靠性和可变性越来越大,异步和可重构技术在未来可能变得越来越重要。空约定逻辑(Null Convention Logic, NCL)是一种具有自确定、局部自治和自同步特性的符号完备的准延迟不敏感逻辑系统,是一种很有前途的异步技术。由于当前的FPGA设备是为时钟同步逻辑设置的,它们不太适合于可重构的异步系统。提出并分析了一种支持NCL的可重构块,该块旨在构成FPGA组织的一个组件。描述了单轨和双轨lut。采用先进的45nm块体CMOS制造工艺,描述和分析了块设计和布局。
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引用次数: 0
A design flow for physical synthesis of digital cells with ASTRAN 用ASTRAN进行数字细胞物理合成的设计流程
Pub Date : 2014-05-20 DOI: 10.1145/2591513.2591577
A. Ziesemer, R. Reis, Matheus T. Moreira, Michel Evandro Arendt, Ney Laert Vilar Calazans
As the foundries update their advanced processes with new complex design rules and cell libraries grow in size and complexity, the cost of library development become increasingly higher. In this work we present the methodology used in ASTRAN to allow automatic layout generation of cell libraries for technologies down to 45nm from its transistor level netlist description in SPICE format. It supports non-complementary logic cells, allowing generation of any kind of transistor networks, and continuous transistor sizing. We describe our new generation flow which is currently being used to generate a library with more than 500 asynchronous cells in a 65nm process.
随着晶圆代工厂采用新的复杂设计规则更新其先进工艺,单元库的规模和复杂性不断增加,单元库开发的成本越来越高。在这项工作中,我们介绍了ASTRAN中使用的方法,该方法允许从其晶体管级网络表描述中以SPICE格式自动生成低至45nm的技术的单元库。它支持非互补逻辑单元,允许生成任何类型的晶体管网络,以及连续的晶体管尺寸。我们描述了我们的新一代流程,该流程目前用于在65nm工艺中生成具有500多个异步单元的库。
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引用次数: 2
An efficient approach for designing and minimizing reversible programmable logic arrays 一种设计和最小化可逆可编程逻辑阵列的有效方法
Pub Date : 2012-05-03 DOI: 10.1145/2206781.2206834
Sajib Kumar Mitra, Lafifa Jamal, M. Kaneko, H. M. H. Babu
Reversible computing dissipates zero energy in terms of information loss at input and also it can detect error of circuit by keeping unique input-output mapping. In this paper, we have proposed a cost effective design of Reversible Programmable Logic Arrays (RPLAs) which is able to realize multi-output ESOP (Exclusive-OR Sum-Of-Product) functions by using a cost effective 3x3 reversible gate, called MG (MUX Gate). Also a new algorithm has been proposed for the calculation of critical path delay of reversible PLAs. The minimization processes consist of algorithms for ordering of output functions followed by the ordering of products. Five lower bounds on the numbers of gates, garbages and quantum costs of reversible PLAs are also proposed. Finally, we have compared the efficiency of proposed design with the existing one by providing benchmark functions analysis. The experimental results show that the proposed design outperforms the existing one in terms of numbers of gates, garbages, quantum costs and delay.
可逆计算在输入处的信息损失为零,并且可以通过保持输入输出映射的唯一性来检测电路的误差。在本文中,我们提出了一种具有成本效益的可逆可编程逻辑阵列(RPLAs)设计,它能够通过使用具有成本效益的3 × 3可逆门(称为MG (MUX门))实现多输出ESOP(异或积和)功能。此外,本文还提出了一种计算可逆PLAs关键路径延迟的新算法。最小化过程由输出函数排序算法和产品排序算法组成。并提出了可逆pla的门数、垃圾数和量子成本的5个下界。最后,我们通过提供基准函数分析,将所提设计与现有设计的效率进行了比较。实验结果表明,该设计在门数、垃圾、量子成本和延迟方面都优于现有设计。
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引用次数: 10
InMnAs magnetoresistive spin-diode logic InMnAs磁阻自旋二极管逻辑
Pub Date : 2012-05-03 DOI: 10.1145/2206781.2206833
J. Friedman, N. Rangaraju, Y. Ismail, B. Wessels
Electronic computing relies on systematically controlling the flow of electrons to perform logical functions. Various technologies and logic families are used in modern computing, each with its own tradeoffs. In particular, diode logic allows for the execution of logic with many fewer devices than complementary metal-oxide-semiconductor (CMOS) architectures, which implies the potential to be faster, cheaper, and dissipate less power. It has heretofore been impossible to fully utilize diode logic, however, as standard diodes lack the capability of performing signal inversion. Here we create a binary logic family based on high and low current states in which the InMnAs magnetoresistive semiconductor heterojunction diodes implement the first complete logic family based solely on diodes. The diodes are used as switches by manipulating the magnetoresistance with control currents that generate magnetic fields through the junction. With this device structure, we present basis logic elements and complex circuits consisting of as few as 10% of the devices required in their conventional CMOS counterparts. These circuits are evaluated based on InMnAs experimental data, and design techniques are discussed. As Si scaling reaches its inherent limits, this spin-diode logic family is an intriguing potential replacement for CMOS technology due to its material characteristics and compact circuits.
电子计算依靠系统地控制电子流动来执行逻辑功能。现代计算中使用了各种技术和逻辑家族,每种技术和逻辑家族都有自己的权衡。特别是,二极管逻辑允许使用比互补金属氧化物半导体(CMOS)架构更少的器件来执行逻辑,这意味着更快,更便宜,并且消耗更少的功率。然而,由于标准二极管缺乏执行信号反转的能力,到目前为止还不可能充分利用二极管逻辑。在这里,我们创建了一个基于高电流和低电流状态的二进制逻辑族,其中InMnAs磁阻半导体异质结二极管实现了第一个完全基于二极管的完整逻辑族。二极管通过控制电流通过结产生磁场来操纵磁阻,从而用作开关。利用这种器件结构,我们提出了基本逻辑元件和复杂电路,其组成仅为传统CMOS对应器件所需器件的10%。基于InMnAs实验数据对这些电路进行了评估,并讨论了设计技术。当Si缩放达到其固有极限时,由于其材料特性和紧凑的电路,这种自旋二极管逻辑家族是CMOS技术的一个有趣的潜在替代品。
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引用次数: 10
CMOS compatible many-core noc architectures with multi-channel millimeter-wave wireless links 具有多通道毫米波无线链路的CMOS兼容多核noc架构
Pub Date : 2012-05-03 DOI: 10.1145/2206781.2206822
Sujay Deb, Kevin Chang, Miralem Cosic, A. Ganguly, P. Pande, D. Heo, B. Belzer
Traditional many-core designs based on the Network-on-Chip (NoC) paradigm suffer from high latency and power dissipation as the system size scales up due to their inherent multi-hop communication. NoC performance can be significantly enhanced by introducing long-range, low power, and high-bandwidth single-hop wireless links between far apart cores. This paper presents a design methodology and performance evaluation for a hierarchical small-world NoC with CMOS compatible on-chip millimeter (mm)-wave wireless long-range communication links. The proposed wireless NoC offers significantly higher bandwidth and lower energy dissipation compared to its conventional non-hierarchical wired counterpart in presence of both uniform and non-uniform traffic patterns. The performance improvement is achieved through efficient data routing and optimum placement of wireless hubs. Multiple wireless shortcuts operating simultaneously provide an energy efficient solution for design of many-core communication infrastructures.
基于片上网络(NoC)模式的传统多核设计由于其固有的多跳通信,随着系统规模的扩大,存在高延迟和功耗的问题。通过在相距较远的核心之间引入远程、低功耗和高带宽的单跳无线链路,可以显著增强NoC性能。本文提出了一种具有CMOS兼容片上毫米波无线远程通信链路的分层小世界NoC的设计方法和性能评估。在均匀和非均匀的流量模式下,与传统的非分层有线通信相比,所提出的无线NoC提供了显着更高的带宽和更低的能耗。性能改进是通过有效的数据路由和无线集线器的最佳位置来实现的。同时运行的多个无线快捷方式为多核通信基础设施的设计提供了一种节能的解决方案。
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引用次数: 21
A fully integrated switched-capacitor DC-DC converter with dual output for low power application 完全集成的开关电容DC-DC转换器,具有双输出,适用于低功耗应用
Pub Date : 2012-05-03 DOI: 10.1145/2206781.2206803
HeungJun Jeon, Yong-Bin Kim
This paper presents a fully integrated on-chip switched-capacitor (SC) DC-DC converter that supports two regulated power supply voltages of 2.2V and 3.2V from 5V input supply and delivers the maximum load currents up to 8mA at both of the outputs. The entire converter system uses two 2-to-1 converter blocks. The upper output voltage (3.2V) is generated from the 2-to-1_up converter by means of averaging the 5V input and the generated lower output voltage (2.2V), which is generated from 2-to-1_dw converter. Since 2-to-1_up converter is less sensitive to the bottom-plate parasitic capacitance loss, they are implemented with MOS capacitors, which show higher capacitance density (2.7fF/μm2, α=6.5%) than MIM capacitors (1fF/μm2, α=2.5%) while they have bigger bottom-plate parasitic capacitance ratio (α). The proposed implementation saves the area and quiescent currents for the control blocks since each block shares required analog and digital control blocks. The proposed converter is designed using high-voltage 0.35μm BCDMOS technology. Both output voltages are regulated by means of pulse frequency modulation (PFM) technique using 18-bit shift registers and digitally controlled oscillators (DCOs). Over the wide output power ranges from 5.4mW to 43.2mW, the converter achieves the average efficiency of 70.0% and the peak efficiency of 71.4%. 10-phase interleaving technique enables the output voltage ripples of the both outputs less than 1% (<40mV) of the output voltages when 400pF of output buffer capacitors are used for both outputs.
本文介绍了一种完全集成的片上开关电容(SC) DC-DC转换器,该转换器支持2.2V和3.2V两个稳压电源电压,从5V输入电源,并在两个输出端提供最大负载电流高达8mA。整个转换器系统使用两个2对1转换器模块。上输出电压(3.2V)由2-to-1_up变换器通过平均5V输入和2-to-1_dw变换器产生的下输出电压(2.2V)而产生。由于2-to- 1up变换器对底板寄生电容损耗的敏感性较低,采用MOS电容实现,其电容密度(2.7fF/μm2, α=6.5%)高于MIM电容(1fF/μm2, α=2.5%),同时具有较大的底板寄生电容比(α)。所提出的实现节省了控制块的面积和静态电流,因为每个块共享所需的模拟和数字控制块。该转换器采用高压0.35μm BCDMOS技术设计。两个输出电压通过脉冲频率调制(PFM)技术调节,采用18位移位寄存器和数字控制振荡器(dco)。在5.4 ~ 43.2mW的宽输出功率范围内,变换器的平均效率为70.0%,峰值效率为71.4%。10相交错技术使两个输出均使用400pF的输出缓冲电容时,两个输出的输出电压纹波小于输出电压的1% (<40mV)。
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引用次数: 10
NBTI mitigation in microprocessor designs 微处理器设计中的NBTI缓解
Pub Date : 2012-05-03 DOI: 10.1145/2206781.2206791
S. Corbetta, W. Fornaciari
Negative-Bias Temperature Instability seriously affects nanoscale circuits reliability and performance. Continuous stress and increasing operating temperatures lead to device degradation and long-term system unavailability. The opportunity to optimize the duty-cycle of the stress/recovery phases to reduce Vth degradation leads to innovative research of reliability-oriented resources allocation at architectural level. This work explores the impact of different allocation strategies on the processor degradation, through a novel estimation methodology. Experimental results show that the proposed NBTI-aware allocation strategy can guarantee from 10% and up to 30% lower degradation compared to classical strategies, under different operating scenarios and under process variability.
负偏置温度不稳定性严重影响纳米电路的可靠性和性能。持续的应力和不断升高的工作温度会导致设备退化和系统长期不可用。优化压力/恢复阶段的工作周期以减少Vth退化的机会导致了在架构级别上以可靠性为导向的资源分配的创新研究。这项工作探讨了不同的分配策略对处理器退化的影响,通过一种新的估计方法。实验结果表明,在不同的操作场景和过程可变性下,所提出的nbti感知分配策略可以保证比经典策略降低10%到30%的退化。
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引用次数: 12
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ACM Great Lakes Symposium on VLSI
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