检索结果-内蒙古大学图书馆

IEEE Custom Integrated Circuits Conference, CICC 2015

作者： Lin, Jie Zhu, Shikai Yu, Zhiyi Xu, Dongjun Manoj, P. D. Sai Yu, Hao State Key Lab. of ASIC and System Fudan University Shanghai201203 China SYSU-CMU Joint Institute of Engineering Sun Yat-sen University Guangzhou510006 China School of EEE Nanyang Technological University Singapore639798 Singapore

ISBN: (纸本)9781479986828

This paper presents a novel 2.5D multicore processor which consists of 3 distinct silicon dies: a processor die with 8 MIPS-cores, a 16kB SRAM die, and an accelerator die for multimedia and communication applications. These dies are interconnected into multi-modes, like core-core (up to 32 cores), core-memory (4x storage capacity) and core-accelerator (4.4x speedup in H.264 decoder), to establish a scalable and reconfigurable platform with less tape-out die area cost. A pair of 8Gbps SerDes is custom designed for each of the 12 inter-die communication channels, achieving a 2.5D I/O bandwidth of 24GB/s. The processor was implemented in GF 65nm process, and operates at 500MHz under 1.2V supply, with 1.08W power dissipation. © 2015 IEEE.

关键词： Dies

来源：评论

学校读者我要写书评

暂无评论

Anti-lotus leaf effect: smearing millions of picoliter droplets on bio-inspired artificial lotus leaf

Anti-lotus leaf effect: smearing millions of picoliter dropl...

引用

IEEE Conference on Nanotechnology

作者： Lin Du Yongheng Wei Antoine Riaud Jia Zhou ASIC and System State Key Lab School of Microelectronics Fudan University China State Key Laboratory of Genetic Engineering Fudan University China

Compartmentalization of aqueous samples into micro-droplets enables to study single cells or detect single molecules by performing large number of independent experiments. However, as the droplet size becomes smaller, the surface energy becomes larger so that micro-channels or surface treatments are required to break droplets below the picoliter range, resulting in an increased experimental or chemical complexity. Herein, we study the spontaneous liquid film breakup observed after smearing a mother droplet on the surface of lotus leave reversal. As the film breaks and recedes, it is mechanically trapped in single wells formed by the natural bulges on the leaf and forms picoliter droplets, which we called anti-lotus effect droplet. The bio-inspired effect has the advantage of resisting capillary forces and releasing surface tension in the three-phase interface. Using soft-lithography and spin-coating, we obtain the bio-mimetic wells array with the corrugated surface analogous with the lotus leave, which enables a deeper liquid penetration during the smearing step that results in a more efficient filling of the wells. In the present experiments, we have obtained a regular array of 2 pL droplets with a density of 62,500 droplets/cm 2 , which equivalents to 5.4 million droplets on the surface a 96 well plate. This bio-inspired method of forming droplet will be a convenient way to operate with no chemical treatment and seal. It undoubtedly decreases the complexity of chip manufacturing and potential interference by chemical treatments. We believe that such a method contributes to the development of the efficient micro-droplet generator with a pure physical interface and thus is applicable to biological and medical analysis.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bayesian Inference on Introduced General Region: An Efficient Parametric Yield Estimation Method for Integrated Circuits

Bayesian Inference on Introduced General Region: An Efficien...

引用

Asia and South Pacific Design Automation Conference

作者： Zhengqi Gao Zihao Chen Jun Tao Yangfeng Su Dian Zhou Xuan Zeng State Key Lab of ASIC & System School of Microelectronics Fudan University School of Mathematics Fudan University University of Texas at Dallas

ISBN: (数字)9781450379991

ISBN: (纸本)9781728180571

In this paper, we propose an efficient parametric yield estimation method based on Bayesian Inference. By observing that nowadays analog and mixed-signal circuit is designed via a multi-stage flow, and that the circuit performance correlation of early stage and late stage is naturally symmetrical, we introduce a general region to capture the common features of the early and late stage. Meanwhile, two private regions are also incorporated to represent the unique features of these two stages respectively. Afterwards, we introduce classifiers one for each region to explicitly encode the correlation information. Next, we set up a graphical model, and consequently adopt Bayesian Inference to calculate the model parameters. Finally, based on the obtained optimal model parameters, we can accurately and efficiently estimate the parametric yield with a simple sampling method. Our numerical experiments demonstrate that compared to the state-of-the-art algorithms, our proposed method can better estimate the yield while significantly reducing the number of circuit simulations.

关键词： Correlation Graphical models Sampling methods Bayes methods Numerical models Yield estimation Integrated circuit modeling

来源：评论

学校读者我要写书评

暂无评论

Nanofabrication and Optical Property of Submicron Gold Nanopillar Array in both Visible and Near-Infrared Spectra

Nanofabrication and Optical Property of Submicron Gold Nanop...

引用

The 6th International Conference on Nanoscience & Technology, China 2015

作者： Yaqi Ma Jianpeng Liu Sichao Zhang Jinhai Shao Yifang Chen Nanolithogrophy and Application Research Group State Key Lab of ASIC and System School of Information Science and EngineeringFudan University

Local surface plasmonic resonance(LSPR) existing in noble metallic nanostructures, which is caused by the resonant excitation of collective oscillations between the surface free electrons in metallic nanostructures with specific frequency of light, is very important for the development of novel nanoscopic bio/chemosensors. Especially for anistropic nanostructures, such as sub-wavelength gold nano pillars, the high quality factors and sensitivity comparable to conventional surface plasmonic resonance(SPR) sensors should be able to provide us with broad prospects in various applications. According to our previous work [1], in order to improve the sensitivity and quality factors of gold nano pillars as LSPR sensor, ultra-high and well-ordered gold nano pillars with extremely small gaps are in great need. As a matter of fact, our numerical simulations by finite-difference time-domain(FDTD) method suggest that, a 3D LSPR system induced by sub-wavelength gold nano pillars other than traditional 2D system can improve the quality of LSPR sensor by local electromagnetic field enhancement at the top of the pillars as well as the longitude direction. However, neither traditional chemical synthesis nor porous anodized aluminum oxide(AAO) film template method has succeeded in the fabrication of gold nano pillars with high aspect ratio. In our work, we have developed an effective top-down method combined with high resolution electron beam lithography(EBL) and electroplating process for the nanofabrication of sub-wavelength gold pillars with the height up to 2.6 mm and various gaps ranging from 20 nm to 100 nm. The optical measurements suggest a sensitivity up to 128.5 nm/RIU in visible wavelength, and our numerical simulations also predict high sensitivity over 2000 nm/RIU in near-infrared wavelength. Both optical measurements and numerical simulations suggest great potential for ultra-high gold pillars with extremely small gaps as LSPR sensors in visible and near-infrared area.

关键词： local surface plasmonic resonance,electron beam lithography,sub-wavelength,ultra-high,sensors

来源：评论

学校读者我要写书评

暂无评论

Efficient Multiple Starting Point Optimization for Automated Analog Circuit Optimization via Recycling Simulation Data

Efficient Multiple Starting Point Optimization for Automated...

引用

Design, Automation & Test in Europe Conference & Exhibition

作者： Bo Peng Fan Yang Changhao Yan Xuan Zeng Dian Zhou State Key Lab of ASIC & System School of Microelectronics Fudan University Shanghai P. R. China

ISBN: (纸本)9781467392280

Multiple starting point optimization is an efficient approach for automated analog circuit optimization. Starting from a set of starting points, the corresponding local optimums are reached by local optimization method Sequential Quadratic Programming (SQP). The global optimum is then selected from these local optimums. If one starting point is located in a valley, it converges rapidly to the local optimum by the local search. Such a region-hit property makes the multiple starting optimization approach more likely to reach the global optimum. However, the SQP method needs the gradients to drive the optimization. In the traditional method, the gradients are approximated by finite differences. A large number of simulations are needed to obtain the gradients, which becomes the bottleneck of the circuit optimization. We find that for a new point, it is usually surrounded by several neighboring points which have been evaluated in the previous SQP steps. In this paper, we propose an efficient method to calculate the gradient by recycling the previous evaluated points. It is based on the relationship between gradients and the directional derivatives along the directions of the neighbor points. If the neighboring points are not enough for gradient calculation, we will sample adequate neighboring points for gradient calculation. Furthermore, since the performances of the circuits are not sensitive to some design parameters, the gradients are usually sparse. We can thus further employ the idea of sparse recovery to recover the sparse gradients with fewer simulations. Our experimental results demonstrate that with these strategies, the number of simulations can be reduced by up to 63 % without significantly surrendering the accuracy of the optimization results.

关键词： SQP accuracy optimization results

来源：评论

学校读者我要写书评

暂无评论

An Ultra-Low Quiescent Current CMOS Low-Dropout Regulator with Small Output Voltage Variations

An Ultra-Low Quiescent Current CMOS Low-Dropout Regulator wi...

引用

第六届亚太电力与能源国际学术会议

作者： Longjie Du Yizhong Yang Yang Chen Guangjun Xie Xin Cheng School of Electronic Science and Applied Physics Hefei University of Technology State Key Lab of ASIC and SystemFudan University

An ultra-low quiescent current low-dropout regulator with small output voltage variations and improved load regulation is presented in this paper. It makes use of dynamically-biased shunt feedback as the buffer stage and the LDO regulator can be stable for all load conditions. The proposed structure also employs a momentarily current-boosting circuit to reduce the output voltage to the normal value when output is switched from full load to no load. The whole circuit is designed in a 0.18 μm CMOS technology with a quiescent current of 550 nA. The maximum output-voltage variation is less than 20 mV when used with 1 μF external capacitor.

关键词： Ultra-Low Quiescent Current Low-Dropout Regulator Small Output Variations

来源：评论

学校读者我要写书评

暂无评论

Automated Compensation Scheme Design for Operational Amplifier via Bayesian Optimization 21

Automated Compensation Scheme Design for Operational Amplifi...

引用

Proceedings of the 58th Annual ACM/IEEE Design Automation Conference

作者： Jialin Lu Liangbo Lei Fan Yang Changhao Yan Xuan Zeng State Key Lab of ASIC & System School of Microelectronics Fudan University Shanghai P. R. China

ISBN: (纸本)9781665432740

Operational amplifier is a basic component for analog circuit design. The compensation network of an operational amplifier is crucial to improve the stability of the operational amplifier. In this paper, we present an automated compensation scheme design approach for operational amplifiers. We map the behavioral-level description of the operational amplifier to an acyclic graph and transfer the compensation design problem into a topology optimization problem. A feature mapping method is proposed to encode the graph and a bi-level Bayesian optimization approach is proposed to efficiently solve the topology optimization problem. Experimental results show that our proposed method can obtain competitive three-stage operational amplifiers compared to manual designs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Nanofabrication of 100nm radial nanoslits in Au by a novel PMMA/NEB bilayer technique for manipulating vectorial optical field

Nanofabrication of 100nm radial nanoslits in Au by a novel P...

引用

The 6th International Conference on Nanoscience & Technology, China 2015

作者： XiaQi Huang Jinhai Shao Chialin Tsou Sichao Zhang Bingrui Lu Yifang Chen Nanolithography and Application Research Group State key lab of Asic and SystemSchool of Information Science and EngineeringFudan University

Inhomogeneous spatial polarization state of vectorial optical field is of importance in biophotonics, communication, single molecule imaging and optical tweezers etc[1]. It have been reported that the radial sub-wavelength nanoslits can generate vector field due to the surface plasmon polarization effect[2], but fabrication of nanoslits in gold still remains a daunting challenge. To achieve high quality orbital polarization with high extinction, the width of nanoslits should be below wavelength. Conventional fabrication method for such a structure is to employ electron beam lithography(EBL) in negative tone resist with high sensitivity. However, there is always a problem in the lift off process because of the hardness in cured negative tone resists. To overcome this difficulty, a novel EBL process in a bilayer of PMMA/NEB has been developed. The top resist NEB is used to define line-width since the developer for NEB is alkali TMAH, which doesn‘t attack PMMA, NEB lines can be independently replicated on PMMA. A subsequent dry etch in O2 plasma can etched away the PMMA layer using NEB lines as mask, after this step, a deposition of 150-nm thick gold is carried out, followed by a lift off in hot acetone. Radial nanoslits with the width of 100 nm defined by NEB line-width have been successfully fabricated by using this novel process. Optical demonstration of manipulating polarization state by radial slits is under the way. In summary, the brand new concept of EBL combine the merit of positive and negative tone resists, which makes the fabrication of the radial nanoslits become more easily.

关键词： vectorial optical field,radial nanoslits,electron beam lithography,PMMA/NEB bilayer

来源：评论

学校读者我要写书评

暂无评论

A highly efficient reconfigurable rotation unit based on an inverse butterfly network

引用

Frontiers of Information Technology & Electronic Engineering 2017年第11期18卷 1784-1794页

作者： Chao MA Zi-bin DAI Wei LI Hai-juan ZANG Department of Electrical Engineering Zhengzhou Institute of Information Science and Technology Zhengzhou 450004 China State Key Lab of ASIC and System Fudan University Shanghai 200240 China School of Computer Engineering Jiangsu University of Technology Changzhou 213001 China

We propose a reeonfigurable control-bit generation algorithm for rotation and sub-word rotation operations. The algorithm uses a self-routing characteristic to configure an inverse butterfly network. In addition to being highly parallelized and inexpensive, the algorithm integrates the rotation-shift, bi-directional rotation-shift, and sub-word rotation-shift operations. To our best knowledge, this is the first scheme to accommodate a variety of rotation operations into the same architecture. We have developed the highly efficient reconfigurable rotation unit （HERRU） and synthesized it into the Semiconductor Manufacturing International Corporation （SMIC）＇s 65-nm process. The results show that the overall efficiency （relative areaxrelative latency） of our HERRU is higher by at least 23% than that of other designs with similar functions. When executing the bi-directional rotation operations alone, HERRU occupies a significantly smaller area with a lower latency than previously proposed designs.

关键词： Rotation operations Self-routing Control-bit generation algorithm Inverse butterfly network

来源：评论

学校读者我要写书评

暂无评论

Nanofabrication of high aspect ratio optical components for hard X-ray optics

Nanofabrication of high aspect ratio optical components for ...

引用

The 6th International Conference on Nanoscience & Technology, China 2015

作者： Jianpeng Liu Jinhai Shao Xin Li Sichao Zhang Bingrui Lu Yifang Chen Nanolithography and Application Research Group State key lab of Asic and SystemSchool of Information Science and EngineeringFudan University

Full-field transmission X-ray microscopy(TXM) is widely applied in basic study of science, covering microelectronics, bioscience, organic chemistry, materials science, etc [1]. The key components in X-ray optics are condensers providing an illumination onto the testing samples and the high-resolution zone plate as an objective lens forming a magnified image of the sample [2, 3]. So the high aspect ratio(height/width) condensers and zone plates are very important. In this work, we have conducted systematic processing study of high resolution electron beam lithography to fulfill the tasks for high quality X-ray optic components such as lens(condensers and Fresnel zone plates). In the research, the effects of charge distribution on the resist profile control with high aspect ratio configuration have been both theoretically and experimentally investigated. Monte Carlo(MC) simulation by BEAMER-TRACER-lab simulators supplied by Gen ISys Ltd was first applied to calculate the charge distributions in thick PMMA and the resist profiles after development. In the experiment, we designed a condenser based on number of subfield linear gratings with the same area. Guided by theoretical results, fabrication has been successfully carried out for achieving high aspect ratio condensers with 200 nm outermost width and 50 nm outermost width for Fresnel zone plate on in-house made 100 nm thick Si3N4 membranes. By summary, basic study of EBL for achieving resistprofiles with both ultra small feature dimensions and high aspect ratio has been systematically conducted using Monte Carlo algorithm and processing approach. It is expected that the achieved results are applicable not only in the fabrication of X-ray components for high quality imaging and diffraction, but also any other structures where both high resolution and high aspect ratio are demanded.

关键词： Electron beam lithography.High aspect ratio.Hard x-ray optics

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：