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1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)最新文献

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Statistical design of a transconductor using a low voltage CMOS square-law composite cell 采用低电压CMOS平方律复合电池的晶体管统计设计
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759444
T. Tarim, H. Kuntman, M. Ismail
{"title":"Statistical design of a transconductor using a low voltage CMOS square-law composite cell","authors":"T. Tarim, H. Kuntman, M. Ismail","doi":"10.1109/MWSCAS.1998.759444","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759444","url":null,"abstract":"The functional yield is becoming increasingly critical in VLSI design. As feature sizes move into the deep submicron ranges and power supply voltages are reduced, the effect of both device mismatch and inter-die process variations on the performance and reliability of analog integrated circuits is magnified. The statistical MOS (SMOS) model accounts for both inter-die and intra-die variations. A new transconductor, statistically robust with good yield is discussed in this paper. The circuit operates in the saturation region with fully balanced input signals. Initial circuit simulation results are given. Response Surface Methodology and Design of Experiment techniques were used as statistical VLSI design tools combined with the SMOS model. Device size optimization and yield enhancement have been demonstrated.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114626687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Mixed high level and circuital simulation of current-driven loudspeaker systems 电流驱动扬声器系统的混合高电平和电路仿真
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759445
A. Bellini, A. Boni, C. Morandi
{"title":"Mixed high level and circuital simulation of current-driven loudspeaker systems","authors":"A. Bellini, A. Boni, C. Morandi","doi":"10.1109/MWSCAS.1998.759445","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759445","url":null,"abstract":"This paper deals with the high level description and simulation of a power amplifier driving in current-mode a loudspeaker described by a nonlinear macromodel. Simulation results show that the linearity of the overall system including power drive and loudspeaker is increased, by the use of a current amplifier, instead of the most common voltage amplifier. So doing, magnetic field variations with displacement and temperature-dependent impedance can be better characterized and compensated.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116206332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
General methodologies to virtualize FPGAs in Hw/Sw systems 在硬件/软件系统中虚拟化fpga的一般方法
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759442
W. Fornaciari, V. Piuri
{"title":"General methodologies to virtualize FPGAs in Hw/Sw systems","authors":"W. Fornaciari, V. Piuri","doi":"10.1109/MWSCAS.1998.759442","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759442","url":null,"abstract":"The computational needs of an increasing number of applications often require dedicated circuits. Configurable devices, like the Field-Programmable Gate Arrays (FPGAs), are one of the most used solutions to implement such a hardware support. However the size of the circuits that can be mapped on the currently available FPGAs at a medium or low cost is limited with respect to the high demand of several applications in particular when embedded systems and single-chip systems are concerned. This paper introduces some operating-system techniques (namely, partitioning and overlaying) to virtually enlarge the size of the FPGA from the point of view of the applications. The solutions mimic the approaches widely used in the operating systems for virtual memory.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124150704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Improved precision nonlinear PHEMT models 提高非线性PHEMT模型的精度
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759443
D.G. Thomas, G. Branner, B. Huang
{"title":"Improved precision nonlinear PHEMT models","authors":"D.G. Thomas, G. Branner, B. Huang","doi":"10.1109/MWSCAS.1998.759443","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759443","url":null,"abstract":"This paper provides a highly efficient procedure for developing precision \"global\" nonlinear PHEMT models. The process is shown to provide a single set of parameters which produce very good agreement between measured and modeled PHEMT I/sub d/, V/sub ds/, g/sub m/ and g/sub d/ characteristics.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125767058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A new EE curriculum in electric vehicle applications 电动汽车应用的新电子电气课程
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759465
M. Rizkalla, C. Yokomoto, A. Sinha, M. El-Sharkawy, S. Lyshevski, J. Simson
{"title":"A new EE curriculum in electric vehicle applications","authors":"M. Rizkalla, C. Yokomoto, A. Sinha, M. El-Sharkawy, S. Lyshevski, J. Simson","doi":"10.1109/MWSCAS.1998.759465","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759465","url":null,"abstract":"In this paper, we present a curriculum development plan in the Department of Electrical Engineering at the Purdue School of Engineering and Technology at Indianapolis that proposes a major area of emphasis in electric and hybrid electric vehicles. In addition to describing the plan, we present an overview of a feasibility study that is drawn from our recent experiences in teaching a course on the design of electronics for electric vehicles. This course, which was developed under a grant from the Department of Education's Fund for Improvements in Post Secondary Education (FIPSE) program, represents the coordinated efforts of a team of faculty from the Departments of Electrical Engineering and Electrical Engineering Technology. Details of the educational and technical features of the proposed curriculum and the university-industry partnership are described. Student feedback from the trial course is also reported.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121721488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
An algorithm for in-the-loop training based on activation function derivative approximation 一种基于激活函数导数逼近的环内训练算法
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759553
Jinming Yang, M. Ahmadi, G. Jullien, W. Miller
{"title":"An algorithm for in-the-loop training based on activation function derivative approximation","authors":"Jinming Yang, M. Ahmadi, G. Jullien, W. Miller","doi":"10.1109/MWSCAS.1998.759553","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759553","url":null,"abstract":"In this paper, we propose an algorithm for the in-the-loop training of a VLSI implementation of a neural network with analog neurons and programmable digital weights. The difficulty in evaluating the derivative of nonideal activation functions has been the main obstacle to effectively training a VLSI neural network chip via the standard backpropagation (BP) algorithm. In the paper approximated derivatives have been used in BP algorithm incorporating an adaptive learning rate. An analysis from the viewpoint of optimization shows the proposed algorithm is advantageous. Experimental results indicate that the algorithm is superior to weight perturbation-based algorithms.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115887437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Voice and video over ATM based cellular networks 基于蜂窝网络的ATM语音和视频
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759459
Y. Hussein, H. Baraka, A. El Sherbini
{"title":"Voice and video over ATM based cellular networks","authors":"Y. Hussein, H. Baraka, A. El Sherbini","doi":"10.1109/MWSCAS.1998.759459","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759459","url":null,"abstract":"New adaptation layer protocols (AAL-CU) have been proposed to transport multiplexed voice sources over ATM cellular networks. This paper studies the applicability of these proposed AAL-CU protocols to carry multiplexed voice and compressed video traffic. A simulation package has been developed to evaluate the performance of the proposed Ericsson, IBM and TISI protocols. Results indicate that the AAL-CU protocols can be used efficiently to transport integrated voice and video traffic. The high efficiency of AAL-CU as compared to the standard AAL2 results from the concept of minicell multiplexing inside the ATM cell. Results also show that the proposed AAL-CU's have different link utilizations and different error handling capabilities.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115874242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Universal exponential function implementation using highly-linear CMOS V-I converters for dB-linear (AGC) applications 通用指数函数实现使用高线性CMOS V-I转换器的dB-linear (AGC)应用
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759506
Chi-Hung Lin, T. Pimenta, M. Ismail
{"title":"Universal exponential function implementation using highly-linear CMOS V-I converters for dB-linear (AGC) applications","authors":"Chi-Hung Lin, T. Pimenta, M. Ismail","doi":"10.1109/MWSCAS.1998.759506","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759506","url":null,"abstract":"A universal exponential function generator is introduced which is implemented by low-voltage (/spl les/3 V) low-power CMOS widely-linear-input voltage-to-current converters. The Taylor's series expansion is used for the exponential function approach. The proposed exponential circuit is composed of a V-I squarer circuit, a linear V-I converter and a constant current biasing to synthesize the second-order, the first-order and the zero-order terms in Taylor's series. In a 1.2 /spl mu/m n-well CMOS process, at the entire voltage control range, the dB-linear function achieves 20 dB range, the linearity error is less than /spl plusmn/0.5% within 12 dB. The total power consumption is below 0.9 mW with 3V supply voltage.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134020488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
VIEnCoD-proposal of an environment CACSD in the support to the control system development cycle based on VXIbus/LabWindows and MATLAB platform 提出了一种支持基于vxi总线/LabWindows和MATLAB平台的控制系统开发周期的环境CACSD
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759491
E. Loures, M. A. Busetti
{"title":"VIEnCoD-proposal of an environment CACSD in the support to the control system development cycle based on VXIbus/LabWindows and MATLAB platform","authors":"E. Loures, M. A. Busetti","doi":"10.1109/MWSCAS.1998.759491","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759491","url":null,"abstract":"The present paper presents the proposal of an integrated environment CACSD (computer-aided control system design) aimed at the study and design of controllers for several applications, from positioning systems to thermal and chemical processes. Such flexibility is provided by the VXIbus-LabWindows/CVI platform and Matlab tools employed. The integration of these two way resources will be described to give integral support to the whole control system development cycle, from the phase of identification and modelling of the plant to the controller's synthesis. Concluding, a case study is presented.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131703871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Bidirectional block placement in corrupted fixed-length entropy coded video streams 在损坏的定长熵编码视频流中的双向块放置
1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI: 10.1109/MWSCAS.1998.759513
R. Llados-Bentaus, R. Stevenson
{"title":"Bidirectional block placement in corrupted fixed-length entropy coded video streams","authors":"R. Llados-Bentaus, R. Stevenson","doi":"10.1109/MWSCAS.1998.759513","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759513","url":null,"abstract":"Fixed length entropy codes (FLC) have been employed as an alternative to the usual variable length codes (VLC) in video codecs. The effect of a transmission error in an FLC coded stream does not propagate beyond the corrupted codeword because of its fixed parsing structure. This paper presents a new decoding algorithm for FLC compressed video streams that fully exploits the error resilience properties of FLC codes combined with spatial synchronization points. While maintaining the compression efficiency of VLC coded video streams, the proposed solution is a novel idea to combat the consequences of transmission errors and it is totally compatible with more traditional solutions such as error concealment and forward error correcting codes.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131748914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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