Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)最新文献

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Hazard-free synthesis and decomposition of asynchronous circuits 异步电路的无害化合成与分解
Ren-Der Chen, J. Jou, Yeu-Horng Shiau
{"title":"Hazard-free synthesis and decomposition of asynchronous circuits","authors":"Ren-Der Chen, J. Jou, Yeu-Horng Shiau","doi":"10.1109/ASPDAC.1999.759991","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.759991","url":null,"abstract":"In this paper, we solve the problems of hazard-free synthesis and decomposition of asynchronous speed-independent circuits for technology mapping. All high fanin gates are decomposed into gates that can be implemented by the gate library. We first analyze the conditions where hazards may occur during decomposition and then give corresponding strategies to solve them. All the proposed algorithms have been implemented and applied to the asynchronous benchmarks to verify their correctness. Experimental results show that less area is required in our final implementations.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124619866","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
Technology mapping for low power 低功耗技术映射
C. Yeh, C. Chang, Jinn-Shyan Wang
{"title":"Technology mapping for low power","authors":"C. Yeh, C. Chang, Jinn-Shyan Wang","doi":"10.1109/ASPDAC.1999.759981","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.759981","url":null,"abstract":"Power consumption has become a great concern for IC and system designs. As a consequence, power-driven technology mapping has attracted several research attentions. However, the power model they used cannot properly capture the power dissipation when the output of a gate does not switch. In this paper, we propose a pattern oriented power modeling for improved technology mapping. We first perform a profitability study using the complete pattern to pattern transition data organized in tabular form. Then, we propose a probability-based, pattern oriented technology mapping method. Empirical results on benchmark circuits demonstrate the proposed method delivered an average of 13% power reduction compared to the traditional mapping method.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126956158","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: 6
A new technique to exploit frequency domain latency in harmonic balance simulators 一种利用谐波平衡模拟器频域延迟的新技术
M. Gourary, S. Rusakov, S. Ulyanov, M. Zharov, K. Gullapalli, B. Mulvaney
{"title":"A new technique to exploit frequency domain latency in harmonic balance simulators","authors":"M. Gourary, S. Rusakov, S. Ulyanov, M. Zharov, K. Gullapalli, B. Mulvaney","doi":"10.1109/ASPDAC.1999.759711","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.759711","url":null,"abstract":"A technique to accelerate harmonic balance (HB) analysis by taking into account frequency domain latency is presented. The algorithm automatically determines the individual number of harmonics for different nodes. The algorithm is based on Krylov subspace iterative techniques and provides selective estimation of residual norm under reducing dimension.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121114274","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: 3
An efficient approach to constrained via minimization for two-layer VLSI routing 一种有效的两层VLSI路由约束最小化方法
Maolin Tang, K. Eshraghian, H. Cheung
{"title":"An efficient approach to constrained via minimization for two-layer VLSI routing","authors":"Maolin Tang, K. Eshraghian, H. Cheung","doi":"10.1109/ASPDAC.1999.759982","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.759982","url":null,"abstract":"Constrained via minimization is the problem of reassigning wire segments of a VLSI routing so that the number of vias is minimized. In this paper, a new approach is proposed for two-layer VLSI routing. This approach is able to handle any types of routing, and allows arbitrary number of wire segments split at a via candidate.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127040986","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: 18
Embedded tutorial: hardware/software codesign 嵌入式教程:硬件/软件协同设计
M. Imai
{"title":"Embedded tutorial: hardware/software codesign","authors":"M. Imai","doi":"10.1109/ASPDAC.1999.760042","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.760042","url":null,"abstract":"Due to the advance of VLSI technology, it is now possible to fabricate very complicated systems on a chip, which includes CPUs, peripheral circuits, and on-chip memories. These kinds of chips are very effective to implement various electronic systems such as for multimedia processing, communication, and real-time control. However there is a serious problem, called \"design productivity crisis\", to be overcome in the near future. Hardware/Software Codesign (\"codesign\" in short) is a most promising design methodology to achieve much higher design productivity compared to conventional methods. This embedded tutorial introduces current status and future trends of the codesign methodology. In the presentation, trends of VLSI technology and the background behind the design productivity crisis are analyzed. Then, an \"ideal codesign environment\" is proposed, and the fundamental technologies to realize such an ideal codesign environment are categorized. Next, some of the codesign systems developed so far are introduced along with the case studies. Finally, future issues to realize the ideal codesign system are discussed.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127344160","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
Generation of interpretive and compiled instruction set simulators 生成解释和编译指令集模拟器
R. Leupers, Johann Elste, Birger Landwehr
{"title":"Generation of interpretive and compiled instruction set simulators","authors":"R. Leupers, Johann Elste, Birger Landwehr","doi":"10.1109/ASPDAC.1999.760028","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.760028","url":null,"abstract":"Due to the large variety of different embedded processor types, retargetable software development tools, such as compilers and simulators, have received attention recently. Retargetability allows one to handle different target processors with a single tool. In this paper, we present a system for automatic generation of instruction set simulators for a class of embedded processors. Retargetability is achieved by automatic generation of simulators from processor descriptions, given as behavioral or RT-level HDL models. The presented system is capable of bit-true simulation for arbitrary processor word lengths, and it generates both interpretive or compiled simulators. Experimental results for different processors indicate comparatively high simulation speed.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131044983","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: 56
Relaxed simulated tempering for VLSI floorplan designs VLSI平面设计的轻松模拟回火
J. Cong, T. Kong, D. Xu, F. Liang, Jun S. Liu, W. Wong
{"title":"Relaxed simulated tempering for VLSI floorplan designs","authors":"J. Cong, T. Kong, D. Xu, F. Liang, Jun S. Liu, W. Wong","doi":"10.1109/ASPDAC.1999.759698","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.759698","url":null,"abstract":"In the past two decades, the simulated annealing technique has been considered as a powerful approach to handle many NP-hard optimization problems in VLSI designs. Recently, a new Monte Carlo and optimization technique, named simulated tempering, was invented and has been successfully applied to many scientific problems, from random field Ising modeling to the traveling salesman problem. It is designed to overcome the drawback in simulated annealing when the problem has a rough energy landscape with many local minima separated by high energy barriers. In this paper, we have successfully applied a version of relaxed simulated tempering to slicing floorplan design with consideration of both area and wirelength optimization. Good experimental results were obtained.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128321632","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: 17
A US/Japan comparison of design/EDA capabilities 美国/日本设计/EDA能力的比较
H. Mayumi
{"title":"A US/Japan comparison of design/EDA capabilities","authors":"H. Mayumi","doi":"10.1109/ASPDAC.1999.760040","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.760040","url":null,"abstract":"The time is nearing when every ordinary engineer can design his favorite functions into LSI; however it may require drastic reformations in design technology and in social infrastructure. In this survey we evaluate and analyze Japanese design capability relative to the USA's, proposing possible suggestions to prepare for such reformations. Complexity of LSI is measured by an adequately normalized transistor count (NTC), then 'design productivity' is defined as NTC per person-week. Seven factors influencing design capability are selected: team, management, EDA, reuse, business, specification and implementation. 21 ASSP design teams (11 Japanese, 10 US) were chosen and interviewed based on a detailed questionnaire on these metrics/factors, and the acquired data compared by US/Japan averages. NTC ranges around from 100 K to 2 M, averaging at 700 K in both countries. Japanese (J) 'productivity' is a bit higher while its 'production rate (NTC per week)' is lower (losing TTM) than USA's. Factor analysis indicates (all the figures are normalized by NTC): J team size is half of US's; J spends bigger money on EDA and longer time in simulation, but shorter time in verification; J consumes 2.5 times more respins; J loses much more TTM, in more than half the cases due to manager-controllable factors such as design bug, design spec, change, and process tech change. Derived suggestions for Japan are: double the number of engineers per team; reexamine design management in order to reduce fatal bugs and respins; improve EDA quality and reuse quantity; examine and solve perception gaps between managers and engineers about their targets like high quality, reuse, and TTM.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131623751","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
A high speed and low power phase-frequency detector and charge-pump 一种高速低功率相频检测器和电荷泵
W. Lee, Jun-Dong Cho, S. Lee
{"title":"A high speed and low power phase-frequency detector and charge-pump","authors":"W. Lee, Jun-Dong Cho, S. Lee","doi":"10.1109/ASPDAC.1999.760011","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.760011","url":null,"abstract":"In this paper, we introduce a high-speed and low power Phase-Frequency Detector (PFD) that is designed using modified TSPC (True Single-Phase Clock) positive edge triggered D flip-flop. This PFD has a simpler structure with using only 19 transistors. The operation range of this PFD is over 1.2 GHz without additional prescaler circuits. Furthermore, the PFD has a dead zone less than 0.01 ns in the phase characteristics and has low phase sensitivity errors. The phase and frequency error detection range is not limited as in the case of the pt-type and nc-type PFDs. Also, the PFD is independent from the duty cycle of input signals. A new charge-pump circuit is presented that is designed using a charge-amplifier. A stand-by current enhances the speed of charge-pump and removes the charge-sharing which causes a phase noise in the charge-pump PLL. Also, the effects of clock feed-through are reduced by separating the output stage from UP and down signal. The simulation results base on a third-order PLL are presented to verify the lock-in process with the proposed PFD and charge-pump circuits. The PFD and charge-pump circuits are designed using 0.8 /spl mu/m CMOS technology with 5 V supply voltage.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132934492","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: 94
Design re-use: where is the productivity going to come from? 设计重用:生产力从何而来?
J. Ahuja
{"title":"Design re-use: where is the productivity going to come from?","authors":"J. Ahuja","doi":"10.1109/ASPDAC.1999.760048","DOIUrl":"https://doi.org/10.1109/ASPDAC.1999.760048","url":null,"abstract":"Semiconductor process geometries are shrinking and the available silicon capacity is growing at an amazing pace. Consumerization and convergence applications are causing tremendous time to market pressures, resulting in increased product complexity and reduced design cycle times. The gap between what can be built (silicon capacity) and what can be designed is widening. This 'design productivity gap' is causing an industry-wide shift to system-on-a-chip (SOC) design methodology. The corner-stone for success of the SOC methodology is design re-use. The methodology for design re-use will evolve going forward. Huge investments will be made to setup infrastructure and methodologies for creation of re-usable designs and their integration into future products. But, will they deliver the expected productivity gains? This talk presents a progression of re-use methodology alternatives and the key characteristics and productivity impact of each approach.","PeriodicalId":201352,"journal":{"name":"Proceedings of the ASP-DAC '99 Asia and South Pacific Design Automation Conference 1999 (Cat. No.99EX198)","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124136024","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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