ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)最新文献

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Fast adaptive DC-DC conversion using dual-loop one-cycle control in standard digital CMOS process 采用双环单周期控制的标准数字CMOS工艺快速自适应DC-DC转换
D. Ma, W. Ki, C. Tsui
{"title":"Fast adaptive DC-DC conversion using dual-loop one-cycle control in standard digital CMOS process","authors":"D. Ma, W. Ki, C. Tsui","doi":"10.1109/ASPDAC.2004.1337638","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337638","url":null,"abstract":"An adaptive switching convener is presented. It adopts a dual-loop one-cycle control for right line and load regularion, while reruining f a t response and good stabilify. DC level shijiing technique eliminates the use of negative supply voltage and enables both continuous and discontinuous conduction operation. Error correction loops greatly tightens output voltage regulation. mnamic loss control funher improves the eficiency for a wide power range. The conveticr was fabricated wirh a srondard 0 . 5 d~igi ral CMOS process. The ourput voltage cm vary from 0.9V ro 2.W wirh n tracking speed of less than 14pdV for a step change of 1.6V. Maximum efliciency of 93.7% is achieved ond high efliciency above 75% is retained over an output power of l0mW to 45OmW.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126821131","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 place and route aware buffered Steiner tree construction 一个地方和路线感知缓冲斯坦纳树建设
C. Sze, Jiang Hu, C. Alpert
{"title":"A place and route aware buffered Steiner tree construction","authors":"C. Sze, Jiang Hu, C. Alpert","doi":"10.1109/ASPDAC.2004.1337599","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337599","url":null,"abstract":"In order to achieve timing closure on increasingly complex IC designs, buffer insertion needs to be performed on thousands of nets within an integrated physical synthesis system. In most of previous works, buffers may be inserted at any open space. Even when there may appear to be space for buffers in the alleys between large blocks, these regions are often densely packed or may be useful later to fix critical paths. In addition, a buffer solution may inadvertently force wires to go through routing congested regions. Therefore, within physical synthesis, a buffer insertion scheme needs to be aware of both placement congestion and routing congestion of the existing layout and so it has to be able to decide when to insert buffers in dense regions to achieve critical performance improvement and when to utilize the sparser regions of the chip. With the proposed Steiner tree adjustment technique, this work aims at finding congestion-aware buffered Steiner trees. Our tree adjustment technique takes a Steiner tree as input, modifies the tree and simultaneously handles the objectives of timing, placement and routing congestion. To our knowledge, this is the first study, which simultaneously considers these three objectives for the buffered Steiner tree problem. Experimental results confirm the effectiveness of our algorithm while it achieves up to 20x speed-up when comparing with the state-of-the-art algorithm (C.J. Alpert et al., 2003).","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121520044","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 V/sub DD/ and temperature independent CMOS voltage reference circuit 一个V/sub / DD/和温度无关的CMOS电压参考电路
T. Matsuda, R. Minami, A. Kanamori, H. Iwata, T. Ohzone, S. Yamamoto, T. Ihara, S. Nakajima
{"title":"A V/sub DD/ and temperature independent CMOS voltage reference circuit","authors":"T. Matsuda, R. Minami, A. Kanamori, H. Iwata, T. Ohzone, S. Yamamoto, T. Ihara, S. Nakajima","doi":"10.5555/1015090.1015238","DOIUrl":"https://doi.org/10.5555/1015090.1015238","url":null,"abstract":"A pure CMOS threshold voltage reference (V<sub>TR</sub>)circuit achieves temperature(T) coefficient of 5 μV/°C (T=60~+100 °C) and supply voltage(V<sub>DD</sub>) sensitivity of O.1 mV/V (V<sub>DD</sub>=3-5 V). The combination of subthreshold current characteristics and different operating modes in n-MOSFETs provides a small voltage and temperature dependence. A feedback scheme from the reference output to gates of n-MOSFETs not only stabilizes the output but also saves the die area.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"34 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114102745","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: 7
Mixed-clock issue queue design for energy aware, high-performance cores 混合时钟问题队列设计的能源意识,高性能核心
V. Rapaka, Emil Talpes, Diana Marculescu
{"title":"Mixed-clock issue queue design for energy aware, high-performance cores","authors":"V. Rapaka, Emil Talpes, Diana Marculescu","doi":"10.1109/ASPDAC.2004.1337603","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337603","url":null,"abstract":"Globally-asynchronous, locally-synchronous (GALS) design style has started to gain interest recently as a possible solution to the increased design complexity, power and thermal costs, as well as an enabler for allowing fine grain speed and voltage management. Due to its inherent complexity, a possible driver application for such a design style is the case of superscalar, out-of-order processors. We propose a novel mixed-clock issue queue design, and compares and contrasts this new implementation with existing synchronous or mixed-clock versions of issue queues, used in standalone mode or in conjunction with mixed-clock FIFO (first-in, first-out) buffers for inter-domain synchronization. Both transistor level, SPICE simulation, as well as cycle-accurate, microarchitectural analysis, show that cores using mixed-clock issue queues are able to provide better energy-performance operating points when compared to their synchronous or asynchronous FIFO-based counterparts.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115803147","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: 5
Compact 12-port multi-bank register file test-chip in 0.35/spl mu/m CMOS for highly parallel processors 紧凑的12端口多银行寄存器文件测试芯片在0.35/spl μ m CMOS高度并行处理器
T. Sueyoshi, H. Uchida, H.J. Mattausch, T. Koide, Y. Mitani, T. Hironaka
{"title":"Compact 12-port multi-bank register file test-chip in 0.35/spl mu/m CMOS for highly parallel processors","authors":"T. Sueyoshi, H. Uchida, H.J. Mattausch, T. Koide, Y. Mitani, T. Hironaka","doi":"10.1109/ASPDAC.2004.1337644","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337644","url":null,"abstract":"We designed a compact, high-speed, and low-power hank-type 12-port register file test chip for highly-parallel processors in 0.35μm CMOS technology. In this full-custom test chip design, 72% smaller area, 25% shorter access cycle time, and 62% lower power consumption are achieved in comparison to the conventional 12-port-cell-based register file.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121137966","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
Energy efficient code generation exploiting reduced bit-width instruction set architectures (rISA) 利用减小位宽指令集架构(rISA)的节能代码生成
Aviral Shrivastava, N. Dutt
{"title":"Energy efficient code generation exploiting reduced bit-width instruction set architectures (rISA)","authors":"Aviral Shrivastava, N. Dutt","doi":"10.1109/ASPDAC.2004.1337622","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337622","url":null,"abstract":"Energy consumption is emerging as a critical design concern for programmable embedded systems. Many reduced bit-width instruction set architectures (rISA) (e.g., ARM Thumb) are being increasingly used to decrease code size. Previous work has explored energy savings in noncached rISA architectures as a byproduct of code size reduction. We present an energy efficient code generation technique for rISA architectures, and furthermore explore energy savings for both cached and noncached architectures. Our code generation technique uses profile information to find the most frequently executed parts of the program. By aggressively reducing code size on frequently executed parts, fewer fetches to instruction memory are incurred, thus reducing the power consumption of the instruction memory. We achieve an average 30% reduction in instruction memory energy consumption in cached systems, on a variety of benchmarks, as compared to non-rISA architectures.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114262394","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: 11
Development of a waveform sampling front-end ASIC for PET PET波形采样前端专用集成电路的研制
J. Yeom, T. Ishitsu, H. Takahashi
{"title":"Development of a waveform sampling front-end ASIC for PET","authors":"J. Yeom, T. Ishitsu, H. Takahashi","doi":"10.1109/ASPDAC.2004.1337652","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337652","url":null,"abstract":"We present a versatile method for signal processing as an alternative to conventional methods using discrete front-end electronics. A new Waveform Sampling Front-End (WSFE) ASIC for Positron Emission Tomography (PET) has been developed to digitize signals at an early stage. Each channel of the chip consists of a preamplifier, a variable gain amplifier (VGA) and a fast Analog to Digital Converter (ADC) per channel. Two such chips have been designed and experimental results are presented in this paper.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127761195","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
Practical methodology of post-layout gate sizing for 15% more power saving 布置后浇口尺寸的实用方法,可节省15%的电力
N. Miura, Naoki Kato, T. Kuroda
{"title":"Practical methodology of post-layout gate sizing for 15% more power saving","authors":"N. Miura, Naoki Kato, T. Kuroda","doi":"10.1109/ASPDAC.2004.1337614","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337614","url":null,"abstract":"We present a practical methodology of post-layout gate sizing for power reduction. Wire capacitance presumed in logic synthesis typically contains excessive margin for better timing closure in layout design. Power waste due to this can be reduced by post-layout gate sizing based on information obtained by backannotation. Here, we discuss a theory of optimal gate sizing in a signal path with surplus timing. We also, propose a practical design methodology where standard cells are reselected from a cell library by the theory, replaced by engineering change order, and timing constraints are verified by a static timing analyzer. We have applied the methodology to a 700k-gate commercial application processor for 3G cellular phones. Even though the original design was optimized for 133MHz, 170mW operation in a 0.18/spl mu/m CMOS technology, power dissipation was further squeezed by 15% in combinational logic without compromising the performance.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115591615","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
Modeling of coplanar waveguide for buffered clock tree 缓冲时钟树共面波导的建模
Jun Chen, Lei He
{"title":"Modeling of coplanar waveguide for buffered clock tree","authors":"Jun Chen, Lei He","doi":"10.1109/ASPDAC.2004.1337601","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337601","url":null,"abstract":"Owing to inductive effect, coplanar waveguide (CPW) is widely used to achieve signal integrity in high performance clock designs. We first propose a piece-wise linear (PWL) model for the far-end response of a CPW considering ramp input and capacitive loading. The PWL model has a high accuracy but uses at least l000x less time compared to SPICE. We then apply the PWL model to synthesize the CPW geometry for clock trees considering constrains of rising time and oscillation at sinks. We obtain a spectrum of solutions with smooth tradeoff between area and power.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115631752","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
SPICE compatible circuit models for partial reluctance K 部分磁阻K的SPICE兼容电路模型
Hao Ji, Qingjian Yu, W. Dai
{"title":"SPICE compatible circuit models for partial reluctance K","authors":"Hao Ji, Qingjian Yu, W. Dai","doi":"10.1109/ASPDAC.2004.1337701","DOIUrl":"https://doi.org/10.1109/ASPDAC.2004.1337701","url":null,"abstract":"We are the fist to develop SPICE compatible circuit model for partial reluctance K. It can be combined with any partial reluctance based extraction method to perform FiLC simulation directly without the need of inverting partial reluctance matrix back into partial inductance domain or modifying conventional simulator. To build symmetrical partial reluctance matrix, we also prw posed blocked K method based on group concept to cover more magnetic couplings. Both quantitive analysis and experiments demonstrated that the combination of the SPICE compatible circuit model and the blocked K method has the best compromise between accuracy and performance among all SPICE compatible sparsificatioo techniques.","PeriodicalId":426349,"journal":{"name":"ASP-DAC 2004: Asia and South Pacific Design Automation Conference 2004 (IEEE Cat. No.04EX753)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114744170","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: 10
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