Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611472
Ruijing Shen, Xiangqing He, Liu Yang
For a successful analog/mixed signal design, various layout constraints have to be seriously addressed, which is one of the reasons why automatic design of analog layouts is intrinsically more difficult than that of digital layouts. Since feedback has long been a mysterious effect in virtually all analog integrated circuits, improving on constraint file can be done according to feedback information. In this paper, the technique of feedback circuit extraction (FCE) is presented, which is the transformation of feedback design descriptions from circuit level to functional level. Novelly, the algorithm of FCE utilizes the direction of signal flow to extract detailed information of intentional feedback network
{"title":"Extraction of feedback information from circuit netlists","authors":"Ruijing Shen, Xiangqing He, Liu Yang","doi":"10.1109/ICASIC.2005.1611472","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611472","url":null,"abstract":"For a successful analog/mixed signal design, various layout constraints have to be seriously addressed, which is one of the reasons why automatic design of analog layouts is intrinsically more difficult than that of digital layouts. Since feedback has long been a mysterious effect in virtually all analog integrated circuits, improving on constraint file can be done according to feedback information. In this paper, the technique of feedback circuit extraction (FCE) is presented, which is the transformation of feedback design descriptions from circuit level to functional level. Novelly, the algorithm of FCE utilizes the direction of signal flow to extract detailed information of intentional feedback network","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128068614","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611307
Xu Ma, Jian Gao, Jing Chen
This paper presents a high-performance low-power 2D IDCT processor for video applications. Based on multiply-accumulator architecture, the processor can meet the high-speed requirement of HDTV. To save power consumption, the processor employs asynchronous pipeline in which local clocks are enabled only when there is an operation to perform. Compared with conventional synchronous pipelined design, the proposed design exhibits an average power saving of 40%.
{"title":"A high-performance low-power 2D 8/spl times/8 IDCT processor with asynchronous pipeline","authors":"Xu Ma, Jian Gao, Jing Chen","doi":"10.1109/ICASIC.2005.1611307","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611307","url":null,"abstract":"This paper presents a high-performance low-power 2D IDCT processor for video applications. Based on multiply-accumulator architecture, the processor can meet the high-speed requirement of HDTV. To save power consumption, the processor employs asynchronous pipeline in which local clocks are enabled only when there is an operation to perform. Compared with conventional synchronous pipelined design, the proposed design exhibits an average power saving of 40%.","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133316994","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611252
Z. Qi, Hang Li, S.X.-D. Tan, Yici Cai, Xianlong Hong
Excessive power supply noise increases propagation delay of switching gates and reduces noise margin of the circuit. Adding on-chip decoupling capacitors (decaps) is an effective way to reduce voltage noise in a on-chip power delivery system. In this paper, we propose an efficient and novel algorithm to allocate decaps in an area efficient way. The new algorithm applies the sequence of linear programming based approach to searching the minimum decap area to reduce voltage drop below user specified threshold. We show existing sensitivity based decap allocation algorithms tend to over estimate the decap areas due to nonlinear sensitivity dependence on decap values. Experimental results show that the proposed algorithm uses significantly less decap area than the existing conjugate gradient based approach but with similar CPU runtimes
{"title":"On-chip decoupling capacitor budgeting by sequence of linear programming","authors":"Z. Qi, Hang Li, S.X.-D. Tan, Yici Cai, Xianlong Hong","doi":"10.1109/ICASIC.2005.1611252","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611252","url":null,"abstract":"Excessive power supply noise increases propagation delay of switching gates and reduces noise margin of the circuit. Adding on-chip decoupling capacitors (decaps) is an effective way to reduce voltage noise in a on-chip power delivery system. In this paper, we propose an efficient and novel algorithm to allocate decaps in an area efficient way. The new algorithm applies the sequence of linear programming based approach to searching the minimum decap area to reduce voltage drop below user specified threshold. We show existing sensitivity based decap allocation algorithms tend to over estimate the decap areas due to nonlinear sensitivity dependence on decap values. Experimental results show that the proposed algorithm uses significantly less decap area than the existing conjugate gradient based approach but with similar CPU runtimes","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131990246","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611359
Mao Jingwen, Chen Tingqian, Chen Cheng, R. Junyan, Yang Li
A low power and high precision CMOS bandgap voltage reference circuit is presented. Prototype of the circuit is fabricated using the 0.18 mum CMOS process. The power supply is only 1.5 V. It fulfills the first order PTAT (proportion to absolute temperature) temperature curvature compensation with a good PSRR (power supply rejection ratio). The measured results of this circuit show that the PSRR is 47 dB. The output voltage varies from 1.114 V to 1.117 V which is constant within 0.269% over the temperature range of 0~80 degC. The power dissipation is 0.22 mW at 1.5 V and the active area is 0.057 mm2
{"title":"CMOS 1.5V bandgap voltage reference","authors":"Mao Jingwen, Chen Tingqian, Chen Cheng, R. Junyan, Yang Li","doi":"10.1109/ICASIC.2005.1611359","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611359","url":null,"abstract":"A low power and high precision CMOS bandgap voltage reference circuit is presented. Prototype of the circuit is fabricated using the 0.18 mum CMOS process. The power supply is only 1.5 V. It fulfills the first order PTAT (proportion to absolute temperature) temperature curvature compensation with a good PSRR (power supply rejection ratio). The measured results of this circuit show that the PSRR is 47 dB. The output voltage varies from 1.114 V to 1.117 V which is constant within 0.269% over the temperature range of 0~80 degC. The power dissipation is 0.22 mW at 1.5 V and the active area is 0.057 mm2","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130339789","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611477
G. Suzuki
The Elmore base delay calculation method has long been in use, but this method cannot meet accuracy demands of current designs using deep sub-micron processes. On the other hand, SPICE can provide high accuracy, but it is very time consuming. Therefore, a novel, highly accurate and high-speed delay analysis method is proposed: MOR (model order reduction). We applied it in interconnect signal analysis to evaluate its performance
{"title":"VLSI interconnect signal analysis using a projection framework method","authors":"G. Suzuki","doi":"10.1109/ICASIC.2005.1611477","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611477","url":null,"abstract":"The Elmore base delay calculation method has long been in use, but this method cannot meet accuracy demands of current designs using deep sub-micron processes. On the other hand, SPICE can provide high accuracy, but it is very time consuming. Therefore, a novel, highly accurate and high-speed delay analysis method is proposed: MOR (model order reduction). We applied it in interconnect signal analysis to evaluate its performance","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115334639","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611392
Lai Xin-quan, Yu Weixue, Ligang, Cao Yu
Based on the power-up/power-down control, the paper describes a low quiescent current and reset time adjustable power-on reset (POR) circuit, which is integrated in a regulator. Compared with the conventional RC reset circuit, it can provide more accurate reset pulse at slow power up and twinkling power down. And when the chip works properly, parts of the power-on reset circuit are shut down, then the quiescent current of the POR is reduced by 12muA. In addition, the power-on reset time can be adjusted based on different applications
{"title":"A low quiescent current and reset time adjustable power-on reset circuit","authors":"Lai Xin-quan, Yu Weixue, Ligang, Cao Yu","doi":"10.1109/ICASIC.2005.1611392","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611392","url":null,"abstract":"Based on the power-up/power-down control, the paper describes a low quiescent current and reset time adjustable power-on reset (POR) circuit, which is integrated in a regulator. Compared with the conventional RC reset circuit, it can provide more accurate reset pulse at slow power up and twinkling power down. And when the chip works properly, parts of the power-on reset circuit are shut down, then the quiescent current of the POR is reduced by 12muA. In addition, the power-on reset time can be adjusted based on different applications","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115919065","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611325
A. Wang, X. Guan, H. Feng, Q. Wu, R. Zhan, Liwu Yang
This paper presents a 2.4 GHz fully integrated class-A power amplifier designed and implemented in a commercial 0.35 mum SiGe BiCMOS technology for a single-chip dual-band transceiver. It delivers a power output of 18.5dBm at an input power of -8dBm with a PAE of 17%. The 2nd and 3rd harmonics are -37.5dBc and -32.2dBc, respectively. The power amplifier draws a DC current of 126mA from a 3.3 V supply and achieves a linear gain of 27.6 dB. The fabricated die size is only 1.2 mm times 1 mm. An improved PA model is introduced for optimal power matching analysis that was verified in this design
本文介绍了一种2.4 GHz全集成a类功率放大器的设计和实现，该放大器采用商用0.35 μ g BiCMOS技术，用于单片双频收发器。在输入功率为-8dBm时，输出功率为18.5dBm, PAE为17%。第二次和第三次谐波分别为-37.5dBc和-32.2dBc。功率放大器从3.3 V电源输出126mA的直流电流，实现27.6 dB的线性增益。制作的模具尺寸仅为1.2 mm乘以1mm。提出了一种改进的PA模型，用于最优功率匹配分析，并在设计中进行了验证
{"title":"A 2.4 GHz Fully Integrated Class-A Power Ampifier In 0.35μm SiGe BiCMOS Technology","authors":"A. Wang, X. Guan, H. Feng, Q. Wu, R. Zhan, Liwu Yang","doi":"10.1109/ICASIC.2005.1611325","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611325","url":null,"abstract":"This paper presents a 2.4 GHz fully integrated class-A power amplifier designed and implemented in a commercial 0.35 mum SiGe BiCMOS technology for a single-chip dual-band transceiver. It delivers a power output of 18.5dBm at an input power of -8dBm with a PAE of 17%. The 2nd and 3rd harmonics are -37.5dBc and -32.2dBc, respectively. The power amplifier draws a DC current of 126mA from a 3.3 V supply and achieves a linear gain of 27.6 dB. The fabricated die size is only 1.2 mm times 1 mm. An improved PA model is introduced for optimal power matching analysis that was verified in this design","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114021764","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611255
Jianming Wu, Ke Liu, Bo Shen, Hao Min
This paper presents a hardware efficient FFT implementation architecture using a novel data access scheme for OFDM applications. By conversion of digit-reversed to bit-reversed order addressing, continuous flow FFT processing can be achieved using 2 N-word memories by alternation between natural order and bit-reversed order addressing. An in-place multi-bank memory is adopted to accommodate high-speed applications such as wireless multimedia communications. Also the bank index generation is performed using bit-wise XOR operations instead of conventional modulo-r additions. The scheme supports scalable length FFT computation and achieves conflict-free memory access
{"title":"A hardware efficient VLSI architecture for FFT processor in OFDM systems","authors":"Jianming Wu, Ke Liu, Bo Shen, Hao Min","doi":"10.1109/ICASIC.2005.1611255","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611255","url":null,"abstract":"This paper presents a hardware efficient FFT implementation architecture using a novel data access scheme for OFDM applications. By conversion of digit-reversed to bit-reversed order addressing, continuous flow FFT processing can be achieved using 2 N-word memories by alternation between natural order and bit-reversed order addressing. An in-place multi-bank memory is adopted to accommodate high-speed applications such as wireless multimedia communications. Also the bank index generation is performed using bit-wise XOR operations instead of conventional modulo-r additions. The scheme supports scalable length FFT computation and achieves conflict-free memory access","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114366308","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611489
Junhao Shi Gorschwin, Fey Rolf Drechsler, Andreas Glowatz, Juirgen Schloffel, F. Hapke
Due to the ever increasing size of integrated circuits classical methods for automatic test pattern generation (ATPG) reach their limits. On the other hand recent advances in algorithms to solve the Boolean satisfiability (SAT) problem allow the application to large instances. This suggests to exploit modern SAT techniques for ATPG. Here, we present a SAT-based ATPG tool that is applicable to large industrial circuits. The performances of different SAT-solvers are experimentally evaluated and the potential for problem specific heuristics is shown. Further experiments show that most of the faults can be classified very efficiently independently of the circuit size
{"title":"Experimental studies on SAT-based test pattern generation for industrial circuits","authors":"Junhao Shi Gorschwin, Fey Rolf Drechsler, Andreas Glowatz, Juirgen Schloffel, F. Hapke","doi":"10.1109/ICASIC.2005.1611489","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611489","url":null,"abstract":"Due to the ever increasing size of integrated circuits classical methods for automatic test pattern generation (ATPG) reach their limits. On the other hand recent advances in algorithms to solve the Boolean satisfiability (SAT) problem allow the application to large instances. This suggests to exploit modern SAT techniques for ATPG. Here, we present a SAT-based ATPG tool that is applicable to large industrial circuits. The performances of different SAT-solvers are experimentally evaluated and the potential for problem specific heuristics is shown. Further experiments show that most of the faults can be classified very efficiently independently of the circuit size","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116138081","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}
Pub Date : 2005-10-24DOI: 10.1109/ICASIC.2005.1611327
Qin Song, Wu Xiaobo, Yan Xiaolang
A novel minimum-voltage active-clamping (MVAC) PFC controller was developed, which is capable of providing effective control scheme to the MVAC PFC converter to suppress the reverse-recovery current of the boost diode and minimize the voltage stress on switch devices. The corresponding control strategy was proposed and implemented in its design. To reduce the ripple currents in output capacitor, the leading-edge modulation was employed. And programmable turn-on delay time was adopted to realize zero-voltage-switching (ZVS) operation. The IC was designed and simulated in 1.5 /spl mu/m BCD (bipolar-CMOS-DMOS) process. The simulation results showed that the expected specifications were achieved.
{"title":"A novel minimum-voltage active-clamping PFC controller","authors":"Qin Song, Wu Xiaobo, Yan Xiaolang","doi":"10.1109/ICASIC.2005.1611327","DOIUrl":"https://doi.org/10.1109/ICASIC.2005.1611327","url":null,"abstract":"A novel minimum-voltage active-clamping (MVAC) PFC controller was developed, which is capable of providing effective control scheme to the MVAC PFC converter to suppress the reverse-recovery current of the boost diode and minimize the voltage stress on switch devices. The corresponding control strategy was proposed and implemented in its design. To reduce the ripple currents in output capacitor, the leading-edge modulation was employed. And programmable turn-on delay time was adopted to realize zero-voltage-switching (ZVS) operation. The IC was designed and simulated in 1.5 /spl mu/m BCD (bipolar-CMOS-DMOS) process. The simulation results showed that the expected specifications were achieved.","PeriodicalId":431034,"journal":{"name":"2005 6th International Conference on ASIC","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124882137","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}
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