P. Sowjanya, V. Raghavaiah, P. Murthy, R. Renuka, S. Nagesh, M. Thyagaraj, G. Rajan, K. Govinda
{"title":"EMI coupling to command lines due to solar array switching strings in spacecraft","authors":"P. Sowjanya, V. Raghavaiah, P. Murthy, R. Renuka, S. Nagesh, M. Thyagaraj, G. Rajan, K. Govinda","doi":"10.1109/EDAPS.2014.7030818","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030818","url":null,"abstract":"The satellite as a system consists of various bundles of harness interconnections between subsystems, across the panels. These bundles of harness consist of different types of cables - power lines, data lines, command lines. Power lines from solar array also carry switching currents from the solar array switching circuits. When all these cables are bundled together, it essentially brings out the problem of unintentional electromagnetic energy coupling between the wires. This paper analyzes the amount of coupling in a typical command line placed in close proximity to the power lines carrying switching currents. It is reported that few in-orbit spacecraft on-board anomalies are attributed to spurious commanding due to cable coupling between the command lines and the switching power lines. This analysis considers the different harness configurations of the power lines where such possibilities exist.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128635820","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}
{"title":"Fast incremental 3D full-wave analysis for package-board design iterations via eigen-GCR","authors":"G. Chatterjee, A. Das, D. Gope","doi":"10.1109/EDAPS.2014.7030806","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030806","url":null,"abstract":"In a typical design cycle many iterations on the package-board-system layout may be performed to meet design specifications. In the process, the analysis step needs to be repeated as many times as the number of layout variants. The cost of analysis, especially if using a 3D fullwave extraction methodology, therefore becomes prohibitive for large-scale analysis in the design process. In this paper, a methodology is proposed to expedite analysis of subsequent layout iterations based on information stored from previous layout solution. The efficiency of a Method of Moments (MoM) based 3D full-wave solution is limited by the slow convergence of the iterative solver in a fast solver framework. In this work, eigen-vectors from a previously solved layout is used to augment to the Krylov subspace to expedite the convergence of a Generalized Conjugate Residual (GCR)-based iterative solution for next layout. Numerical results demonstrate up to 40% improvement in the convergence properties using the proposed GCR method.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130231112","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}
T. Nakura, Masahiro Kano, M. Yoshizawa, Seisei Oyamada, A. Hattori, K. Asada
{"title":"Resonant power supply noise reduction using on-die decoupling capacitors embedded in organic interposer","authors":"T. Nakura, Masahiro Kano, M. Yoshizawa, Seisei Oyamada, A. Hattori, K. Asada","doi":"10.1109/EDAPS.2014.7030823","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030823","url":null,"abstract":"This paper demonstrates an on-die STO thin film decoupling capacitor used for resonant power supply noise reduction. The on-die STO capacitor consists of STO whose dielectric constant is about 20 and is sandwitched by Cu films in an organic interposer on which we can also draw connection wires by Cu deposition. The capacitor was attached directly on our test chip using ball banding technique through PADs connection. Our experimental results using a real silicon chip shows that our on-die STO capacitor achieved significant resonant supply noise reduction. This result also shows that we can reduce the power supply noise without chip area penalty, and also it enables us to modify the noise characteristics even after the chip fabrication process.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129719098","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}
G. Anand, Vijender Kumar, Mallikarjun Vasa, B. Mutnury
{"title":"Challenges of using flex cables in high speed serial links","authors":"G. Anand, Vijender Kumar, Mallikarjun Vasa, B. Mutnury","doi":"10.1109/EDAPS.2014.7030820","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030820","url":null,"abstract":"Blade servers are constantly moving towards higher data rates and smaller form factor resulting in complex routing choices to accommodate various chassis configurations. Flexible printed circuit (FPC) cables or flex cables serve as a good choice for interconnect medium in such densely configured server systems. In this paper, various challenges involved in designing a high speed serial link using flex cables are discussed. The impact of flex cable stack-up choice on signal integrity (SI) performance (impedance and loss) is studied. Sensitivity analysis on flex cable impedance and loss are performed by taking various flex cable design parameters into account using 3-D full wave modeling results. Best design practices needed for FPC cables are discussed in detail. Finally, SATA 3.0 interface is used as an example to demonstrate the design trade-offs of flex cable.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129772906","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}
{"title":"Inter layer crosstalk between stripline and metal patch","authors":"Chun-Lin Liao","doi":"10.1109/EDAPS.2014.7030813","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030813","url":null,"abstract":"The crosstalk between stripline and the power plane on an adjacent layer in a multilayer printed circuit board (PCB) are analyzed and shown. Different methods of suppressing this crosstalk effect are discussed and compared.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130955067","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}
Xi-Wang Yuan, Xiaochun Li, Ning Wang, Xiao-Jian Ma, Yan Shao, J. Mao
{"title":"High-speed data transmission system using half mode substrate integrated waveguide","authors":"Xi-Wang Yuan, Xiaochun Li, Ning Wang, Xiao-Jian Ma, Yan Shao, J. Mao","doi":"10.1109/EDAPS.2014.7030826","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030826","url":null,"abstract":"A high-speed data transmission system using half mode substrate integrated waveguide (HMSIW) is proposed in this paper. The HMSIW transmits the signal by TE0.5,0 mode so the channel bandwidth is from the cutoff frequency of TE0.5,0 mode to the cutoff frequency of TE1.5,0 mode. In contrast, the traditional SIW transmits the signal by TE10 mode and the channel bandwidth is from the cutoff frequency of TE10 mode to the cutoff frequency of TE20 mode. Therefore, the bandwidth of the proposed HMSIW is 2 times larger than that of the traditional SIW with 2 times waveguide width of HMSIW. Comparison between the interconnect systems based on HMSIW and SIW shows that the HMSIW-based interconnect system has a better performance in high-speed data transmission. The data transmission rate of the proposed HMSIW system can reach up to 7.5 Gbps while that of the traditional SIW system is only 5Gbps with the same condition.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126482667","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}
Ji Zhang, Xiaochun Li, Ning Wang, Na Li, Sheng-jie Guo, J. Mao
{"title":"A super wideband X-complementary split ring resonator structure for power distribution network","authors":"Ji Zhang, Xiaochun Li, Ning Wang, Na Li, Sheng-jie Guo, J. Mao","doi":"10.1109/EDAPS.2014.7030817","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030817","url":null,"abstract":"In this paper, A novel wide-band uniplanar electromagnetic band gap (EBG) structure composed of complimentary split ring resonator (CSRR) and X shape bridge, called the X-CSRR EBG structure, is proposed to suppress ground bounce noise (GBN) and simultaneous switching noise (SSN) in power ground plane. Compared with conventional uniplanar EBG structures, such as the AI-EBG structure and the S-EBG structure, the proposed X-CSRR EBG structure has more noise suppression depth and larger noise suppression bandwidth. The stop-band of the proposed structure can span from 520MHz to 30GHz with -30dB noise suppression standard. Both the simulation and measured results are represented to verify the noise suppression performance of the proposed X-CSRR EBG structure.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124196120","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}
{"title":"Eye-height/width prediction from S-Parameters using bounded size training set for ANN","authors":"N. Ambasana, D. Gope, B. Mutnury, G. Anand","doi":"10.1109/EDAPS.2014.7030804","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030804","url":null,"abstract":"Validation of high-speed interface performance in a given design space from a Signal Integrity (SI) perspective requires Bit Error Rate (BER) computation. Eye Height (EH) and Eye Width (EW) are used to determine the quality of an interface for a given set of design parameters and frequency of operation. EH, EW and BER estimation requires Time Domain (TD) simulation of complex channel models over billions of bits, which is a time, compute power and memory intensive process. Statistical and optimization techniques such as Design of Experiments (DoE) based on generation of design sets that span the design space optimally exist today. However, it has been shown that DoE based simulations might result in in-accurate sensitivity analysis for highly nonlinear design spaces. Also, the size of a DoE set scales exponentially with the number of design variables. It has been shown in [5] that TD metrics EH and EW, in absence of cross-talk, can be mapped from FD metrics like Return Loss (RL) and Insertion Loss (IL) using Artificial Neural Networks (ANN). The training of the ANNs requires DoE for the existing method. In this paper, an alternative technique to DoE, for generating a training set for ANN is presented, which remains constant over several number of design variables, and scales only in the number of FD metrics used to map to TD metrics and the number of samples in FD. Simulations for SATA 3.0 channel topology with and without cross-talk in TD are presented to quantify the accuracy of the said approach.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124957537","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}
{"title":"Fast and accurate technique to decompose jitter for very long pattern length waveform","authors":"J. Kho, Tan Yih Ling","doi":"10.1109/EDAPS.2014.7030815","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030815","url":null,"abstract":"Protocols such as CEI, 10G Ethernet and PCIe Gen3 are requiring very long pattern length stress signals such as PRBS-23 and PRBS-31 to claim compliance and ensure robustness. Unfortunately, there is equipment limitation to directly measure very long pattern signals especially on oscilloscopes due to memory size and signal processing power. Thus, new jitter decomposition algorithms are introduced to measure these long stress patterns through behavioral modeling [1-3]. However, there are accuracy concerns with these new measurement methodologies because of incidences of false results when users attempt to qualify or debug a circuit. This paper will explore the limitations of different jitter decomposition algorithms from major equipment vendors in the industry when measuring very long pattern length waveforms. We will also provide the measurement method and calculations required to obtain the correct jitter decomposition. Correlation of the calculated number against direct measurement using bit error rate tester (BERT) is also done to prove the hypothesis and validate accuracy of the methodology. The findings in this paper are very beneficial in assisting the industry to perform accurate jitter measurements with shorter test time to achieve robust designs as well as prevent precious resources from being spent on investigating false failures. The findings also allow companies to show that their products are tested under stringent conditions that satisfy customer requirements.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125043763","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}
Saravanan Sethuraman, A. Lingambudi, Kenneth Wright, Abhijit Saurabh, Kyu-Hyoun Kim, D. Becker
{"title":"Vref optimization in DDR4 RDIMMs for improved timing margins","authors":"Saravanan Sethuraman, A. Lingambudi, Kenneth Wright, Abhijit Saurabh, Kyu-Hyoun Kim, D. Becker","doi":"10.1109/EDAPS.2014.7030810","DOIUrl":"https://doi.org/10.1109/EDAPS.2014.7030810","url":null,"abstract":"JEDEC DDR4 SDRAM adopted the internal Data (DQ) reference voltage (VREFDQ) generation scheme as opposed to DDR3 SDRAM where VREF was generated by an external device that produced fixed (constant) voltage irrespective of the loading on the device, power supply variations, temperature changes, and the passage of time. With the introduction of Per DRAM Addressability (PDA) in DDR4 memory and the internal VREF combined, discussed in this paper is a novel approach to determine the best VREF settings for a given topology. We will use memory controller built-in-self-test (MCBIST) to get a stressed pattern in place of simple Multi Purpose Register (MPR) data pattern and will be exercised as part of post DRAM training. Data pattern complexity, total training time and accuracy of training are investigated and optimized. Initial training of the DRAM is done with the initial VREF calculated based on driver strength and On Die Termination (ODT) condition. Complexities of different VREF settings are applied on multiple ranks in the same DIMM using the PDA to maximize timing margin and power efficiency. Per-DRAM VREF training has been also performed using PDA to study tradeoff between timing margin and total training time. Our results show significant benefits with respect to PDA vs rank basis Vref training.","PeriodicalId":387223,"journal":{"name":"2014 IEEE Electrical Design of Advanced Packaging & Systems Symposium (EDAPS)","volume":"309 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116378217","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}