{"title":"Electromechanical performance comparison for different CMUT element geometries","authors":"J. Mendoza-Lopez, C. Sánchez-López","doi":"10.1109/SMACD.2012.6339429","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339429","url":null,"abstract":"Different capacitive micromachined ultrasonic transducers (CMUTs) element geometries and fabrication techniques have been proposed through the years though the questions of which element geometry suits each application best as well as further geometrical, array and design parameter optimization techniques still remain open. This paper proposes a thorough comparison between square, hexagonal and circular CMUT elements and geometries through finite element method (FEM) simulations and provides results comparing their respective electromechanical parameters.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131466579","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":"Simple and accurate modeling of double-gate FinFET fin body variations","authors":"D. Kim, Yesung Kang, Youngmin Kim","doi":"10.1109/SMACD.2012.6339390","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339390","url":null,"abstract":"This paper presents a simple and accurate model for determining Ion and Ioff of a double-gate FinFET with varying gate fin shapes. Simulations show that gate fin shape variation results in significant changes in the leakage and driving capability of the device. We perform TCAD simulations of double-gate FinFET structures in order to analyze the effect of the gate fin body thickness (Tsi) variation on the electrical properties of the device. The thicknesses of the source and drain side are found to have different effects on the device. A simple model is proposed using the threshold voltage change due to the thickness variation along the gate fin. Simulation results show that the models match well with Ion and Ioff within 1.3% and 4.8% errors, respectively. In addition, we propose an optimal fin body shape to reduce the leakage current while providing a similar driving current to that in the nominal FinFET.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120964917","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":"SCALES - A behavioral simulator for pipelined analog-to-digital converter design","authors":"C. Silva, N. Horta, J. Guilherme, P. Ayzac","doi":"10.1109/SMACD.2012.6339439","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339439","url":null,"abstract":"The design of analog-to-digital converters (ADCs) requires a starting phase to specify system parameters which define the basic characteristics of the target converter. This initial phase is usually made using some kind of behavior modeling. The development of an ADC simulator requires the behavior modeling of the basic building blocks and their possible interconnections to form the final converter. This paper presents a Pipeline ADC simulator tool (SCALES) which allows topology selection and digital calibration of the frontend blocks. Several block non-linearity's are included in the simulation, such as thermal noise, capacitor mismatch, gain and offset errors, parasitic capacitances, settling errors and other error sources. SCALES was developed in Python to allow platform independence in today's computer systems.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121496733","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}
F. Marquez, F. Muñoz, F. R. Palomo, M. Aguirre, M. Ullán
{"title":"Automatic inspection of SET sensitivity in analog cells","authors":"F. Marquez, F. Muñoz, F. R. Palomo, M. Aguirre, M. Ullán","doi":"10.1109/SMACD.2012.6339394","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339394","url":null,"abstract":"In this paper, a software simulation tool for automation of electrical sensitivity analysis of Single Event Effects (SEE) is presented. In particular, the proposed tool can be used to check the error sensitivity of analog designs with large number of transistors. The proposed methodology allows a rapid location of critical nodes in order to ensure a proper radiation-hardened performance under the influence of current injected Single Event Transient Effects (SET). As a case study, several operational amplifier architectures have been designed and simulated in a 130 nm CMOS technology, validating the performance of the implemented analysis method.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129205962","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}
A. Cooman, E. Geerardyn, G. Vandersteen, Y. Rolain
{"title":"Determining the dominant nonlinear contributions in a multistage op-amp in a feedback configuration","authors":"A. Cooman, E. Geerardyn, G. Vandersteen, Y. Rolain","doi":"10.1109/SMACD.2012.6339453","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339453","url":null,"abstract":"In this paper a simulation based method is proposed to determine the position of the dominant nonlinear contribution in the schematic of multistage op-amp operated in a feedback configuration. The key idea is to combine the Best Linear Approximation (BLA) and a classical noise analysis to determine the dominant source of nonlinear contributions. This results in a powerful yet simple design tool which does not require special analyses or custom models. As an example, the method is applied to a folded-cascode op-amp.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130466991","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":"Temperature sensor placement including routing overhead and sampling inaccuracies","authors":"P. Ituero, F. García-Redondo, M. López-Vallejo","doi":"10.1109/SMACD.2012.6339419","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339419","url":null,"abstract":"Dynamic thermal management techniques require a collection of on-chip thermal sensors that imply a significant area and power overhead. Finding the optimum number of temperature monitors and their location on the chip surface to optimize accuracy is an NP-hard problem. In this work we improve the modeling of the problem by including area, power and networking constraints along with the consideration of three inaccuracy terms: spatial errors, sampling rate errors and monitor-inherent errors. The problem is solved by the simulated annealing algorithm. We apply the algorithm to a test case employing three different types of monitors to highlight the importance of the different metrics. Finally we present a case study of the Alpha 21364 processor under two different constraint scenarios.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128467529","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":"A circuit synthesis technique based on network determinant expansion","authors":"V. Filaretov, K. Gorshkov, A. Mikheenko","doi":"10.1109/SMACD.2012.6339397","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339397","url":null,"abstract":"In this paper we present a simple technique of analog electronic circuits synthesis by means of a linear representation. The approach is based on generalized parameter extraction method. It describes the procedure for developing the circuit topology both for passive or active circuits. The input data for the proposed synthesis method are the arbitrary network function approximated in polynomial form and specified elements set. In contrast to other synthesis approaches the proposed technique provides the realization of full set of equivalent circuits and allow to choose the best circuit solutions by various criteria. Experiments conducted on the low-pass filter design demonstrate the simplicity and effectiveness of synthesis method.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134458167","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":"A formal equivalence checking methodology for Simulink and Register Transfer Level designs","authors":"M. O. Saglamdemir, A. Sen, G. Dundar","doi":"10.1109/SMACD.2012.6339457","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339457","url":null,"abstract":"Driven by the increase in complexity of design, time-to-market pressure and the need for a high level of collaboration between multiple discipline teams in a project, model based design has become the inevitable choice for IC Design projects. High-level models are being substantially used as the reference for implementation of the Register Transfer Level (RTL) counterpart of the designs. In that respect, Matlab/Simulink is one of the adopted high level modeling platforms in the IC design industry. However, checking the formal equivalence of the models with their RTL counterparts is still an area of interest to be investigated. In this study, a methodology addressing that matter is proposed. Simulink models of interest in this paper comprise built-in Simulink blocks, Stateflow blocks modeling the state machines, and user-defined blocks. Proposed methodology utilizes Simulink's Hardware Design Language (HDL) Coder and Real Time Workshop (RTW) tools, Mentor Graphics' Catapult, and Synopsys' Formality in the flow. Building of the methodology is explained with a simple example. Then the methodology is applied to multiple designs, including Advanced Encryption Standard (AES) to verify its applicability.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"29 18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132089020","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":"Hierarchical model-order reduction for robust design of parameter-varying systems","authors":"M. Hauser, C. Salzig","doi":"10.1109/SMACD.2012.6339430","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339430","url":null,"abstract":"In this paper we introduce a robust method for the model-driven design of reduced parameter-varying analog systems. The ideas behind our approach are twofold: On the one hand we present an algorithm for decreasing the model order of large systems. It utilizes the hierarchical structure of compound systems to simplify component models while ensuring the validity of the composed model. On the other hand we announce a statistical method for reducing circuit equations with parameter variations. Combining both we generate symbolic behavioral models of real-world analog circuits under process variations. Finally, for illustrating we apply the overall procedure to the operational amplifier OpAmp 741 with varying parameters.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129075499","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":"Variability aware support vector machine based macromodels for statistical estimation of subthreshold leakage power","authors":"L. Garg, V. Sahula","doi":"10.1109/SMACD.2012.6339387","DOIUrl":"https://doi.org/10.1109/SMACD.2012.6339387","url":null,"abstract":"In this paper, we present an accurate and efficient stack based macromodel for statistical subthreshold leakage power characterization of cmos gates. Our methodology is based on first characterizing the leakage power of basic stacks and then estimating the subthreshold leakage power of gates based on these stacks. We develop support vector machine (SVM) based macromodels to characterize the transistor stacks of cmos gates, while accounting the combined effect of process variation in length (L), threshold voltage (Vth), oxide thickness (Tox), supply voltage (0.6v-1.2v), temperature (0°C-100°C) and width (45nm-200nm) scalable at the same time. Our experiments show that we only need 30 stack models to predict the subthreshold leakage power of 7 basic gates across 58 input combinations. SVM based models have the ability to predict the leakage power with maximum average error of less than 0.634% in mean for 4 input NOR gate and maximum average error of 1.952% in standard deviation for 3 input NOR gate. Our results also show that there is on the average 17× improvement in runtime for estimating the mean and standard deviation of leakage power of a gate with 5000 Monte Carlo simulations.","PeriodicalId":181205,"journal":{"name":"2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115499827","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}