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2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)最新文献

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Smooth bifurcations in 3D-parameter space of Digital-PWM Switched Converter 数字pwm开关变换器三维参数空间的光滑分岔
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750301
J. Taborda, F. Angulo, G. Olivar
{"title":"Smooth bifurcations in 3D-parameter space of Digital-PWM Switched Converter","authors":"J. Taborda, F. Angulo, G. Olivar","doi":"10.1109/LASCAS.2011.5750301","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750301","url":null,"abstract":"In this paper, we propose an analysis of smooth bifurcations in DC-DC buck converters controlled with digital-PWM. The three typical smooth bifurcations: Fold, Flip and Neimark-Sacker bifurcations are detected depending on control parameters. The presence of the three bifurcations in the same converter is not common and it has not been reported in Digital-PWM Switched Converters. Three parameters are varied in the Digital-PWM controller. Two parameters belong to a combined ZAD-FPIC (Zero Average Dynamic and Fixed Point Induced Control) control strategy and the third parameter is associated to Delays in the measured variables.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116955531","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
Efficient energy-aware routing for Sensor Networks 传感器网络的高效能量感知路由
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750315
E. R. Sanchez, Laura M. Murillo, B. Montrucchio, M. Rebaudengo
{"title":"Efficient energy-aware routing for Sensor Networks","authors":"E. R. Sanchez, Laura M. Murillo, B. Montrucchio, M. Rebaudengo","doi":"10.1109/LASCAS.2011.5750315","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750315","url":null,"abstract":"The energy and computational constraints of Wireless Sensor Networks (WSN) have motivated the exploration of efficient routing algorithms. In this paper, a new routing approach is presented which attains the best trade-off between energy expenditure and hop-distance to the sink. The routing algorithm exploits a low-computation metric based on the node's remaining battery. Routing is performed by means of a modified Dijkstra's algorithm which calculates the node's position in the routing tree while computes the least-cost path of all nodes towards the sink. Simulations were performed for different network densities demonstrating that the proposed algorithm enhances the overall energy conservation of the network while efficiently routing data traffic.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129851333","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
Asynchronous burst-mode control for low-power gated-clock finite state machines 低功耗门时钟有限状态机的异步突发模式控制
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750314
D. L. Oliveira, L. S. Ferreira
{"title":"Asynchronous burst-mode control for low-power gated-clock finite state machines","authors":"D. L. Oliveira, L. S. Ferreira","doi":"10.1109/LASCAS.2011.5750314","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750314","url":null,"abstract":"Design of contemporary digital circuits has great need of power reduction. The reasons are owing to portable applications and CMOS Deep-Sub-Micron technology. Finite state machines (FSM) play an important role in these circuits. The partitioning of an FSM into several sub-FSMs is a technique widely used in the reduction of energy consumption. An interesting style for activating and deactivating sub-FSMs is the asynchronous communication proposed by Oelmann. In this paper we propose a high performance control to the asynchronous communication between sub-FSMs. Compared with Oelmann's control, our control consumes less power, occupies less area and has a smaller cycle time.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114719444","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
Hardware implementation of type-2 programmable fuzzifier 2型可编程模糊器的硬件实现
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750264
P. M. S. Rocha Rizol, L. Mesquita, O. Saotome, G. Botura
{"title":"Hardware implementation of type-2 programmable fuzzifier","authors":"P. M. S. Rocha Rizol, L. Mesquita, O. Saotome, G. Botura","doi":"10.1109/LASCAS.2011.5750264","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750264","url":null,"abstract":"The design of full programmable type-2 membership function circuit is presented in this paper. This circuit is used to implement the fuzzifier block of Type-2 Fuzzy Logic Controller chip. In this paper the type-2 fuzzy set was obtained by blurring the width of the type-1 fuzzy set. This circuit allows programming the height and the shape of the membership function. It operates in current mode, with supply voltage of 3.3V. The simulation results of interval type-2 membership function circuit have been done in CMOS 0.35µm technology using Mentor Graphics software.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132065940","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: 12
Design of a CMOS voltage reference using current-model approach 用电流模型方法设计CMOS基准电压
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750297
Flavio Q. de Souza, N. Oki
{"title":"Design of a CMOS voltage reference using current-model approach","authors":"Flavio Q. de Souza, N. Oki","doi":"10.1109/LASCAS.2011.5750297","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750297","url":null,"abstract":"A voltage reference with low sensibility to temperature and power-supply that can generate flexible reference values (from milivolts to several volts) is proposed. Designed for AMS 0.35µm CMOS process, the circuit provides a stable output voltage working in the temperature range of −40–150°C. The proposed reference provides a nominal output voltage of 1.358V with a power-supply of 3.3V.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123713477","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
Implementation of a GMSK communication system on FPGA 基于FPGA的GMSK通信系统的实现
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750316
Juan Felipe Medina Lee, J. Montenegro, Catalina Munoz Morales, Alexander López Parrado, J. J. Gutiérrez
{"title":"Implementation of a GMSK communication system on FPGA","authors":"Juan Felipe Medina Lee, J. Montenegro, Catalina Munoz Morales, Alexander López Parrado, J. J. Gutiérrez","doi":"10.1109/LASCAS.2011.5750316","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750316","url":null,"abstract":"This paper presents the design and implementation of a complete communication system using the GMSK modulation scheme. The hardware is described in VHDL and implemented on Altera FPGA. Additionally, each block used to perform the implementation is completely described accomplishing all the requirements of this kind of modulation. Mueller & Müller algorithm is also performed to ensure timing synchronization between transmitter and receiver. This communication system was developed with educational purposes.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125941451","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: 9
Hybrid simulation using functional single-electron transistor models 使用功能单电子晶体管模型的混合仿真
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750286
A. Sarmiento-Reyes, F. Gonzalez, L. Luis
{"title":"Hybrid simulation using functional single-electron transistor models","authors":"A. Sarmiento-Reyes, F. Gonzalez, L. Luis","doi":"10.1109/LASCAS.2011.5750286","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750286","url":null,"abstract":"Recent advances in the fabrication of single-electron devices (SEDs) and the forthcoming combination of them with nanometric CMOS transistors to form hybrid circuits forcibly put in scene the need of solid and robust simulation methodologies for these classes of circuits. In this paper a verification path that incorporates functional models for the SEDs in order to achieve simulation of bybrid circuits is expound. Several examples illustrate the application of the verification methodology.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129521745","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
An approach to filter-antenna integration in SIW technology SIW技术中滤波天线集成的一种方法
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750291
Omar Nova, J. Bohórquez, N. Peña
{"title":"An approach to filter-antenna integration in SIW technology","authors":"Omar Nova, J. Bohórquez, N. Peña","doi":"10.1109/LASCAS.2011.5750291","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750291","url":null,"abstract":"An original filter-antenna module has been designed, manufactured and measured. The module can be viewed as a high order filter in which the last resonator has been replaced by a resonant antenna element. This antenna is coupled to the other resonators by means of two inter-cavity slots. The module was manufactured using the Substrate Integrated Waveguide technique, which allows the cavities to be fabricated by means of a standard printed circuit board process. Experimental results present good agreement with simulations. The measured return loss response of the filter-antenna module matches that of a second order bandpass filter, with a central frequency of 1.94GHz, a fractional bandwidth of 5.15% and a return loss of 7.5dB at the central frequency. The radiation function is incorporated to this filter's response, with a maximum gain of 5.15dBi and a front-to-back ratio (FTBR) of 29.25dB.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114260707","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: 13
Design and implementation of a LNA in UHF band using microstrip 基于微带的超高频LNA的设计与实现
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750267
S. Rodriguez, A. Correa, A. Fajardo, C. Páez
{"title":"Design and implementation of a LNA in UHF band using microstrip","authors":"S. Rodriguez, A. Correa, A. Fajardo, C. Páez","doi":"10.1109/LASCAS.2011.5750267","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750267","url":null,"abstract":"This article presents a design methodology for low noise amplifiers (LNA) in the UHF band, optimized for narrowband operation, based on a proper choice of the bias operating point, modeling of the active element through S parameters and the appropriate design of matching networks for minimum noise figure and maximum gain under stable conditions. Likewise, presents a case study related with the design of an LNA with this methodology, together with the experimental results and the results simulated with the Ansoft Designer® platform.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122830144","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
Implementations of cyclic cross-ambiguity functions in FPGAs for large scale signals 大规模信号的fpga循环交叉模糊函数实现
2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2011-04-15 DOI: 10.1109/LASCAS.2011.5750266
David Marquez, Juan Valera, Angel Camelo, C. Aceros, M. Jimenez, D. Rodríguez
{"title":"Implementations of cyclic cross-ambiguity functions in FPGAs for large scale signals","authors":"David Marquez, Juan Valera, Angel Camelo, C. Aceros, M. Jimenez, D. Rodríguez","doi":"10.1109/LASCAS.2011.5750266","DOIUrl":"https://doi.org/10.1109/LASCAS.2011.5750266","url":null,"abstract":"This work presents theoretical formulations and algorithm development techniques for implementing the cross-ambiguity function on field programmable gate arrays (FPGA). Signal algebra operator techniques are utilized to formulate the cross-ambiguity function as a composition of cyclic mappings over finite dimensional Hilbert spaces. These formulations of linear operator compositions are proven to be essential to effect large scale FPGA implementations. Results are presented for Virtex 5 implementations of cross-ambiguity function operations using high order numeric sequences of up to 16384 samples in length. These results are being used in the development of a modeling framework for the study of MIMO radar waveform diversity design.","PeriodicalId":137269,"journal":{"name":"2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS)","volume":"25 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132335035","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
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