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[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems最新文献

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Performance of a high-precision digital tuning algorithm 一种高精度数字调谐算法的性能
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252170
C. Yu, W. Bliss, R. Geiger
{"title":"Performance of a high-precision digital tuning algorithm","authors":"C. Yu, W. Bliss, R. Geiger","doi":"10.1109/MWSCAS.1991.252170","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252170","url":null,"abstract":"An iterative digital tuning algorithm has been reviewed and simulated extensively, and its functionality has been investigated experimentally. This tuning algorithm is applicable to digitally programmable continuous-time filters. The algorithm estimates filter characterization parameters based on a system identification method and calculates control parameters for tuning adjustments. Extensive simulations show that this algorithm converges to a solution within 10 iterations in most cases, even in the presence of various measurement errors, parameter variations, and overordering effects. This algorithm is very insensitive to initial parameter variations, as good results are obtained even with 30% parameter error. This algorithm also attains good speed and accuracy in the presence of 5% measurement errors and high overordering effects. Experimental results with a second-order monolithic programmable OTA-C (operational transconductance amplifier and capacitor) integrated circuit filter verify the robustness of the algorithm in tuning continuous-time filters.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"40 1","pages":"356-359 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88802171","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
Silicon models of lateral inhibition 横向抑制的硅模型
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.251995
S. Wolpert, E. Micheli-Tzanakou
{"title":"Silicon models of lateral inhibition","authors":"S. Wolpert, E. Micheli-Tzanakou","doi":"10.1109/MWSCAS.1991.251995","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.251995","url":null,"abstract":"Lateral inhibition is characterized in two CMOS VLSI-based sensory arrays with different pixel geometries and inhibitory algorithms. In these arrays, each sensory pixel inhibits, and in turn, is inhibited by each of its immediate neighbors. Test results indicate that both circuits are able to enhance the contrast of arbitrary two-dimensional images, and do so in a manner that is dynamically stable. Achieving this enhancement on sensory images immediately and simultaneously, this operation offers performance at a level not obtainable by software methods. As such, it is well suited for machine vision systems that utilize parallel architectures.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"41 1","pages":"788-791 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87535325","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
70 MHz fiber optic transmission from satellite DBS receiving antenna 70兆赫光纤传输从卫星DBS接收天线
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252025
N. A. Rabou, H. Ikeda, J. Li, H. Yoshida, S. Shinohara, E. Tsuchiya, K. Nishimura
{"title":"70 MHz fiber optic transmission from satellite DBS receiving antenna","authors":"N. A. Rabou, H. Ikeda, J. Li, H. Yoshida, S. Shinohara, E. Tsuchiya, K. Nishimura","doi":"10.1109/MWSCAS.1991.252025","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252025","url":null,"abstract":"A broadcast satellite signal after conversion into an intermediate frequency (IF) signal at 70 MHz has been transmitted through an optical fiber in order to distribute the signal to the DBS (direct broadcasting satellite) receiver in a remote location. Based on experiments, it was found that a fiber-optic link allowed the designers to have greater flexibility than coaxial cables, and that light emitting diodes were attractive not only in terms of cost-effectiveness but also in terms of simplicity. The optical transmitter and receiver circuits built for experimental use were inexpensive and simple in circuit configuration. The distortion factor of the audio signal was less than 1% with a signal-to-noise ratio (SNR) of 70 dB. The differential gain and differential phase of the fiber-optic transmission system were less than 1% and 1 degree, respectively, and the SNR of the video signal was 46 dB.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"2 1","pages":"662-665 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87042216","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
A soft starting AC voltage regulator 一种软启动交流稳压器
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252155
K. J. Herman
{"title":"A soft starting AC voltage regulator","authors":"K. J. Herman","doi":"10.1109/MWSCAS.1991.252155","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252155","url":null,"abstract":"A circuit has been designed and proven successful in protecting devices from sudden full power activity. This has been accomplished by using an active device as a varying resistance dependent on the supply voltage. The active device first appears as a large resistance and slowly decreases to a near-zero resistance, allowing all the voltage of the supply to be seen at the load. Other irregularities such as amplitude variation may be detected by a controlling circuit, which would also vary the gate-to-source voltage accordingly.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"32 1","pages":"184-185 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87762279","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
Quadratic weights for large scale regulators 大型调节器的二次权
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252199
S. Mahil, S. Bommaraju, K. Gopalan
{"title":"Quadratic weights for large scale regulators","authors":"S. Mahil, S. Bommaraju, K. Gopalan","doi":"10.1109/MWSCAS.1991.252199","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252199","url":null,"abstract":"A large-scale model is reduced to a low-order robust model by using principal component analysis. The low-order model is partitioned into (decoupled) subsystems by projecting the directions of strong influence in individual input(s) and output(s) on the state space of the reduced model. Quadratic weights are determined for the individual decoupled subsystems. These weights are used in the quadratic performance index for the reduced model. The quadratic weights for the original large-order model can easily be determined from the reduced performance index. The reduced performance index is sufficient to determine a robust low-order optimal controller for the large-order system. A ninth-order model of a chemical reactor having four inputs and three outputs is considered as an example.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"96 1","pages":"478-481 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85230023","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
Synthesis of worst-case optimal controllers over a finite horizon 有限视界上最坏情况最优控制器的综合
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252116
M. Subrahmanyam
{"title":"Synthesis of worst-case optimal controllers over a finite horizon","authors":"M. Subrahmanyam","doi":"10.1109/MWSCAS.1991.252116","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252116","url":null,"abstract":"Necessary conditions are developed for a finite-horizon version of the H/sub infinity / optimal control problem. Problems involving generalized cost functionals and nonzero initial conditions are considered. A criterion for the evaluation of the performance index is given in these cases. The author's computational experience shows that the finite-horizon performance is useful in computing the infimal H/sub infinity / norm in the infinite horizon case, as the final time becomes large. Also, expressions are derived for the variation in performance in terms of system parameter variations. These linear expressions are useful in the evaluation of the robustness of the proposed control strategy.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"R-32 1","pages":"8-12 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84758186","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 temperature dependent SPICE macro-model for power MOSFETs 功率mosfet的温度相关SPICE宏观模型
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252091
D. Pierce
{"title":"A temperature dependent SPICE macro-model for power MOSFETs","authors":"D. Pierce","doi":"10.1109/MWSCAS.1991.252091","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252091","url":null,"abstract":"A power MOSFET SPICE macro-model suitable for use over the temperature range -55 to 125 degrees C has been developed. The model is composed of a single parameter set with temperature dependence accessed through the SPICE.TEMP card. SPICE parameter extraction techniques for the model and model predictive accuracy are discussed. Though complex, the model and approach to parameter extraction are straightforward. As all the parameter extraction algorithms are analytic in nature, automation of the extraction process is straightforward and requires no special optimization routines. The addition of a power MOSFET model to the SPICE code would result in more robust and efficient simulations.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"10 1","pages":"597-601 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78756722","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
A universal circuit for studying chaos in Chua's circuit family 研究蔡氏电路家族混沌的通用电路
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.251999
G. Lin
{"title":"A universal circuit for studying chaos in Chua's circuit family","authors":"G. Lin","doi":"10.1109/MWSCAS.1991.251999","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.251999","url":null,"abstract":"The author presents a canonical piecewise-linear circuit capable of realizing every member of Chua's circuit family. It contains only six two-terminal elements; five of them are linear resistors, capacitors, and inductors, and only one element is a three-segment piecewise-linear resistor. It is canonical in the sense that: it can exhibit all possible phenomena associated with any three-region symmetric piecewise-linear continuous vector field, and it contains the minimum number of circuit elements needed for such a circuit. Using this circuit, many chaotic attractors which have not been observed before have been found. Among them, the author reports on a special example: a nonfractal chaotic attractor.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"5 1","pages":"772-775 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88320115","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
CAPZ-a PC program for switched-capacitor filter analysis in the z-transform domain 一个用于在z变换域中分析开关电容滤波器的PC程序
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252144
A. de Queiroz, L. Calôba
{"title":"CAPZ-a PC program for switched-capacitor filter analysis in the z-transform domain","authors":"A. de Queiroz, L. Calôba","doi":"10.1109/MWSCAS.1991.252144","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252144","url":null,"abstract":"A description is given of the CAPZ program, which analyzes switched-capacitor filters, computing z-transform transfer functions. It can plot gain and phase versus frequency curves, poles and zeros, and time responses. The transfer functions are computed by FFT (fast Fourier transform) interpolation. Time and frequency responses are computed from the transfer functions, allowing the analysis to be swiftly completed.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"50 1","pages":"134-137 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79253621","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
Small signal analysis of parallel resonant converters 并联谐振变换器的小信号分析
[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems Pub Date : 1991-05-14 DOI: 10.1109/MWSCAS.1991.252006
K. Siri, I. Batarseh, C. Q. Lee
{"title":"Small signal analysis of parallel resonant converters","authors":"K. Siri, I. Batarseh, C. Q. Lee","doi":"10.1109/MWSCAS.1991.252006","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252006","url":null,"abstract":"The small signal analysis of the conventional parallel resonant converter (PRC), operating in the continuous conduction mode, is presented. This analysis is based on the state-plane diagram approach that has been successfully applied to the steady-state analysis of resonant converters. Using the perturbation method on the steady-state trajectory, a discrete small signal model for the converter can be derived from the input voltage, controlled switching frequency, and state variable perturbations. It can be shown that this method of analysis can be applied to resonant converters in general. Using the derived small signal model, the frequency response of the PRC can be calculated. Simulated and experimental results verify the theoretical approach.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"35 1","pages":"739-742 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85476116","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
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