Pub Date : 1995-08-13DOI: 10.1109/MWSCAS.1995.510239
P. Santos, J. Franca, R. Schaumann
This paper discusses design and tuning techniques for a narrow-bandwidth sixth-order Chebyshev bandpass continuous-time filter at very-high-frequencies. The direct simulation of a doubly terminated LC ladder filter formed by three capacitor-coupled grounded resonator sections employs capacitors and operational transconductance amplifiers for implementation in a standard digital 1.2 /spl mu/m CMOS process. The automatic adjustment of both the center frequency and quality factor is based on the successive approximation tuning algorithm.
{"title":"Design and tuning techniques for a 100 MHz CMOS continuous-time narrow-bandwidth bandpass filter","authors":"P. Santos, J. Franca, R. Schaumann","doi":"10.1109/MWSCAS.1995.510239","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510239","url":null,"abstract":"This paper discusses design and tuning techniques for a narrow-bandwidth sixth-order Chebyshev bandpass continuous-time filter at very-high-frequencies. The direct simulation of a doubly terminated LC ladder filter formed by three capacitor-coupled grounded resonator sections employs capacitors and operational transconductance amplifiers for implementation in a standard digital 1.2 /spl mu/m CMOS process. The automatic adjustment of both the center frequency and quality factor is based on the successive approximation tuning algorithm.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"1 16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127981643","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504375
Joon-Yub Kim, R. Geiger
A charge conserving macromodel suitable for the simulation of the charge injection behavior of MOSFET switches is presented. Simulation results using the macromodel are compared with the experimental data in the literature. The performance of the macromodel at high switching speed is demonstrated.
{"title":"A charge conserving macromodel for MOSFET's","authors":"Joon-Yub Kim, R. Geiger","doi":"10.1109/MWSCAS.1995.504375","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504375","url":null,"abstract":"A charge conserving macromodel suitable for the simulation of the charge injection behavior of MOSFET switches is presented. Simulation results using the macromodel are compared with the experimental data in the literature. The performance of the macromodel at high switching speed is demonstrated.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128997438","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504384
H. H. Ali, M. Zaghloul
In this paper we present a mixed digital analog approach for VLSI implementation of an associative memory model using temporal relations. The proposed model is based on the biological model of the cortex. There are two motivations for this research. First, the analog and the parallel nature of the neural network approach may provide an efficient technique to achieve the high speed requirement for real time coding systems with less hardware than both digital techniques and adaptive neural techniques. Second, the model proposed based on the biological neural network may be useful as a model of the information processing in human brain. The proposed model overcomes the drawbacks of the linear associative memory. The proposed circuit realizing such a theory is faster, smaller in area, and more efficient than the current systems.
{"title":"CMOS temporal associative memory","authors":"H. H. Ali, M. Zaghloul","doi":"10.1109/MWSCAS.1995.504384","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504384","url":null,"abstract":"In this paper we present a mixed digital analog approach for VLSI implementation of an associative memory model using temporal relations. The proposed model is based on the biological model of the cortex. There are two motivations for this research. First, the analog and the parallel nature of the neural network approach may provide an efficient technique to achieve the high speed requirement for real time coding systems with less hardware than both digital techniques and adaptive neural techniques. Second, the model proposed based on the biological neural network may be useful as a model of the information processing in human brain. The proposed model overcomes the drawbacks of the linear associative memory. The proposed circuit realizing such a theory is faster, smaller in area, and more efficient than the current systems.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126758715","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504445
R.B. Nunes, C.E.T. Oliveira, M. L. Anido
This paper presents a novel approach to perform circuit verification, particularly Design Rule Checking (DRC), using a data structure based on maximally-horizontal layout regions termed spans. The paper also discusses the characteristics required by a data structure to properly support different tasks such as graphics editing, design rule checking and circuit extraction. Most of the basic and primitive operations, necessary to support design rule checking on a circuit using a layout representation based on spans, are presented and special attention is paid to the solution of the difficult test of 45 degrees width (and also spacing) violation.
{"title":"A novel approach to perform circuit verification using spans","authors":"R.B. Nunes, C.E.T. Oliveira, M. L. Anido","doi":"10.1109/MWSCAS.1995.504445","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504445","url":null,"abstract":"This paper presents a novel approach to perform circuit verification, particularly Design Rule Checking (DRC), using a data structure based on maximally-horizontal layout regions termed spans. The paper also discusses the characteristics required by a data structure to properly support different tasks such as graphics editing, design rule checking and circuit extraction. Most of the basic and primitive operations, necessary to support design rule checking on a circuit using a layout representation based on spans, are presented and special attention is paid to the solution of the difficult test of 45 degrees width (and also spacing) violation.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126927821","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510190
M. Marzouki, V. Castro Alves, A. Ribeiro Antunes
Progress in synthesis development has made commercially available tools that allow automatic synthesis of designs, starting from their RTL description. More recently, some tools even starting from the behavioral description have appeared on the market. However, the synthesized designs an rather hard to test. What is commonly achieved is to add testability features at the gate level, after the synthesis process has been done, which results in high area overhead and poor design performances. A lot of research work is currently on-going trying to take into account testability features at higher levels, that is, RTL or even behavioral level. We propose a general framework for an efficient high-level synthesis or testability methodology.
{"title":"High-level synthesis for testability","authors":"M. Marzouki, V. Castro Alves, A. Ribeiro Antunes","doi":"10.1109/MWSCAS.1995.510190","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510190","url":null,"abstract":"Progress in synthesis development has made commercially available tools that allow automatic synthesis of designs, starting from their RTL description. More recently, some tools even starting from the behavioral description have appeared on the market. However, the synthesized designs an rather hard to test. What is commonly achieved is to add testability features at the gate level, after the synthesis process has been done, which results in high area overhead and poor design performances. A lot of research work is currently on-going trying to take into account testability features at higher levels, that is, RTL or even behavioral level. We propose a general framework for an efficient high-level synthesis or testability methodology.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123199993","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510250
Shue-Lee Chang, T. Ogunfunmi
We implement a two-dimensional 8/spl times/8 fast discrete cosine transform and its inverse by the Feig's algorithm which is recognized the fastest method so far and this algorithm potentially has very wide applications. All the equations are derived in detail. The verification and evaluation are proved by computer simulation. The result of real application in MPEG1 is also presented.
{"title":"A fast DCT (Feig's algorithm) implementation and application in MPEG1 video compression","authors":"Shue-Lee Chang, T. Ogunfunmi","doi":"10.1109/MWSCAS.1995.510250","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510250","url":null,"abstract":"We implement a two-dimensional 8/spl times/8 fast discrete cosine transform and its inverse by the Feig's algorithm which is recognized the fastest method so far and this algorithm potentially has very wide applications. All the equations are derived in detail. The verification and evaluation are proved by computer simulation. The result of real application in MPEG1 is also presented.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126325594","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504373
B. Iñíguez, E. G. Moreno
An explicit physically-based C/sub /spl infin//-continuous MOSFET modeling for all regions of operation is presented. The model accurately includes the small-geometry effects. As a consequence good agreement with measurements is observed and currents and their derivatives show smooth transitions between regions. Therefore the model is very suitable for analog applications, especially in the moderate inversion region.
{"title":"C/sub /spl infin//-continuous small-geometry MOSFET modeling for analog applications","authors":"B. Iñíguez, E. G. Moreno","doi":"10.1109/MWSCAS.1995.504373","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504373","url":null,"abstract":"An explicit physically-based C/sub /spl infin//-continuous MOSFET modeling for all regions of operation is presented. The model accurately includes the small-geometry effects. As a consequence good agreement with measurements is observed and currents and their derivatives show smooth transitions between regions. Therefore the model is very suitable for analog applications, especially in the moderate inversion region.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122312208","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504477
Ing-Song Lin, S. Mitra
The concept of overlapped block digital filtering is extended to two-dimensional (2D) case. The shift-invariant conditions of 2D overlapped block digital filters are derived. Fast algorithms based on short-length linear convolution algorithms and DFT are then derived. These algorithms are computationally efficient and highly parallel.
{"title":"Efficient 2D FIR filtering algorithms based on overlapped block structure","authors":"Ing-Song Lin, S. Mitra","doi":"10.1109/MWSCAS.1995.504477","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504477","url":null,"abstract":"The concept of overlapped block digital filtering is extended to two-dimensional (2D) case. The shift-invariant conditions of 2D overlapped block digital filters are derived. Fast algorithms based on short-length linear convolution algorithms and DFT are then derived. These algorithms are computationally efficient and highly parallel.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116090960","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504511
J. Delgado-Romero, J.A.R. Estrada, F. Romero
In this paper we describe a sufficient condition by means of a simpler test that guarantees stability of a linear time-invariant system with parametric uncertainty in the "A" matrix, The parametric uncertainty is represented by an interval matrix. The proposed test is simpler than the existing ones. It is based on the eigenvalues of the Hermitian part of L and P (for the continuous case), and the spectral radius of the Hermitian and skew-Hermitian part of L and P. An upper bound for the continuous case /spl phi/ is derived from their maximum eigenvalues; and and upper bound for the discrete case /spl xi/, is derived from their spectral radius. The results presented are for the general case of an interval matrix.
{"title":"Some tests to determine the Hurwitz-stability and the Schur-stability of an interval matrix","authors":"J. Delgado-Romero, J.A.R. Estrada, F. Romero","doi":"10.1109/MWSCAS.1995.504511","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504511","url":null,"abstract":"In this paper we describe a sufficient condition by means of a simpler test that guarantees stability of a linear time-invariant system with parametric uncertainty in the \"A\" matrix, The parametric uncertainty is represented by an interval matrix. The proposed test is simpler than the existing ones. It is based on the eigenvalues of the Hermitian part of L and P (for the continuous case), and the spectral radius of the Hermitian and skew-Hermitian part of L and P. An upper bound for the continuous case /spl phi/ is derived from their maximum eigenvalues; and and upper bound for the discrete case /spl xi/, is derived from their spectral radius. The results presented are for the general case of an interval matrix.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116227516","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510223
R. Stevenson
The compression of digital video data has many applications in the transmission and storage of video sequences. For moderate compression ratios there are many techniques which can provide satisfactory performance. For high compression ratios, however, typical compression techniques produce noticeable artifacts in the reconstructed video. This paper proposes a technique for the post-processing of motion-compensated compressed video data. The technique utilizes a stochastic regularization approach which can be realized using a simple and fast iterative computational algorithm. The approach has been applied to the post-processing of color video sequences and yields good results.
{"title":"Reduction of coding artifacts in low-bit-rate video coding","authors":"R. Stevenson","doi":"10.1109/MWSCAS.1995.510223","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510223","url":null,"abstract":"The compression of digital video data has many applications in the transmission and storage of video sequences. For moderate compression ratios there are many techniques which can provide satisfactory performance. For high compression ratios, however, typical compression techniques produce noticeable artifacts in the reconstructed video. This paper proposes a technique for the post-processing of motion-compensated compressed video data. The technique utilizes a stochastic regularization approach which can be realized using a simple and fast iterative computational algorithm. The approach has been applied to the post-processing of color video sequences and yields good results.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115242496","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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