Pub Date : 2003-07-10DOI: 10.1109/SCS.2003.1227068
R. Lotfi, M. Taherzadeh‐Sani, M. Azizi, O. Shoaei
Low-voltage low-power comparators implemented in standard digital processes are of increasing importance in different integrated applications. In this paper a 1-V fully-differential low-power MOSFET-only comparator with rail-to-rail input swing is presented which can be suitably used in very low-voltage low-power pipelined A/D converters. This comparator utilizes a resistive divider configuration with a MOSFET-only clock booster to supply a higher voltage for the dynamic latch in the intervals that a comparison is to be made. HSPICE simulations of the proposed comparator in a 0.25-μm CMOS process, confirm the rail-to-rail input range of the fully-differential comparator with a supply voltage of 1 V with a decision time of less than 1 ns while driving a capacitive load of 0.2pF. The worst-case dynamic power consumption of the proposed comparator is less than 100μW with a clock frequency of 50MHz.
{"title":"A 1-V MOSFET-only fully-differential dynamic comparator for use in low-voltage pipelined A/D converters","authors":"R. Lotfi, M. Taherzadeh‐Sani, M. Azizi, O. Shoaei","doi":"10.1109/SCS.2003.1227068","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227068","url":null,"abstract":"Low-voltage low-power comparators implemented in standard digital processes are of increasing importance in different integrated applications. In this paper a 1-V fully-differential low-power MOSFET-only comparator with rail-to-rail input swing is presented which can be suitably used in very low-voltage low-power pipelined A/D converters. This comparator utilizes a resistive divider configuration with a MOSFET-only clock booster to supply a higher voltage for the dynamic latch in the intervals that a comparison is to be made. HSPICE simulations of the proposed comparator in a 0.25-μm CMOS process, confirm the rail-to-rail input range of the fully-differential comparator with a supply voltage of 1 V with a decision time of less than 1 ns while driving a capacitive load of 0.2pF. The worst-case dynamic power consumption of the proposed comparator is less than 100μW with a clock frequency of 50MHz.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127643021","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 : 2003-07-10DOI: 10.1109/SCS.2003.1226982
E. David, P. Ungureanu, M. Ansorge, L. Goras
Gabor filters are widely used in various image processing and computer-vision applications. Being computationally intensive, analog implementation using Cellular Neural Networks (CNN) can be an attractive solution. In this communication is presented a method for CNN template design of Gabor like filters, based on Pade approximation of Gaussian filters. The errors of approximation are evaluated for various neighborhood radii.
{"title":"On the CNN template design for Gabor-type filters based on Pade approximation","authors":"E. David, P. Ungureanu, M. Ansorge, L. Goras","doi":"10.1109/SCS.2003.1226982","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226982","url":null,"abstract":"Gabor filters are widely used in various image processing and computer-vision applications. Being computationally intensive, analog implementation using Cellular Neural Networks (CNN) can be an attractive solution. In this communication is presented a method for CNN template design of Gabor like filters, based on Pade approximation of Gaussian filters. The errors of approximation are evaluated for various neighborhood radii.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129658042","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 : 2003-07-10DOI: 10.1109/SCS.2003.1226934
A. Dmitriev, M. Hasler, G. Kassian, A. Khilinsky
Chaotic synchronization is generally extremely sensitive to the presence of noise and other interference in the channel. Is this sensitivity a fundamental property of chaotic synchronization or is it related to the choice of synchronization method and can it be suppressed by a modification of the method? If the answer is positive, then what are the relationships between the properties of a dynamical system and the level of noise at which the suppression of this sensitivity is still possible? What are particular methods to achieve synchronization stable to the presence of noise? In this paper we present the analysis of this issue from the standpoint of information theory. From this viewpoint the fundamental reason for this sensitivity is the fact that the chaotic signal contains information which requires a certain minimal threshold signal-to-noise ratio for transmission. Only in this case high-quality synchronization is transmitted (coded) optimally. Otherwise the threshold level can be much higher.
{"title":"Noise-resistant chaotic synchronization of nonhyperbolic maps via information transmission","authors":"A. Dmitriev, M. Hasler, G. Kassian, A. Khilinsky","doi":"10.1109/SCS.2003.1226934","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226934","url":null,"abstract":"Chaotic synchronization is generally extremely sensitive to the presence of noise and other interference in the channel. Is this sensitivity a fundamental property of chaotic synchronization or is it related to the choice of synchronization method and can it be suppressed by a modification of the method? If the answer is positive, then what are the relationships between the properties of a dynamical system and the level of noise at which the suppression of this sensitivity is still possible? What are particular methods to achieve synchronization stable to the presence of noise? In this paper we present the analysis of this issue from the standpoint of information theory. From this viewpoint the fundamental reason for this sensitivity is the fact that the chaotic signal contains information which requires a certain minimal threshold signal-to-noise ratio for transmission. Only in this case high-quality synchronization is transmitted (coded) optimally. Otherwise the threshold level can be much higher.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127580570","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227083
S. P. Michanos, A. Tsakoumis, P. Fessas, S. Vladov, V. Mladenov
A new approach to short-term load forecasting (STLF) in power systems is described in this paper. The method uses a chaotic time series and artificial neural network. The paper describes chaos time series analysis of daily power system peak loads. Nonlinear mapping of deterministic chaos is identified by multilayer perceptron (MLP). Using embedding dimension and delay time, an attractor in pseudo phase plane and an ANN model trained by this attractor are constructed. The proposed approach is demonstrated by an example.
{"title":"Short-term load forecasting using a chaotic time series","authors":"S. P. Michanos, A. Tsakoumis, P. Fessas, S. Vladov, V. Mladenov","doi":"10.1109/SCS.2003.1227083","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227083","url":null,"abstract":"A new approach to short-term load forecasting (STLF) in power systems is described in this paper. The method uses a chaotic time series and artificial neural network. The paper describes chaos time series analysis of daily power system peak loads. Nonlinear mapping of deterministic chaos is identified by multilayer perceptron (MLP). Using embedding dimension and delay time, an attractor in pseudo phase plane and an ANN model trained by this attractor are constructed. The proposed approach is demonstrated by an example.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117155663","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227096
Valeriu Beiu, J. Quintana, M. J. Avedilo, Răzvan Andonie
This paper reviews differential implementations of threshold logic gates, detailing two classes of solutions: capacitive (switched capacitor and floating gate), and conductance/current.
本文回顾了阈值逻辑门的差分实现，详细介绍了两类解决方案:电容(开关电容和浮门)和电导/电流。
{"title":"Differential implementations of threshold logic gates","authors":"Valeriu Beiu, J. Quintana, M. J. Avedilo, Răzvan Andonie","doi":"10.1109/SCS.2003.1227096","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227096","url":null,"abstract":"This paper reviews differential implementations of threshold logic gates, detailing two classes of solutions: capacitive (switched capacitor and floating gate), and conductance/current.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124128952","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227100
C. Rus, C. Rusu
The aim of this work is to construct digital elevation models using different types of wavelets. For a clear representation of the surfaces we use real and smooth models. A compression ratio has been selected as measure of performances. Experimental results are also provided.
{"title":"Synthesis of 3D surfaces using the wavelet transform","authors":"C. Rus, C. Rusu","doi":"10.1109/SCS.2003.1227100","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227100","url":null,"abstract":"The aim of this work is to construct digital elevation models using different types of wavelets. For a clear representation of the surfaces we use real and smooth models. A compression ratio has been selected as measure of performances. Experimental results are also provided.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130989373","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 : 2003-07-10DOI: 10.1109/SCS.2003.1226962
I. Immoreev, A. A. Sudakov
A comparison of narrow-band (NB) and ultra-wideband (UWB) communication systems is presented. The requirements to standards on restrictions of a frequency band and radiated emission of UWB and NB systems are surveyed. The analysis of an electromagnetic compatibility (EMC) of NB and UWB systems is carried out. The example of parameters' calculation of UWB communication system, operating in the same frequency band as the NB systems, is given. The expediency of joint application of both systems is shown.
{"title":"Analysis of a joint action's opportunity of ultra-wideband and narrow-band communication systems in the same frequency band","authors":"I. Immoreev, A. A. Sudakov","doi":"10.1109/SCS.2003.1226962","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226962","url":null,"abstract":"A comparison of narrow-band (NB) and ultra-wideband (UWB) communication systems is presented. The requirements to standards on restrictions of a frequency band and radiated emission of UWB and NB systems are surveyed. The analysis of an electromagnetic compatibility (EMC) of NB and UWB systems is carried out. The example of parameters' calculation of UWB communication system, operating in the same frequency band as the NB systems, is given. The expediency of joint application of both systems is shown.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126772322","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227081
N. S. Dimitrachi, V. I. Nastas
An original method is examined for measuring the structures with distributed constants physically inaccessible to direct connection in the measured chain. This paper also explained the principles of the method and its mathematical bases and analyzed the errors and the possibilities.
{"title":"Circuits and methods for measurement the structures with distributed constants","authors":"N. S. Dimitrachi, V. I. Nastas","doi":"10.1109/SCS.2003.1227081","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227081","url":null,"abstract":"An original method is examined for measuring the structures with distributed constants physically inaccessible to direct connection in the measured chain. This paper also explained the principles of the method and its mathematical bases and analyzed the errors and the possibilities.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121682817","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227064
E. Zervakis, D. Loukas, N. Haralabidis, A. Pavlidis
A system for processing signals from direct photon conversion sensors has been developed with the aim to be used for applications in X-ray imaging. The system consists of a mixed analog-digital ASIC and a digital 32-channels binary counter ASIC. The digital chips can be daisy-chained. In this way a system with high number of readout channels can be constructed. A custom made PCI card is also developed in order to control the operation of the whole system. The system is intended to operate with CdTe sensors in a luggage inspection system. The first experimental results including overall noise and counting rate are reported here.
{"title":"A low noise-high counting rate readout system for X-ray imaging applications","authors":"E. Zervakis, D. Loukas, N. Haralabidis, A. Pavlidis","doi":"10.1109/SCS.2003.1227064","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227064","url":null,"abstract":"A system for processing signals from direct photon conversion sensors has been developed with the aim to be used for applications in X-ray imaging. The system consists of a mixed analog-digital ASIC and a digital 32-channels binary counter ASIC. The digital chips can be daisy-chained. In this way a system with high number of readout channels can be constructed. A custom made PCI card is also developed in order to control the operation of the whole system. The system is intended to operate with CdTe sensors in a luggage inspection system. The first experimental results including overall noise and counting rate are reported here.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114445006","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227065
H. Zare-Hoseini, M. Azizi, O. Shoaei
In this paper, a very area-efficient low-noise low-power correlated double sampled integrator has been presented. A fully differential class AB op-amp with preamplifier is designed with gain of 85dB, bandwidth of 12 Mrad/s and overall input referred noise floor of -171 dB. For attenuating the integrator's op-amp thermal noise, the input transconductance is kept as large as needed and also the bandwidth of the op-amp is decreased as much as possible without the need for large compensation capacitors as in the ordinary topologies are used. The integrator is used in the front-end of a 24 bit, fourth-order single-loop Delta-Sigma modulator for a bandwidth of 1000 Rad/s. The integrator power consumption is only 2.8 mW with a single 3.0V supply in 0.6-μm CMOS technology.
{"title":"An area-efficient low-power SC integrator for very high resolution ADCS","authors":"H. Zare-Hoseini, M. Azizi, O. Shoaei","doi":"10.1109/SCS.2003.1227065","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227065","url":null,"abstract":"In this paper, a very area-efficient low-noise low-power correlated double sampled integrator has been presented. A fully differential class AB op-amp with preamplifier is designed with gain of 85dB, bandwidth of 12 Mrad/s and overall input referred noise floor of -171 dB. For attenuating the integrator's op-amp thermal noise, the input transconductance is kept as large as needed and also the bandwidth of the op-amp is decreased as much as possible without the need for large compensation capacitors as in the ordinary topologies are used. The integrator is used in the front-end of a 24 bit, fourth-order single-loop Delta-Sigma modulator for a bandwidth of 1000 Rad/s. The integrator power consumption is only 2.8 mW with a single 3.0V supply in 0.6-μm CMOS technology.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124062203","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：