Pub Date : 2003-07-10DOI: 10.1109/SCS.2003.1227109
V. Groza, B. Noory
Steady FPGA density and speed improvement in recent years has paved the path for realization of larger Neural Networks On a Programmable Chip (NNOPC), a high performance and low cost alternative to traditional physical implementations of artificial neural networks. In this paper, we propose a parametric approach for mapping artificial neural networks onto FPGA structures, as well as an optimization method to reduce area requirements of the synthesized hardware. Applying this method to a sample neuron, we achieved a 30% reduction in hardware resource requirements of the synaptic multiplier.
{"title":"Parametric mapping of neural networks to fine-grained FPGAs","authors":"V. Groza, B. Noory","doi":"10.1109/SCS.2003.1227109","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227109","url":null,"abstract":"Steady FPGA density and speed improvement in recent years has paved the path for realization of larger Neural Networks On a Programmable Chip (NNOPC), a high performance and low cost alternative to traditional physical implementations of artificial neural networks. In this paper, we propose a parametric approach for mapping artificial neural networks onto FPGA structures, as well as an optimization method to reduce area requirements of the synthesized hardware. Applying this method to a sample neuron, we achieved a 30% reduction in hardware resource requirements of the synaptic multiplier.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"10 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":"129413982","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.2003.1227139
M. V. Nemescu, D. Lucache, D. Ioachim
The paper purpose is to present the existence and appearance of the slow oscillations, based on resonant jumps, in circuits or systems described by Duffing-type equation having a nonlinearity coefficient with inertial variation. The conditions necessary for jump producing and for slow oscillations appearance are emphasized. The theoretical approach is confirmed by numerical simulation.
{"title":"Slow oscillations in circuits and nonlinear systems described by Duffing equation","authors":"M. V. Nemescu, D. Lucache, D. Ioachim","doi":"10.1109/SCS.2003.1227139","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227139","url":null,"abstract":"The paper purpose is to present the existence and appearance of the slow oscillations, based on resonant jumps, in circuits or systems described by Duffing-type equation having a nonlinearity coefficient with inertial variation. The conditions necessary for jump producing and for slow oscillations appearance are emphasized. The theoretical approach is confirmed by numerical simulation.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"59 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":"130306391","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.2003.1226956
S. Birca-Galateanu
A switching voltage regulator must show high efficiency, good regulation, low output-voltage ripple, and also stability and fast transient response. The use of additional feedback signal(s) from the inductance currents and capacitor voltages keeps the overall phase shift of the control-to-composite-feedback transfer function lower than -π/2. The error amplifier can be built to add only -π/2 phase shift and thus the switching power supply becomes unconditionally stable can have much faster transient response than single-feedback regulator. Another key condition for the stability of double dc-dc converters is the first-section LC-circuit damping.
{"title":"Multiple-loop control of DC-DC converters","authors":"S. Birca-Galateanu","doi":"10.1109/SCS.2003.1226956","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226956","url":null,"abstract":"A switching voltage regulator must show high efficiency, good regulation, low output-voltage ripple, and also stability and fast transient response. The use of additional feedback signal(s) from the inductance currents and capacitor voltages keeps the overall phase shift of the control-to-composite-feedback transfer function lower than -π/2. The error amplifier can be built to add only -π/2 phase shift and thus the switching power supply becomes unconditionally stable can have much faster transient response than single-feedback regulator. Another key condition for the stability of double dc-dc converters is the first-section LC-circuit damping.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"2 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":"124514482","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.2003.1226998
L. Fanucci, A. Giambastiani, C. Rosadini
This paper presents the verification process performed during the development of an automotive platform suited to interface a generic sensor. The platform aims to reduce the cost of the analog circuitry needed to interface the sensor, by massive usage of digital electronic, and by addressing a wide class of automotive applications based on sensor signal elaboration. Particularly, all the verification steps from identification of the right level of abstraction and hierarchy, platform hardware-software co-simulation and prototype hardware emulation are described.
{"title":"VLSI design and verification methodologies for automotive embedded systems","authors":"L. Fanucci, A. Giambastiani, C. Rosadini","doi":"10.1109/SCS.2003.1226998","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226998","url":null,"abstract":"This paper presents the verification process performed during the development of an automotive platform suited to interface a generic sensor. The platform aims to reduce the cost of the analog circuitry needed to interface the sensor, by massive usage of digital electronic, and by addressing a wide class of automotive applications based on sensor signal elaboration. Particularly, all the verification steps from identification of the right level of abstraction and hierarchy, platform hardware-software co-simulation and prototype hardware emulation are described.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"70 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":"126780673","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.2003.1227071
M. B. Abdelhalim, A. Salama
3D-DCT technique is used in video system to eliminate the need for motion vectors computations in the encoder or motion compensation computations in the decoder. This paper focuses on the hardware implementation of the video encoder/decoder system design. A complete design of the quantizer and VLC in the encoder side, as well as design of dequantizer and VLD in the decoder side is implemented to complete the system. Finally the system is targeted on one of the well-known Field Programmable Gate Arrays (FPGAs) provided by ALTERA Corp. and simulated using sample inputs.
{"title":"Implementation of 3D-DCT based video encoder/decoder system","authors":"M. B. Abdelhalim, A. Salama","doi":"10.1109/SCS.2003.1227071","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227071","url":null,"abstract":"3D-DCT technique is used in video system to eliminate the need for motion vectors computations in the encoder or motion compensation computations in the decoder. This paper focuses on the hardware implementation of the video encoder/decoder system design. A complete design of the quantizer and VLC in the encoder side, as well as design of dequantizer and VLD in the decoder side is implemented to complete the system. Finally the system is targeted on one of the well-known Field Programmable Gate Arrays (FPGAs) provided by ALTERA Corp. and simulated using sample inputs.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"136 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":"114466556","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.2003.1227119
M. Azizi, A. Saeedfar, H. Hoseini, O. Shoaei
Analysis of thermal noise in switched-capacitor multi-bit gain-stages used in low-voltage high-resolution pipeline analog-to-digital converters is presented. The analytical expression obtained for the input referred noise power, which should be considered in the design procedure, is general for any number of bits being resolved and shows that the noise power is decreased when more bits are resolved in the stage.
{"title":"Thermal noise analysis of multi-bit SC gain-stages for low-voltage high-resolution pipeline ADC design","authors":"M. Azizi, A. Saeedfar, H. Hoseini, O. Shoaei","doi":"10.1109/SCS.2003.1227119","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227119","url":null,"abstract":"Analysis of thermal noise in switched-capacitor multi-bit gain-stages used in low-voltage high-resolution pipeline analog-to-digital converters is presented. The analytical expression obtained for the input referred noise power, which should be considered in the design procedure, is general for any number of bits being resolved and shows that the noise power is decreased when more bits are resolved in the stage.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"77 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":"122856566","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.2003.1226993
D. Cepareanu, N. Lucanu, I. Pletea
This paper presents the analyzing of a lower sideband up converter, made in the microstrip technology, for which the input signals have the frequency range 2.3 GHz and the output signals have the frequency range 22 GHz.
{"title":"Lower sideband up converter with varactor diode","authors":"D. Cepareanu, N. Lucanu, I. Pletea","doi":"10.1109/SCS.2003.1226993","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226993","url":null,"abstract":"This paper presents the analyzing of a lower sideband up converter, made in the microstrip technology, for which the input signals have the frequency range 2.3 GHz and the output signals have the frequency range 22 GHz.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"173 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":"116358465","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.2003.1227105
I. Bogdan, C. Comsa
Smart antennas are considered vital components of the future 3G mobile communication networks based on www.symena.com, G.V. Tsoulos et al. (2000), and P. Gendren (2002). The topic is very broad in nature and includes adaptation algorithms according to Y.S. Song et al. (2001) and C. Paleologu et al. (2002), receiver architecture, channel modeling and estimation, adaptive coding, antenna theory by H.S. Cho et al. (2001), A. Sabharwal et al. (2000) and M.L. Leou et al. (2000) etc. This paper is a study of circular array applications as smart antennas intended to evaluate the advantages and the drawbacks and to establish guidelines to design its parameters. A classification of smart antennas is also included.
{"title":"Analysis of circular arrays as smart antennas for cellular networks","authors":"I. Bogdan, C. Comsa","doi":"10.1109/SCS.2003.1227105","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227105","url":null,"abstract":"Smart antennas are considered vital components of the future 3G mobile communication networks based on www.symena.com, G.V. Tsoulos et al. (2000), and P. Gendren (2002). The topic is very broad in nature and includes adaptation algorithms according to Y.S. Song et al. (2001) and C. Paleologu et al. (2002), receiver architecture, channel modeling and estimation, adaptive coding, antenna theory by H.S. Cho et al. (2001), A. Sabharwal et al. (2000) and M.L. Leou et al. (2000) etc. This paper is a study of circular array applications as smart antennas intended to evaluate the advantages and the drawbacks and to establish guidelines to design its parameters. A classification of smart antennas is also included.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"68 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":"114590073","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.2003.1227012
H. Ebrahimirad, S. Vaez‐Zadeh, M. Jalili-Kharaajoo
In this paper, a sliding mode controller is applied to a permanent magnet synchronous motor. A semi-linearized model is introduced for quick speed controller design and evaluation. Finally, the proposed control action is compared with that of a PI controller. Simulation results reveal the effectiveness of the proposed sliding mode controller.
{"title":"Robust sliding mode control applied to speed control of PM synchronous motors","authors":"H. Ebrahimirad, S. Vaez‐Zadeh, M. Jalili-Kharaajoo","doi":"10.1109/SCS.2003.1227012","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227012","url":null,"abstract":"In this paper, a sliding mode controller is applied to a permanent magnet synchronous motor. A semi-linearized model is introduced for quick speed controller design and evaluation. Finally, the proposed control action is compared with that of a PI controller. Simulation results reveal the effectiveness of the proposed sliding mode controller.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"49 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":"114909163","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.2003.1227095
M. Siripruchyanun, P. Wardkein, Sunee Kurutuch
This article presents a novel approach to implement PWM signal generator using CMOS transconductors, its scheme comprises CMOS Schmitt trigger and voltage to current converter. It can originate PWM signal over a wide frequency range arising from differentiation of modulating input signal in the provided time. The outstanding feature of the proposed scheme is that the PWM output has frequency-constant, which does not depend on amplitude of the modulating signal. This makes it suitable to use in application of adjacent frequency between carrier and modulating signal, which differs from the conventional PWM signal generators. The proposed circuit has relatively simpler scheme. It consists of exclusively 12 MOS transistors, 3 current sources, 1 capacitor and 2 resistors, thus it is suitable for further fabrication through CMOS technology. Furthermore, its frequency and amplitude of PWM output signal can be independently adjusted by electronic method. The SPICE simulation results are shown, which are in correspondence to theoretical anticipation.
{"title":"An integrable CMOS transconductors-based differentiated input/frequency-constant PWM signal generator","authors":"M. Siripruchyanun, P. Wardkein, Sunee Kurutuch","doi":"10.1109/SCS.2003.1227095","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227095","url":null,"abstract":"This article presents a novel approach to implement PWM signal generator using CMOS transconductors, its scheme comprises CMOS Schmitt trigger and voltage to current converter. It can originate PWM signal over a wide frequency range arising from differentiation of modulating input signal in the provided time. The outstanding feature of the proposed scheme is that the PWM output has frequency-constant, which does not depend on amplitude of the modulating signal. This makes it suitable to use in application of adjacent frequency between carrier and modulating signal, which differs from the conventional PWM signal generators. The proposed circuit has relatively simpler scheme. It consists of exclusively 12 MOS transistors, 3 current sources, 1 capacitor and 2 resistors, thus it is suitable for further fabrication through CMOS technology. Furthermore, its frequency and amplitude of PWM output signal can be independently adjusted by electronic method. The SPICE simulation results are shown, which are in correspondence to theoretical anticipation.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"41 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":"122023648","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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