Pub Date : 2008-10-28DOI: 10.1109/IST.2008.4659954
D. Falie, V. Buzuloiu
One of the most important distance measurement errors is produced by light reflections. These errors can't be avoided and black are more affected than white objects. The measured distance by the ToF camera to an object in the scene changes if surrounding objects are moved. The distance error can be greater than 50% and camera calibration is useless if objects are moved. The calibration method we propose can be performed in any conditions not only in the laboratory. The distance errors for all objects in the scene can be corrected if on the objects are attached white or black tags/ labels. The ToF cameras can be improved using an active illumination with structured light. The improvement will eliminate the distance errors produced by light reflections.
{"title":"Distance errors correction for the time of flight (ToF) cameras","authors":"D. Falie, V. Buzuloiu","doi":"10.1109/IST.2008.4659954","DOIUrl":"https://doi.org/10.1109/IST.2008.4659954","url":null,"abstract":"One of the most important distance measurement errors is produced by light reflections. These errors can't be avoided and black are more affected than white objects. The measured distance by the ToF camera to an object in the scene changes if surrounding objects are moved. The distance error can be greater than 50% and camera calibration is useless if objects are moved. The calibration method we propose can be performed in any conditions not only in the laboratory. The distance errors for all objects in the scene can be corrected if on the objects are attached white or black tags/ labels. The ToF cameras can be improved using an active illumination with structured light. The improvement will eliminate the distance errors produced by light reflections.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116891518","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611683
A. Brambilla, G. S. Gajani
Floquent analysis has gained a large interest to compute small signal and noise effects is non-autonomous and autonomous circuits (oscillators). A reliable and straightforward method to compute all the eigenfunctions related to the Floquet analysis is here discussed. The method has been implemented in a circuit simulator and tested on several circuits. Numerical results are presented.
{"title":"Numerical computation of the Floquent eigenfunctions","authors":"A. Brambilla, G. S. Gajani","doi":"10.1109/ECCSC.2008.4611683","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611683","url":null,"abstract":"Floquent analysis has gained a large interest to compute small signal and noise effects is non-autonomous and autonomous circuits (oscillators). A reliable and straightforward method to compute all the eigenfunctions related to the Floquet analysis is here discussed. The method has been implemented in a circuit simulator and tested on several circuits. Numerical results are presented.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125362166","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611650
N. Prokopenko, S. Krutchinsky, A. Budyakov, J.M. Savchenko, N.V. Kovbasjuk
Compensation methods of substrate capacitance Cs and capacitance of transistor collector-base Ccb of analog devices are considered. The number of conditions with their influence on typical amplifier stages frequency characteristics can be decreased more than 5 divide 10 times are given.
{"title":"Compensation methods of basic transistors output capacitance components in analog integrated circuits","authors":"N. Prokopenko, S. Krutchinsky, A. Budyakov, J.M. Savchenko, N.V. Kovbasjuk","doi":"10.1109/ECCSC.2008.4611650","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611650","url":null,"abstract":"Compensation methods of substrate capacitance Cs and capacitance of transistor collector-base Ccb of analog devices are considered. The number of conditions with their influence on typical amplifier stages frequency characteristics can be decreased more than 5 divide 10 times are given.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130338811","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611652
E. V. Balashov, Alexander S. Korotkov
In this paper the new type of UWB LNA is presented. The amplifier has a novel feedback topology and load circuit that allows the designer to obtain high voltage gain and matching in the wide frequency range from 3.1 GHz to 10.6 GHz without cascading, current reuse technique and without an additional matching circuit. The key point of the amplifier is the source degeneration with resistive shunt series feedback and the load circuit based on combined parallel-series resonance circuit. The voltage gain of the amplifier is 11 dB, the matching is better than -10 dB, the noise figure lies between 3.2 and 4 dB in the whole frequency range. The value of CP1dB is -15 dB at the frequency near the amplitude response maximum 7.6 GHz. The amplifier consumes the power of 11.5 mW from the voltage supply 1.8 V. These characteristics are obtained by simulation of the amplifier using Virtuoso custom design platform, Cadence Design Systems, using 0.18 um CMOS parameters.
{"title":"Ultra wideband low noise amplifier with source degeneration and shunt series fedback","authors":"E. V. Balashov, Alexander S. Korotkov","doi":"10.1109/ECCSC.2008.4611652","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611652","url":null,"abstract":"In this paper the new type of UWB LNA is presented. The amplifier has a novel feedback topology and load circuit that allows the designer to obtain high voltage gain and matching in the wide frequency range from 3.1 GHz to 10.6 GHz without cascading, current reuse technique and without an additional matching circuit. The key point of the amplifier is the source degeneration with resistive shunt series feedback and the load circuit based on combined parallel-series resonance circuit. The voltage gain of the amplifier is 11 dB, the matching is better than -10 dB, the noise figure lies between 3.2 and 4 dB in the whole frequency range. The value of CP1dB is -15 dB at the frequency near the amplitude response maximum 7.6 GHz. The amplifier consumes the power of 11.5 mW from the voltage supply 1.8 V. These characteristics are obtained by simulation of the amplifier using Virtuoso custom design platform, Cadence Design Systems, using 0.18 um CMOS parameters.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114078049","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611670
A. Brambilla, G. Gruosso, G. S. Gajani, M. Redaelli
Radio frequency (RF) applications in consumer electronics require solid methods for the computation of the steady state behaviour in autonomous and non autonomous circuits. The shooting method (SH) is possibly the most important steady state time domain numerical method currently employed in circuit simulation. We show that SH requires great care in the choice and use of matrix factorization methods. In particular, the advantages of QR over the more standard and widely employed LU method are shown.
{"title":"QR factorisation in the shooting method","authors":"A. Brambilla, G. Gruosso, G. S. Gajani, M. Redaelli","doi":"10.1109/ECCSC.2008.4611670","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611670","url":null,"abstract":"Radio frequency (RF) applications in consumer electronics require solid methods for the computation of the steady state behaviour in autonomous and non autonomous circuits. The shooting method (SH) is possibly the most important steady state time domain numerical method currently employed in circuit simulation. We show that SH requires great care in the choice and use of matrix factorization methods. In particular, the advantages of QR over the more standard and widely employed LU method are shown.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127634366","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611672
M. Maricaru, F. Constantinescu, M. Nitescu, A. Florea
A linear electromechanical field model of an AlN piezoelectric resonator is developed in this paper. The values of the material parameters on the longitudinal direction have been validated by comparing the FEM results with the Mason multilayer model results and with small signal measurements. Various models for FEM analysis including transversal wave propagations are considered.
{"title":"Field models of power BAW resonators","authors":"M. Maricaru, F. Constantinescu, M. Nitescu, A. Florea","doi":"10.1109/ECCSC.2008.4611672","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611672","url":null,"abstract":"A linear electromechanical field model of an AlN piezoelectric resonator is developed in this paper. The values of the material parameters on the longitudinal direction have been validated by comparing the FEM results with the Mason multilayer model results and with small signal measurements. Various models for FEM analysis including transversal wave propagations are considered.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132598797","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611646
S. Birca-Galateanu
Comparison of class E low dv/dt and low di/dt inverters and rectifiers, which may help in circuit choice. Analytical relationships have been derived for the normalized load resistance and other circuit parameters as functions of the transistor/diode conduction duty factor. The optimum operating frequencies, the domains of parameter values and the function of different components are emphasized.
{"title":"Class E inverters and rectifiers","authors":"S. Birca-Galateanu","doi":"10.1109/ECCSC.2008.4611646","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611646","url":null,"abstract":"Comparison of class E low dv/dt and low di/dt inverters and rectifiers, which may help in circuit choice. Analytical relationships have been derived for the normalized load resistance and other circuit parameters as functions of the transistor/diode conduction duty factor. The optimum operating frequencies, the domains of parameter values and the function of different components are emphasized.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127865459","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611664
E. M. Savchenko, A. Budyakov, N. Prokopenko
A high-speed operational amplifier (OA) topology with generalized current feedback is proposed. Such OA allow keeping of all advantages of voltage feedback OA and provide constant bandwidth when closed loop gain is changed.
{"title":"Generalized current feedback operational amplifier","authors":"E. M. Savchenko, A. Budyakov, N. Prokopenko","doi":"10.1109/ECCSC.2008.4611664","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611664","url":null,"abstract":"A high-speed operational amplifier (OA) topology with generalized current feedback is proposed. Such OA allow keeping of all advantages of voltage feedback OA and provide constant bandwidth when closed loop gain is changed.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134636649","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611668
G. Nenov
The graph theory is wide used tool in network analysis and synthesis because it permits some useful visualization of the relationships between the network variables - currents and voltages (Seshu and Reed, 1961 and Lee, 1965). The spanning tree is one of the most important concepts in this theory - it applies to oriented as well as for nonoriented graphs. The choice of the corresponding spanning tree determines the equation system in circuit analysis. In the paper presented an attempt is made to generalize the concept of network oriented graph complementary spanning trees. The obtained results can be useful for the network analysis.
{"title":"A generalization of network graph complementary spanning trees","authors":"G. Nenov","doi":"10.1109/ECCSC.2008.4611668","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611668","url":null,"abstract":"The graph theory is wide used tool in network analysis and synthesis because it permits some useful visualization of the relationships between the network variables - currents and voltages (Seshu and Reed, 1961 and Lee, 1965). The spanning tree is one of the most important concepts in this theory - it applies to oriented as well as for nonoriented graphs. The choice of the corresponding spanning tree determines the equation system in circuit analysis. In the paper presented an attempt is made to generalize the concept of network oriented graph complementary spanning trees. The obtained results can be useful for the network analysis.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120846686","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 : 2008-07-10DOI: 10.1109/ECCSC.2008.4611653
M. Ben Amor, M. Loulou, S. Quintanel, D. Pasquet
In this paper we present the design of a low noise amplifier for WiMAX (802.16 a) standard with AMS 0.35 mum CMOS process. This LNA is designed to cover the frequency range for licensed and unlicensed bands of the WiMAX 2.3 GHz-5.9 GHz. The proposed amplifier achieve a wide band input and output matching with S11 and S22 lower than -10 dB, a flat gain of 13 db and a noise figure between 3dB for all the band and from the upper to the higher frequencies. The presented wide band LNA employs a Chebychev filter for input matching and an inductive shunt feedback for output matching with a bias current of 25 mA and a supply voltage of 2.5 V.
{"title":"A wideband CMOS LNA design for WiMAX applications","authors":"M. Ben Amor, M. Loulou, S. Quintanel, D. Pasquet","doi":"10.1109/ECCSC.2008.4611653","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611653","url":null,"abstract":"In this paper we present the design of a low noise amplifier for WiMAX (802.16 a) standard with AMS 0.35 mum CMOS process. This LNA is designed to cover the frequency range for licensed and unlicensed bands of the WiMAX 2.3 GHz-5.9 GHz. The proposed amplifier achieve a wide band input and output matching with S11 and S22 lower than -10 dB, a flat gain of 13 db and a noise figure between 3dB for all the band and from the upper to the higher frequencies. The presented wide band LNA employs a Chebychev filter for input matching and an inductive shunt feedback for output matching with a bias current of 25 mA and a supply voltage of 2.5 V.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132675504","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：