Dissertations / Theses on the topic 'UNIVERSAL FILTERs'
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Smith, George. "Refining queries on a treebank with XSLT filters : approaching the universal quantifier." Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2006/867/.
Full textThe discussion is within the context of the TIGER treebank, the associated search engine and query language, but the general ideas can apply to any search engine for XML-encoded treebanks.
It will be shown that important classes of linguistic phenomena can be accessed by applying relatively simple XSLT templates to the output of a query, effectively simulating the universal quantifier for a subset of the query language. uni-potsdam.de/cgi-bin/publika/view.pl?id=206">
Shadrin, Aleksandr. "Analogové pole pro realizaci programovatelného filtru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221026.
Full textMelo, Priscila Facco de. "Projeto e implementação de um filtro ativo universal trifásico controlado digitalmente." Universidade Tecnológica Federal do Paraná, 2010. http://repositorio.utfpr.edu.br/jspui/handle/1/900.
Full textThis paper presents the development and implementation of a three-phase universal active filter consisting of three single-phase modules. Each single-phase module is independent and is controlled by a digital signal processor. The power structure used in each module is a three-arm topology in which two converts share one arm, so that the circuit has a reduced count of components and can operate without using a transformer. The proposed active filter can compensate harmonic distortion and adjust the voltage level delivered to the load. It also compensates the load current connected to the filter output, correcting its harmonic content and power factor. It presents a literature review on some issues related to power quality, as the concepts of harmonic distortion, its effects and relevant standards. Then the principal topologies used in active filters are presented. Three single-phase modules, each one of 1500 W, are implemented and the operation principles of the three-arms structure and the main parameters of the power circuit are analyzed. A digital PLL (Phase Locked Loop) is employed to synchronize each module. Repetitive controllers are used to control the voltage and current. Details of the control strategy and circuit design of the synchronism and digital controllers are presented. The results are verified through simulation and experimentation of the implemented prototype. Using the active filter was possible to reduce the harmonic content of the loads used in the experimental tests as well as increasing the power factor and to correct the distortion and voltage level supplied to the load.
Larsson, Mats. "Development of a Digital Universal Filter Bank." Thesis, Uppsala universitet, Signaler och System, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-307929.
Full textSyring, Felicia Maria [Verfasser]. "The future of sunscreen efficacy evaluation : a comparative study of universal sun protection factor, radical formation ratio and sun protection factor assessing the protective value of sunscreen formulations containing chemical-, and/or physical filters as well as antioxidant additives / Felicia Maria Syring." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2015. http://d-nb.info/1067441972/34.
Full textFröhlich, Lubomír. "Aktivní kmitočtové filtry pro vyšší frekvence." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233616.
Full textSalášek, Jan. "Analogové funkční bloky fraktálního řádu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-241141.
Full textPrát, Marek. "Návrh elektronicky rekonfigurovatelných filtračních struktur s moderními aktivními prvky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377113.
Full textJu, Ziyang [Verfasser]. "A Filter Bank Based Reconfigurable Receiver Architecture for Universal Wireless Communications / Ziyang Ju." Kassel : Kassel University Press, 2010. http://d-nb.info/1016850379/34.
Full textGajdoš, Adam. "Elektronicky rekonfigurovatelné kmitočtové filtry." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-241983.
Full textHackel, Philipp Marius. "Katalytische Umsetzung von Rauchgaskomponenten in imprägnierten kornkeramischen Filterelementen experimentelle und rechnerische Modelluntersuchungen /." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://www.uvka.de/univerlag/volltexte/2007/240/.
Full textHinot, Karelle. "Catalytic soot oxidation by platinum on sintered metal filters influence of the platinum quantity, particle size and location, and investigation of the platinum soot contact /." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://www.uvka.de/univerlag/volltexte/2007/201/.
Full textHinot, Karelle. "Catalytic soot oxidation by platinum on sintered metal filters influence of the platinum quantity, particle size and location, and investigation of the platinum soot contact." Karlsruhe Univ.-Verl. Karlsruhe, 2006. http://www.uvka.de/univerlag/volltexte/2007/201/.
Full textMinarčík, Martin. "Návrh koncepce napěťového konvejoru a jeho aplikační možnosti." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233471.
Full textNovotný, Matouš. "Filtry vyšších řádů s proudovými zrcadly." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218224.
Full textJeřábek, Jan. "Kmitočtové filtry s proudovými aktivními prvky." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-233528.
Full textCittolin, Angelo. "Etude de filtres universels en vue d'une détermination et d'une sélection automatique de gammes d'assemblage de produits industriels /." [S.l.] : [s.n.], 1997. http://library.epfl.ch/theses/?nr=1719.
Full textŽůrek, Radomil. "Využití grafů signálových toků k návrhu diferenčních filtrů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218355.
Full textKhatib, Nabhan. "Obvody pro analogové zpracování signálů na bázi nekonvenčních aktivních prvků." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233586.
Full textShaktour, Mahmoud. "Nekonvenční obvodové prvky pro návrh příčkových filtrů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-233531.
Full textStejný, Jiří. "Návrh řiditelných kmitočtových filtrů s moderními proudovými prvky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218116.
Full textPánek, David. "Syntéza diferenčních filtračních struktur se složenými aktivními prvky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-399604.
Full textHerencsár, Norbert. "Nové aktivní funkční bloky a jejich aplikace v kmitočtových filtrech a kvadraturních oscilátorech." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-233510.
Full textMichalička, Filip. "Syntéza elektronicky rekonfigurovatelných kmitočtových filtrů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413078.
Full textHeidari, Leila. "Calage d'historiques de réservoirs pétroliers par le filtre de Kalman d'ensemble et des méthodes de paramétrisation." Phd thesis, École Nationale Supérieure des Mines de Paris, 2011. http://pastel.archives-ouvertes.fr/pastel-00581082.
Full textBirrien, Florent. "Assimilation de données et inversion bathymétrique pour la modélisation de l'évolution des plages sableuses." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00870775.
Full textGoyal, Sachin. "Power network in the loop : subsystem testing using a switching amplifier." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/26521/1/Sachin_Goyal_Thesis.pdf.
Full textGoyal, Sachin. "Power network in the loop : subsystem testing using a switching amplifier." Queensland University of Technology, 2009. http://eprints.qut.edu.au/26521/.
Full textBetoule, Marc. "Analyse des données du fond diffus cosmologique : simulation et séparation de composantes." Phd thesis, Observatoire de Paris, 2009. http://tel.archives-ouvertes.fr/tel-00462157.
Full textFischer, Claude. "Les états initiaux pour la prévision numérique en météorologie: incertitude des données et méthode de correction." Habilitation à diriger des recherches, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00518946.
Full textMorilla, Cabello David. "Vision Based Control for Industrial Robots : Research and implementation." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-17583.
Full textRondi, Sylvain. "CALAS, une caméra pour l'étude des grandes échelles de la surface solaire." Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00144722.
Full textNous avons conçu une chaîne d'acquisition complète, comprenant la caméra et son électronique de commande, une électronique de lecture couplée à un logiciel de prise de vues, et un système de stockage des données.
Le projet a également consisté à concevoir un banc optique sur deux voies permettant l'observation de la surface solaire en mode imagerie mais aussi en mode Doppler et magnétographie, par l'utilisation d'un filtre magnéto-optique. Le travail a également nécessité d'étudier l'intégration de CALAS au sein de la Lunette Jean Rösch, en participant à la jouvence de cet instrument.
Enfin, au cours de ce projet, outre de nombreuses missions d'observation à la Lunette Jean Rösch, j'ai également été amené à participer à une campagne internationale d'observations coordonnées consacrée à l'étude des mouvements de la photosphère dans l'environnement de filaments. A l'issue de cette thèse, les premières observations à grand champ et haute résolution de la photosphère solaire ont été réalisées à la LJR, et leur excellente qualité se révèle déjà tout à fait prometteuse pour la suite de l'exploitation scientifique.
Duchez, Aurélie. "Contrôle du courant Nord Méditerranéen dans le golfe du Lion : une approche par simulation du système d'observation." Phd thesis, Université de Toulon et du Var, 2011. http://tel.archives-ouvertes.fr/tel-00627365/en/.
Full textTandeo, Pierre. "MODÉLISATION SPATIO-TEMPORELLE D'UNE VARIABLE QUANTITATIVE À PARTIR DE DONNÉES MULTI-SOURCES APPLICATION À LA TEMPÉRATURE DE SURFACE DES OCÉANS." Phd thesis, Agrocampus - Ecole nationale supérieure d'agronomie de rennes, 2010. http://tel.archives-ouvertes.fr/tel-00582679.
Full textDoerenbecher, Alexis. "Etude de l'optimisation d'un système d'observation adaptatif pour l'amélioration de la prévision des dépressions météorologiques." Phd thesis, Université Paul Sabatier - Toulouse III, 2002. http://tel.archives-ouvertes.fr/tel-00266577.
Full textLes zones sensibles de FASTEX, calculées avec les techniques issues des modèles linéaire et adjoint d'un modèle de prévision numérique, prennent en compte les propriétés dynamiques de l'atmosphère.
Cependant, l'efficacité du ciblage dépend beaucoup du système d'assimilation des données utilisé. Afin de reformuler une technique de ciblage utilisant le modèle adjoint, on a développé une approche dite de sensibilité aux observations. Ce calcul linéaire tient compte des caractéristiques de toutes les observations en présence et de la façon dont elles vont être assimilées. La formulation de la sensibilité d'un aspect de la prévision aux observations est basée sur le calcul de l'adjoint de l'opérateur d'assimilation auquel est combiné un calcul avec l'adjoint de la prévision. Cette technique a été développée dans un cadre quasi opérationnel avec l'algorithme 3D-Var d'ARPEGE.
La sensibilité aux observations permet, dans un contexte diagnostique, d'étudier de façon critique les déploiements d'observations adaptatives effectués durant la campagne FASTEX. Sur l'exemple de la POI17, l'étude de l'interaction des différents types d'observations qui interviennent dans l'assimilation (données conventionnelles et données ciblées) met en évidence des mécanismes complexes. Ces résultats éclairent le fonctionnement de l'impact des observations ciblées dans le système d'assimilation-prévision, ainsi que l'importance des valeurs observées pour l'impact final d'un jeu d'observations, qui explique l'effet parfois décevant de certains vols de FASTEX.
L'adjoint du système d'assimilation permet aussi de détecter des utilisations non optimales des observations ciblées dans le système 3D-Var. Le cas de la POI18 sert d'illustration pour une telle mise en £uvre de l'outil de la sensibilité aux observations. Cet outil révèle entre autres, la rusticité de la formulation des statistiques d'erreur de l'ébauche et d'observation modélisées pour ces données.
Ces résultats ont permis de proposer une nouvelle approche du ciblage dans un cadre pronostique. Cette approche est basée sur une simulation de la réduction de la variance d'erreur de prévision dans une direction instable. Cette technique prend en compte à la fois la dynamique de l'atmosphère, le système d'assimilation et les erreurs dans les conditions initiales (au sens statistique). Cette étude tend à définir une approche optimale du ciblage au sens où celui-ci maximise l'efficacité des observations additionnelles utilisées sous des contraintes pré-définies. Même si la vaste question de l'optimisation du ciblage reste trop ardue avec les outils d'investigation actuels, différentes techniques sub-optimales ont été proposées.
On a ainsi défini différentes stratégies de sélection de déploiements alternatifs qui ont été testées sur des situations de FASTEX. On montre ainsi la faisabilité de ces approches qui ouvrent la voie vers une formulation de techniques de ciblage plus optimales.
Berthet, Lionel. "Prévision des crues au pas de temps horaire : pour une meilleure assimilation de l'information de débit dans un modèle hydrologique." Phd thesis, AgroParisTech, 2010. http://pastel.archives-ouvertes.fr/pastel-00529652.
Full textSINGH, GOPAL. "REALIZATION OF FRACTIONAL ORDER ANALOG UNIVERSAL FILTERs." Thesis, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18025.
Full textWeng, Ro-Min, and 翁若敏. "The Design of New Current-Mode Universal Filters." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/39434726305660263492.
Full text國立臺灣大學
電機工程學研究所
87
This dissertation focuses on the design of universal biquadratic filters using current-mode amplifiers such as current conveyors (CCs), current followers (CFs) and current-feedback amplifiers (CFAs). The proposed current-mode universal filters are based on circuit structures with single-input terminal and three-output terminals (SITO). On the other hand, the proposed voltage-mode universal filters are based on circuit structures with three-input terminals and single-output terminal (TISO). The presented configurations provide the following advantages: (i) The highpass, bandpass, lowpass, notch and allpass filtering functions can be realized without changing circuit topology and elements. (ii) The active and passive sensitivities of the new filters are extremely low and are independent of quality factors. (iii) There are no component-matching conditions needed for the new universal filters. The main aim of this thesis would be less number of active and passive elements required for the new universal filters. To minimize the number of active elements as well as passive elements will significantly reduce the chip area of the integrated circuits. In addition, the passive elements, resistors and capacitors, are chosen to be grounded in order to fabricate the integrated circuits. PSPICE Simulation and experimental results that confirm the theoretical analysis are obtained for the proposed universal filters.
LIN, TAI-JUNG, and 林岱融. "Design of DDCCTA-Based Voltage-Mode Universal Biquadratic Filters." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/y25w9t.
Full text明志科技大學
電子工程系碩士班
105
Analogue filters are crucial circuit blocks in analogue signal processing, and various active components have been proposed in their implementation. The potential applications and advantages of realizing voltage-mode biquadratic filters by using differential difference current conveyor transconductance amplifiers (DDCCTAs) have received considerable attention. DDCCTA has a transconductance stage at its back-end and hence it can tune the circuit parameters electronically. In this thesis, three DDCCTA-based voltage-mode universal biquadratic filters are proposed. The first proposed DDCCTA-based voltage-mode universal biquadratic filter uses two DDCCTAs, two grounded capacitors and two resistors with single input and five outputs. The circuit has the advantage of high-input impedance terminal, the simultaneous realization of lowpass, bandpass, highpass, bandreject and allpass filtering responses from the same topology, the use of only grounded capacitors attractive for integration and absorbing shunt parasitic capacitance, and low passive sensitivity performance. The second proposed DDCCTA-based voltage-mode universal biquadratic filter uses one DDCCTA, two grounded capacitors and two resistors. The proposed configuration can be used as either a high-input impedance single-input four-output multifunction filter or three-input four-output universal filter. The circuit permits orthogonal controllability of the quality factor and resonance angular frequency and enjoys low active and passive sensitivity performances. The third proposed DDCCTA-based voltage-mode universal biquadratic filter uses one DDCCTA, two grounded capacitors and three resistors. The circuit simultaneously provides voltage-mode lowpass, bandpass, highpass, bandreject and allpass filtering responses, permits orthogonal controllability of the quality factor and resonance angular frequency, and still enjoys low active and passive sensitivity performances. Finally, we use simulation results demonstrate the effectiveness of the proposed filters scheme and the experimental results with TSMC 0.18µm 1P6M process technology are used to confirm the last of two proposed circuit. The simulation and experimental results agree well with the theoretical anticipation.
Chian, Chih Chan, and 簡志展. "Design of universal current-mode filters using current conveyors." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/63842941243932953196.
Full text中原大學
電機工程研究所
81
The current-mode circuits have the advantages of higher signal bandwidths,greater linearity,larger dynamic range and lower power dissipation.So the current-mode circuits have been received considerable attentation.In this paper,we propose four universal current-mode filters with 1) three inputs and one output, 2) single input and single output, 3) one input and three outputs and 4) a single current conveyor.The 1) , 2) and 3) offer a number of advantages, which are 1.wide bandwidth, 2.ω。and Q have low passive sensitivities, 3.obtain HP,LP,BP, Notch and AP transfer function from the presented circuits, 4.ω 。and Q are independently ( or orthogonally ) adjustable, 5.high output impedance, 6.the use of grounded passive elements, 7.suitable for Nth-order filters. The 4) gives the advantages of above 1. , 2. and 3. in additation to ω。and ω 。/ Q to be orthogonally adjustable. The PSPICE simulation results are very close to the theoretic values. Moreover,we present a method for transfering the circuits from current mode to transimpedance mode, transadmittance mode and voltage mode.
Liao, Yi-Zhen, and 廖宜楨. "Study of VLSI Architecture Design for Analog Universal Biquad Filters." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/pz4vu6.
Full text國立臺北科技大學
電腦與通訊研究所
98
In this dissertation, active elements such as Differential Difference Current Conveyor (DDCC), Operational Transconductance Amplifier (OTA), and Fully Differential Second-generator Current Conveyor (FDCCII) are used to design five kinds of biquad filter. First, a voltage-mode (VM) circuit is designed by using three DDCCs, three OTAs and two capacitors. It can realize low-pass, high-pass, band-pass, band-reject and all-pass filters simultaneously. The operating frequency can be up to 500 KHz with power consumption of 23.69mW. The chip area of the analog filter is 0.916mm2. For the second design, the high input impedance voltage-mode biquad filter is presented, which employs one DDCC, two OTAs and two grounded capacitors. It can realize three kinds of filter response including low-pass, high-pass and band-pass filters from the same configuration. The power consumption is 83mW and the chip area is 0.822mm2. Both of the biquad filters have the same advantages such as low sensitivity, no requirements for component matching conditions, no floating effects and any resistors, also the operating frequency can be adjusted easily. The third filter design employs two DDCCs, two resistors and two capacitors. It can realize low-pass, high-pass, positive band-pass and negative band-pass filters simultaneously. The power dissipation is 229.7μW and the chip area is 0.79mm2. Besides having advantages of low sensitivity and no matching conditions, this design has further advantages such as having no floating effects and has simply architecture. The fourth design used only five OTAs and two capacitors for the mixed-mode biquad filter. It can realize the voltage, current, trans-conductance, and trans-resistance mode filter responses. The advantages of the circuit are low sensitivity, the parameters and are orthogonally adjustable and the grounded capacitors can reduce the floating effects. The power dissipation is 30.95mW and the chip area is 0.823mm2. The final design uses one FDCCII, two capacitors and two resistors for the voltage mode biquad filter. The filter with two inputs and four outputs can perform simultaneous realization of voltage-mode band-reject, high-pass, band-pass and low-pass filter signals from the four output terminals, respectively. On the other hand, it also can act as a universal voltage-mode filter with three inputs and a single output and can realize five generic voltage-mode filter signals without any inverting input voltage signal and component-matching conditions. The H-SPICE simulations of five filters are with TSMC 0.35μm CMOS 2P4M process and TSMC 0.18μm CMOS 1P6M technology process respectively and Matlab was used to compare the theoretical results with the simulation. Finally, most of filter circuits have been implemented and measured.
Cheng, Hsi-chih, and 程希智. "The Design of New Universal Biquadratic Filters Using Current Conveyors." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/77902434105414325961.
Full text國立臺灣大學
電機工程學系
85
This dissertation has focused on the design of universalbiquadratic filters using current conveyors as active components, and has attempted to minimize the numbers of active and passive components used. There are four major parts. The first part(chapter 2、chapter 3)is to introduce the current conveyorsand universal biquadratic filters. In the second part( chapter 4), two new current-mode universal biquadratic filters with 3 inputs and 1 output is proposed. In the third part( chapter 5), two newcurrent-mode universal biquadratic filters with 1 input and 3 outputs is proposed. In the fourth part( chapter 6), a new voltage-mode universal biquadratic filter with 3 inputs and 1 output is proposed. In each part, second- generation current conveyorsare used as active components in the proposed circuits, and all circuits proposed achieve the goal of using fewer components . Also experiments have been conducted to verify the theoretical work.
Chen, Wei-Chun, and 陳葦峻. "Design of Universal Biquadratic Filters Using a Single Current Conveyor." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/27958537798772836607.
Full text中原大學
電機工程研究所
89
Abstract In this paper, we successfully present six new universal current/voltage-mode biquads with three inputs and a single output (but only one structure is four inputs and one output.) employing a single current-mode active device such as second-generation current conveyor (CCII), current follower (CF), third-generation current conveyor (CCIII) and differential voltage current conveyor (DVCC). All universal current/voltage-mode biquads can realize five different generic filtering signals from the same configuration. First, some universal single-CCII-based current/voltage-mode filters are presented. The proposed universal current-mode biquad can realize the low-pass and band-pass filtering signals from the same configuration without any component matching conditions. Two grounded resistors are used in the design with cascadability. On the other hand, the proposed universal voltage-mode biquad can realize the band-pass filtering signal without any component matching conditions. One grounded resistor good for adjustment is used in the design. Secondly, we propose the universal single-CF-based voltage-mode filter which can realize the band-pass filtering signal without any component matching conditions. Then, we propose the universal current/voltage-mode biquads using a single CCIII. The proposed current-mode one can realize the band-pass and high-pass filtering signals without any component matching conditions. Two grounded capacitors ideal for integration are used in the design with cascadability. The proposed voltage-mode can realize the band-pass filtering signal without any component matching conditions. And then, we employ a single DVCC with two capacitors and two resistors to construct a new universal voltage-mode biquad. The network can realize band-pass filtering signal without any component matching conditions. Two grounded capacitors and one grounded resistor ideal for integration are used in the design. Based on the device intrinsic characteristics, the circuit is the simplest structure with the minimum components and can work in high frequency range. Finally, the results of simulations using the Pspise 8.0 version and Matlab 4.0 version on personal computer AMD-450 CPU are obtained to confirm the theoretical predictions.
Chen, Ching-Chi, and 陳鏡吉. "Design of universal current-mode biquadratic filters employing current conveyors." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/13652654007482593470.
Full text中原大學
電機工程研究所
89
Abstract Firstly, one universal current-mode biquad with three inputs and one output using only two second-generation current conveyors (CCIIs), two grounded capacitors and two grounded resistors is presented. The proposed circuit has the following advantageous features: simultaneous realization of lowpass, bandpass, highpass, notch and allpass biquad signals from the same configuration, no requirement of critical component matching conditions, employment of two grounded capacitor ideal for integration, orthogonal control of ω /Q and ω , low sensitivity performance and cascadability. Secondly, we proposed a universal current-mode biquad with three/single inputs and single/three outputs using three CCIIs. The proposed circuit doesn’t need any inverting-type input current signals and has the same advantageous features of the first one. Thirdly, a new universal current-mode biquad with two/three inputs and three/one outputs using three second-generation current controlled conveyors CCCIIS has been presented. The proposed circuit doesn’t empoly any passive resistors and has the same advantageous features of the second one. Note, Q and ω are orthogonal control. Lastly, we employ the one differential voltage current conveyor (DVCC), two grounded capacitors and two resistors to design a very simple universal current-mode biquad with three inputs and one output.
Lin, Yi-Chuan, and 林益全. "Design and Analysis of Universal Voltage-Mode Filters Employing CFA." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/86029512764198311081.
Full text中原大學
電機工程研究所
96
In analogy filter circuit design, the accuracy of output signal takes the most importance in electrical circuits where the first priority is to operate the output signal in the desired frequency. However, for output accuracy and circuit compensation often complicate the electrical circuits. With the improvement in technologies, electrical circuits not only require output accuracy but also emphasized the simplicity in order achieve cost down and higher competitiveness for these are the essential elements in circuit design. It has been verified that the circuits constructed by active current mode elements have the advantage of higher signal bandwidths, larger dynamic range, greater linearity, less power dissipation and simpler circuit structure. So, the circuits which are designed by employing the current conveyor and the current feedback amplifier have been received considerable attention recently. The realization of the second-order universal (low-pass, band-pass, high-pass, band-reject, and all-pass) active-voltage filter using a single minus-type current feedback amplifier (CFA), two capacitors, and two resistors is proposed in this thesis. Compared with the published paper, the circuit offers the following advantageous features: The proposed circuit uses a single CFA, two resistors and capacitors. No requirement of circuit component matches conditions. It can simultaneously realize low-pass, high-pass, band-pass, notch and all-pass filter signals. And less power consumption, simpler circuit structure, reduce the noise and cost, low active and passive sensitivities ideal for integration. We can make the simulation result much closer to the ideal one in accordance with the passive sensitivities. Finally, the simulation results validate and the theory predictions of the proposed circuit are verified very well by using TSMC035 H-spice simulation.
Chiu, Wei-Yuan, and 邱偉元. "Design of Universal Biquad Filters employing Differential Difference Current Conveyors." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/12558006930967666382.
Full text中原大學
電子工程研究所
99
To obtain various filter functions simultaneously in the same circuit topology will increase the usefulness and reduce the cost of the circuit. Traditionally, the KHN biquad can obtain the high-pass, band-pass and low-pass signals in the same circuit topology. So KHN biquads have received much attention and the scholars have researched on this topic for a long time. However, the KHN biquad can only obtain the high-pass, band-pass and low-pass signals. In order to gain more filter signals, the concept of universal biquad is presented. The universal biquad is a biquadratic filter which can obtain the high-pass, band-pass, low-pass, notch and all-pass signals simultaneously, in the same circuit topology. From the viewpoint of the practicability, the universal biquad is better than the KHN biquad. For this reason, many universal biquad circuits are proposed in the recent years. However, these circuits are not the most simplified and require critical component matching conditions to realize the all-pass signals. Recently, the Differential Difference Current Conveyor (DDCC) as active elements received great attention due to higher signal bandwidth, wider dynamic range, greater linearity, lower power consumption, and simpler circuitry over the voltage-mode op-amps. For above reasons, this thesis focuses on the design of the voltage-mode universal biquad filters; twenty-eight new circuits are presented in chapter 4. The proposed universal circuits have the following features: high input impedance, using grounded capacitors, using the minimum passive components and realization of all the standard filter functions, that is, high-pass, band-pass, low-pass, notch, and all-pass filters simultaneously without component matching conditions. To verify the theoretical analysis, these proposed circuits were simulated using HSPICE with TSMC (Taiwan Semiconductor Manufacturing Company, Ltd.) 0.18μm, level 49 CMOS technology process parameters. All simulation results are coherent with the theoretical analyses.
LAI, WEI-HAN, and 賴威翰. "Implementation and Application of Voltage-Mode Universal Biquadratic Filters and Quadrature Oscillator." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/27c4gw.
Full text明志科技大學
電子工程系碩士班
107
In this thesis, three voltage-mode biquadratic filters and a voltage-mode quadrature oscillator based on differential difference current conveyor transconductance amplifiers (DDCCTAs) are proposed. The first proposed circuit uses two DDCCTAs, two grounded capacitors, and two grounded resistors. The use of grounded resistors and capacitors makes the proposed circuit ideal for integrated circuit (IC) implementation. The circuit simultaneously provides low-pass (LP), band-pass (BP), high-pass (HP), and band-reject (BR) filtering responses, while the all-pass (AP) filtering response can be easily obtained by adding an input voltage signal. The circuit permits high-input impedance and offers orthogonal controllability of the quality factor (Q) and resonance angular frequency (ωo). Besides, a quadrature sinusoidal oscillator with independent control of the condition of oscillation and the oscillation frequency is second proposed by modifying the first proposed voltage-mode biquadratic filter. The second proposed oscillator provides two quadrature voltage outputs and one high-impedance amplitude-tunable current output. The oscillator can be used to provide an amplitude modulation (AM) or an amplitude shift keying signals, when the input bias current of first DDCCTA is used a modulating signal. The AM/ASK signals are widely used in communication systems. The third proposed circuit uses two DDCCTAs, two grounded capacitors, and three grounded resistors. The proposed circuit simultaneously provides voltage-mode LP, BP, HP, BR, and AP filtering responses at high-input impedance terminal, which enable easy cascadeability. No critical component-matching conditions are required, and the Q and the ωo of the circuit can be orthogonally tuned. The four proposed circuit uses a single DDCCTA combined with two grounded capacitors and three resistors that can simultaneously realize LP, BP, HP, BR, and AP filtering responses from the same configuration. The circuit also enjoys orthogonal controllable of Q and the ωo. Finally, this thesis conducted simulations for the proposed circuits using Hspice and Spectre for verifying their feasibility.
Li, Ming Hsu, and 李明旭. "Design of universal biquadratic filters using current conveyor( s) and voltage follower(s)." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/87025553672523094416.
Full text中原大學
電機工程研究所
83
The current mode active device is playing an increasingly im- portant role in the development of many new high performance circuits. In this paper, We present universal biquadratic fi- lters using current conveyors and voltage followers or current feedback amplifiers which have a very wide bandwidth independent of closed loop gain. The proposed universal active filters by using the nullator- norator approach are: 1. A universal voltage-mode second-order filter with three in- puts and one output employing three current conveyors and one voltage follower, 2. A universal voltage-mode second-order filter with three in- puts and one output employing three current feedback amplifiers, 3. A universal voltage-mode second- order filter with three in- puts and one output employing one current conveyor and one volt- age follower, 4. A universal voltage-mode second-order filter with one input and three outputs employing three current conveyors and three voltage followers, and 5. A universal voltage-mode second-order filter with one input and three outputs employing four current feedback amplifiers. They offer the following advantageous features:1. realisation of lowpass, bandpass, highpass, notch and allpass signals from the same configurations, 2. low active and passive sensitivities , 3. cascadability(except the third circuit). Some of the above circuits have the attractive advantages: no requirements for component matching conditions, and orthogonal control of w and Q. Finally, we use the AD844 to verify the theoretical predic- tions of the proposed circuits.
huang, tzu-hao, and 黃子豪. "Design of Universal Biquadratic Filters with a Single Second-Generation Current Controlled Conveyor." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/91643325540301900726.
Full text中原大學
電機工程研究所
96
In the past circuit to reach output signal accuracy, usually increase many element reduce the disadvantage in circuit original. This result cause the circuit become complex. The major problem of non-accuracy output signal is parasitic effect, it means that integrated circuit (IC) have parasitic capacitance and leak current in wire to wire. This thesis research is how to reduce parasitic effect to lowest. There are active element, capacitance and inductance in present integrated circuit, although inductance in integrated has be researched, but its speed can not approach reduction in IC process. Today is how to reduce the parasitic effect of resistance, capacitance and active element. If active element have two input, but the design circuit only need one input, it have no need for two input element. Chose small active element can reduce parasitic effect. If resistance floating, two terminal have parasitic effect, ground resistance have parasitic effect in one terminal, capacitance are the same. Chose ground capacitance and ground resistance with parasitic capacitance and parasitic resistance in the same terminal can reduce parasitic effect. It have parasitic effect in circuit terminal, so design in a few terminal can get low parasitic effect. According to above, using a few element to achieve output signal accurate is the goal in this thesis. In recent of years, using current conveyor design active filters have been attended and researched by international academician. In this is, design three input and one output universal active current-mode filter using second-generation current controlled conveyor (CCCII). This active element internal resistance, denoted by Rx, at the input terminal X can be varied by tuning its bias current. It can reduce area in integrated circuit implementation. In three input and one output, we propose a single second-generation current controlled conveyor (CCCII), two grounded capacitors, and one resistor design current-mode universal biquadratic filter in this paper. This circuit has achieved the five following important advantages: (i) no component matching conditions, (ii) using least capacitance and resistance in biquadratic circuit, (iii) grounded capacitors have lowest noise, (iv)can realize on low-pass, band-pass, high-pass, band-reject, and all-pass filters in the same structure, (v) very low active and passive element sensitivity, (vi) orthogonal control of and Q, (vii) lowest power consumption, (viii) lowest noise, (ix) lowest area in integrated circuit implementation, (x) have good cost down. Finally, the simulation results validate and the theory predictions of the proposed circuit are verified very well by using TSMC035 H-spice simulation with supply voltage ±1.65V.
Lo, Jen-Hung, and 羅仁宏. "Design of Universal Current-Mode Biquadratic Filters Using a Single Differential Voltage Current Conveyor." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/25450937341499685974.
Full text中原大學
電子工程研究所
96
Abstract The goals of circuit design are accurate output signals and the low cost. To reach the goals, we can find that using the least active components, resistors, capacitors and let the components as far as possible grounded will make the output be accurate. On the other hand, in order to cost down, the counts of components used in the circuit should be the least. Besides, the advantages of reduced components are the low power consumption, the less noise of circuits made, the less parasitic effect and the small chip area. According to the above goals, this paper expects to design filters with the minimum active and passive components. In this paper, a new current-mode universal biquadratic filter employing a single differential voltage current conveyor, two grounded capacitors, and two floating resistors is presented. The circuit can realize the function of universal filter (namely, low-pass, band-pass, high-pass, band-reject, and all-pass) with the minimum active and passive components. Compare with the expectation, we can find that this circuit conforms to the low power consumption, the less noise and the small chip area. Although the parasitic effect caused by the parasitic conductance is not the least, the accuracy of the output still maintains the high level because of the minimum components used in the circuit. Moreover, the cost of this circuit is down, the circuit conforms to the current of the circuit design. The simulation of this paper uses H-spice with TSMC035 process to obtain the results. From the simulation results, it can verify that the circuit enjoys the following advantages: (i) high filter performance (ii) wide frequency range (iii) low sensitivity. This paper also considers the non-ideal effect, and proposes that using tuning method to improve this circuit. After tuning, the frequency error of this circuit is very small, so this method can improve the accuracy of the circuit. Compared with the theoretical, the simulation results are close to the theoretical. The circuit would be beneficial to apply in the future.