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Dissertations / Theses on the topic 'Operational transconductance amplifier (OTA)'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Vora, Ashish. "A 90 dB, 85 MHz operational transconductance amplifier (OTA) using gain boosting technique /." Link to online version, 2005. https://ritdml.rit.edu/dspace/handle/1850/1319.

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2

Ramachandran, Arun. "Nonlinearity and noise modeling of operational transconductance amplifiers for continuous time analog filters." Texas A&M University, 2003. http://hdl.handle.net/1969.1/3925.

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A general framework for performance optimization of continuous-time OTA-C (Operational Transconductance Amplifier-Capacitor) filters is proposed. Efficient procedures for evaluating nonlinear distortion and noise valid for any filter of arbitrary order are developed based on the matrix description of a general OTA-C filter model . Since these procedures use OTA macromodels, they can be used to obtain the results significantly faster than transistor-level simulation. In the case of transient analysis, the speed-up may be as much as three orders of magnitude without almost no loss of accuracy. T

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3

Sun, Shao-Chi. "Design and evaluation of a g m-RC bandpass filter using a 42 GHz linear OTA incorporating heterojunction bipolar transistors." Ohio University / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1179864547.

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4

LEITE, CORREIA DE TOLEDO PEDRO FILIPE. "Digital-Based Analog Processing in Nanoscale CMOS ICs for IoT Applications." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2969648.

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5

Michalička, 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.

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This diploma thesis deals with design of reconection-less electronically reconfigurable filter structures which have single input and single output using unconventional active elements, which have ability to adjust one of their parameter e.g. gain or transconductance. The first part describes basic parameters of frequency filters, the division of filters by frequency transfer response and used circuit elements, their operational modes, the principle of reconnection-less electronically reconfiguration and the circuit design method MUNV. Second part describes all active elements used in the prop

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6

Anderson, Matthew Wilamowski Bogdan M. "Wide range tunable transconductance filters." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Electrical_and_Computer_Engineering/Thesis/Anderson_William_22.pdf.

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7

Czajkowski, Ondřej. "Operační transkonduktanční zesilovač (OTA) pro využití v programovatelných analogových polích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219036.

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Operational amplifier will be designed and optimized with respect to set of required parameters. Real CMOS technology (available at Department of Microelectronics) will be used for designed OTA circuit and its simulations. Designed OTA will be used as universal operation amplifier configurable block in FPAA (field-programmable analog array) structures.

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8

Nousek, Petr. "Porovnávací studie nízkonapěťových operačních zesilovačů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218696.

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This work deals with methods used in design of low voltage operational amplifiers. It describes some of the most commonly used methods. Properties of these methods are verified by computer simulation of operational transconductance amplifiers that are utilizing them.

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9

Mora, Sánchez Alexander [Verfasser]. "Sigma-Delta Analog-to-Digital Modulators with a Single Operational Transconductance Amplifier for Low-Power SoC Design in Biomedical Applications / Alexander Mora Sánchez." Aachen : Shaker, 2007. http://d-nb.info/1164340336/34.

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10

Johansson, Anders. "Evaluation of different CMOS processes using a circuit optimization tool." Thesis, Linköping University, Electronics System, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-52338.

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<p>The geometry of CMOS processes has decreased in a steady pace over the years at the same time as the complexity has increased. Even if there are more requirements on the designer today, the main goal is still the same: to minimize the occupied area and power dissipation. This thesis investigates if a prediction of the costs in future CMOS processes can be made. By implementing several processes on a test circuit we can see a pattern in area and power dissipation when we change to smaller processes.</p><p>This is done by optimizing a two-stage operational transconductance amplifier on basis

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11

Kosztyu, Tomáš. "Moderní aktivní prvky a jejich chování v lineárních blocích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218124.

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The topic of this master’s thesis was a frequency filters and their realization using modern active elements like UVC, UCC, VFA, CFA and OTA. The base point of this thesis was designed frequency filters with these active elements, when the shape of the transfer function will be identical for all structures and compare the characteristics of active elements. The proposed frequency filters are second order with one or two active elements. In the first part of thesis are discussed basic properties of frequency filters, their properties and distribution. Next are described the general characterist

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12

Prášek, David. "Autokompenzace ofsetu operačního zesilovače pro přesná měření." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218048.

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This work deals with the problems of the design of two stage operational amplifier with automatic offset compensation for precise measurement. Full design operational amplifier is aimed at appropriate realization in technology CMOS07 with usage Cadence design environment. The goal of the design is minimum offset value as well as the adherence to the parameters of the operational amplifier which are introduced in submission of the thesis.

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13

Uher, Jiří. "Návrh filtračních struktur fraktálního řádu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242051.

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This thesis deals with the fractional (1+)-order filters. The proposed filters operate in the current-mode. The derivation of the filters has been achieved using a third-order aproximation of the coresponding fractional-order transfer functions. It also describes active elements such as universal current conveyor, current follower and operational transconductance amplifier. In the end of this thesis some new circuit solutions of the fractional-order filter are proposed. Then the proposed filters are realized and experimentally measured.

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14

Langhammer, Lukáš. "Nelineární obvodové struktury s proudovými aktivními prvky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219456.

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This thesis deals with non-linear curcuit structures with current active elements. In its introduction this work deals with a description of the current active elements, such as current conveyor, transconductance operational amplifier and current follower. Further the text pays attention to the possiblities of the circuits for modification signals in analogue technology. First are described circuits of diode limiters and transducer. Great attention is paid to the amplifiers with current active elements. Are propřed simulated and practically realized circuits of universal precise full-wave rect

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15

Gajdoš, 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.

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The aim of the thesis was design of reconnection-less and electronically reconfigurable filters of SISO type with non-traditional active elements. Adjustability of bandwidth or quality factor is also required. First part of the thesis deals with theoretical analysis of filters, their operation modes and design of frequency filters using Signal-flow graph method aswell. Last but not least, electronical reconfiguration of transfer function and parasitic analysis was discussed. Another part describes active elements used in the practical part of thesis. Behaviors and design of active elements usi

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16

Polách, Petr. "RC oscilátory pro pásmo vyšších kmitočtů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217477.

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This thesis deals with RC oscillators applicable in higher frequency ranges with the use of modern active elements. For individual function blocks (conveyor, current feedback amplifier, operational transconductance amplifier, voltage feedback amplifier) suitable models are suggested for the circuit simulator PSpice covering their characteristics on various levels, from an ideal one up to the full description of parasitic effects. On the basis of the study of recommended literature and company documentation various oscillator connections of the ranks 2 and 3 are suggested. By analysis through c

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17

Prát, 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.

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The aim of master's thesis was design of electronically reconfigurable filters. Adjustability of pole frequency or quality factor is possible. First part of thesis deals with theoretical analysis of filters, their operation modes, design of frequency filters using Signal-Flow graph method and parasitic analysis. The next part describes active elements used in thesis. In a third part, three reconfigurable filters are described and designed and their simulations and parasitic analysis are made. Last part deals with filter design in EAGLE and experimental measurement.

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18

Langhammer, Lukáš. "Plně diferenční kmitočtové filtry s moderními aktivními prvky." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-256565.

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Tato disertační práce se zaměřuje na výzkum v oblasti frekvenčních filtrů. Hlavním cílem je navrhnout a analyzovat plně diferenční kmitočtové filtry pracující v proudovém módu a využívající moderní aktivní prvky. Prezentované filtry jsou navrženy za použití proudových sledovačů, operačních transkonduktančních zesilovačů, plně diferenčních proudových zesilovačů a transrezistančních zesilovačů. Návrh se zaměřuje na možnost řídit některý z typických parametrů filtru pomocí řiditelných aktivních prvků, které jsou vhodně umístněny do obvodové struktury. Jednotlivé prezentované filtry jsou navrženy

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19

Csipkes, Gabor-Laszlo. "Integrated realizations of reconfigurable low pass and band pass filters for wide band multi-mode receivers." Doctoral thesis, [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=979677483.

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20

Csipkes, Gabor-Laszlo. "Integrated realizations of reconfigurable low pass and band pass filters for wide band multi-mode receivers." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1145345696511-52655.

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With the explosive development of wireless communication systems the specifications of the supporting hardware platforms have become more and more demanding. According to the long term goals of the industry, future communications systems should integrate a wide variety of standards. This leads to the idea of software defined radio, implemented on fully reconfigurable hardware.Among other reconfigurable hardware blocks, suitable for the software radio concept, an outstanding importance belongs to the reconfigurable filters that are responsible for the selectivity of the system. The problematic

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21

Li, Rong Ding. "A very wideband operational transconductance amplifier and capacitor (OTA-C) filter in CMOS VLSI technology." Thesis, 2003. http://spectrum.library.concordia.ca/2281/1/MQ83870.pdf.

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Wideband analog signal processing systems are useful in many applications, such as telecommunication, multimedia and consumer electronics. An analog filter is an important subsystem in such systems. Among the existing realization methods of continuous-time domain integrated analog filter, OTA-C topology is the most useful one, and it offers good performances with lower power consumption and high frequency operation. In this work, several existing OTA cells selected from literature are studied. Based on the comparison of g m value, bandwidth, output resistance, and dynamic range in terms of DC

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22

Mobarak, Mohamed Salah Mohamed. "Linearization and Efficiency Enhancement Techniques for RF and Baseband Analog Circuits." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8836.

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High linearity transmitters and receivers should be used to efficiently utilize the available channel bandwidth. Power consumption is also a critical factor that determines the battery life of portable devices and wireless sensors. Three base-band and RF building blocks are designed with the focus of high linearity and low power consumption. An architectural attenuation-predistortion linearization scheme for a wide range of operational transconductance amplifiers (OTAs) is proposed and demonstrated with a transconductance-capacitor (Gm-C) filter. The linearization technique utilizes two matche

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23

Kim, Ju Sung. "Broadband RF Front-End Design for Multi-Standard Receiver with High-Linearity and Low-Noise Techniques." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10512.

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Future wireless communication devices must support multiple standards and features on a single-chip. The trend towards software-defined radio requires flexible and efficient RF building blocks which justifies the adoption of broadband receiver front-ends in modern and future communication systems. The broadband receiver front-end significantly reduces cost, area, pins, and power, and can process several signal channels simultaneously. This research is mainly focused on the analysis and realization of the broadband receiver architecture and its various building blocks (LNA, Active Balun-LNA, Mi

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24

"Operational transconductance amplifier with a rail-to-rail constant transconductance input stage." 2002. http://library.cuhk.edu.hk/record=b5891100.

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Chan Shek-Hang.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.<br>Includes bibliographical references (leaves 94-97).<br>Abstracts in English and Chinese.<br>Abstract --- p.i<br>Acknowledgement --- p.iv<br>Table of Contents --- p.v<br>List of Figures --- p.ix<br>List of Tables --- p.xiii<br>Chapter Chapter 1 --- Introduction --- p.1<br>Chapter 1.1 --- Overview --- p.1<br>Chapter 1.2 --- Significance of the research --- p.2<br>Chapter 1.3 --- Objectives --- p.3<br>Chapter 1.4 --- Thesis outline --- p.4<br>Chapter Chapter 2 --- Background theory --- p.5<br>Chapter 2.1 ---

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Jiao, Weishing, and 焦偉信. "Low-Power Two-Stage CMOS Operational Transconductance Amplifier." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11329314256451004703.

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碩士<br>國立高雄海洋科技大學<br>微電子工程研究所<br>100<br>Two-stage operational transconductance amplifiers (OTA) operated in the ±1.5V power supply range were designed and fabricated using the TSMC 0.35um technology. Both NMOS and PMOS differential input topologies were designed and its circuit characteristics were compared and analyzed. HSPICE simulated results showed following characteristics for both NMOS and PMOS OTA circuits: Power consumption, 0.19mW, 0.28mW; Phase margin, 53°, 45°; Unity gain band width, 4.4MHz, 1.6MHz; Open loop gain, 76.6dB, 73.2dB; Input common mode range, ±1.3V, ±1.3V and Output swi

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Yang, Kun-Yin, and 楊昆穎. "The Research of Operational Transconductance Amplifier and Current Follower." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/ut6t9k.

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碩士<br>中原大學<br>電子工程研究所<br>91<br>There are two emphases in this thesis: the transformation of voltage-mode to current-mode OTA circuit in chapter 3 and low voltage CMOS class AB current follower in chapter 4. In chapter 3, we use a simple and predictable adjoint transformation to transfer the voltage-mode OTA circuit into current-mode one that we anticipated. The transfer function of the voltage-mode OTA circuit will be identical to that of the current-mode OTA circuit and vice versa. This adjoint transformation is very simple. When transfer, we need only BOTA and OTA as active elements and pass

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M, Abhinav. "Process Aware design & Optimization of Operational Transconductance Amplifier." Thesis, 2018. http://ethesis.nitrkl.ac.in/9954/1/2018_MT_216EC2204_MAbhinav_Process.pdf.

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This work presents a novel method that is used for optimizing and provide automation in analog IC design. Rapid growth in VLSI technology leads to integration of analog and digital circuitry like pipelined ADC, Sigma delta ADC etc. Even though analog circuit constitute small portion of analog and mixed signal circuitry the design complexity and time consuming tasks make it more tedious. Here in my work I am considering optimization of Operational Transconductance Amplifier, an important part in analog design for case study. Infeasibility Driven Evolutionary Algorithm is the proposed methodolog

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Wang, Chao-Ho, and 王朝河. "A Novel Voltage-Control Sinusoidal Oscillator using Operational Transconductance Amplifier." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/43060234384192057704.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>90<br>Abstract In this research, we intend to develop a sinusoidal VCO with low harmonic distortion. A new sinusoidal VCO is developed with only two OTAs. The number of OTAs is fewer than that previously presented in other papers. The oscillator will be easy to debug and the complexity of the oscillator can be reduced. An AGC control mechanism is applied to the VCO to control the oscillation amplitude and to reduce the harmonic distortion. The oscillation is designed with the frequency around 100MHz and the oscillation amplitude is around 100mV. The simulation resu

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Tom, Strung-Ane, and 唐春安. "The Design and Applications of Highly-Linear Operational Transconductance Amplifier." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/65721925636355022401.

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Lee, Kun-Chu, and 李昆築. "An Integrated Operational Transconductance Amplifier Design for Doppler Ultrasound System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/w9g7n5.

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碩士<br>國立中央大學<br>電機工程學系<br>106<br>In recent years, the global aging has driven the development of the therapeutic and auxiliary medical device market, especially the use of home care, such as blood glucose meters, blood pressure monitors, etc. Therefore, it is very important to develop care equipment with mobility, miniaturization, and low power consumption. This paper presents the design of the probe driving circuit in Doppler ultrasound system for blood flow sensing, which is an operational- transconductance-amplifier(OTA) with high current, high linearity, and low power consumption. Thre

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Durisety, Chandra Sekhar Acharyula. "A high gain multi-stage operational amplifier using compound transconductance element." 2006. http://etd.utk.edu/2006/DurisetyChandra.pdf.

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Wang, Wei-Chiang, and 王煒強. "Testable Design and Implementation of Operational Transconductance Amplifier-Capacitor Based Circuits." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/31880000026438702132.

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碩士<br>國立成功大學<br>電機工程學系<br>87<br>The operational transconductance amplifier-capacitor (OTA-C) technique has become today the technique of choice for high-frequency circuits. However, similar to other analog circuits, testing an OTA-C based circuit is a difficult problem. In recent years, this problem becomes even more difficult because of the increase of circuit complexity. In this thesis, a systematic approach to design testable OTA-C based circuits is proposed. We first derive a general form for the state equation of OTA-C low-pass filters and OTA-C oscillators. The

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Chen, Hung-chang, and 陳弘昌. "A Linearity Improved and Digitally Programmable Operational Transconductance Amplifier for Gm-C Filter." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/63599032971070667902.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>95<br>In this thesis, a linearity improved and digitally programmable operational transconductance amplifiers (OTA) for Gm-C filter has been designed and implemented in a 0.35-µm 2P4M CMOS process. In order to improve the linearity of OTA, we used an adaptive biasing technique. In addition, the transconductance of OTA can be controlled by our proposed digitally programmable current mirror technique. A second-order bandpass filter was designed to verify the linearity and transconductance of OTA by using our proposed techniques. The digitally programmable OTA has be

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pan, sheng-wen, and 潘聖文. "Low Power Rail-to-Rail Input Stage Operational Transconductance Amplifier for Biomedical System Application." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/62665708499160164958.

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碩士<br>中原大學<br>電子工程研究所<br>97<br>The development of integrated circuit (IC) technologies for biomedical system applications has been widely used in recent years. Moreover, it has brought a considerable amount of portable and implantable biomedical equipment. In order to satisfy with ambulatory functions, low power and low voltage has been essential condition for the front-end circuit. Hence, as a basic analog building block, operational transconductance amplifier (OTA) has a limited voltage headroom due to the low battery-voltage characteristics, and it thereby needs rail-to-rail input signal sw

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Fu, Ming-Kai, and 傅明楷. "A Novel Low Voltage Operational Transconductance Amplifier Design Based on the Common-Mode Feed-Forward Technology." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/32598379538616172488.

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碩士<br>逢甲大學<br>電子工程所<br>97<br>A CMOS pseudo differential operational transconductance amplifier (OTA) has been proposed in this study. It can operate at very low supply voltage with high linearity and high output impedance. Besides, it enhances the common mode rejection ratio (CMRR) by using a special common mode feed forward (CMFF) structure. The simulation results show that the CMRR is 79.6dB and this circuit has an open loop gain of 57.7dB under the supply voltage at 1.1V only. The unity gain frequency is 2.86MHz and it consumes only 63μW for the power dissipation. The chip has been manufac

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Abu, Patricia Angela R., and 艾翠霞. "Design of 60-Hz Notch Filter and Operational Transconductance Amplifier for Minimizing Power Line Interferencein Electrocardiogram Signals." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35512938198195704092.

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碩士<br>中原大學<br>電子工程研究所<br>97<br>A 60-Hz notch filter is designed to minimize the power line interference on electrocardiograph signals. A high CMRR and low noise operational transconductance amplifier was first designed which are major parameters for noise elimination on biomedical signals. The OTA was fully tested on all process corners for both MIMOS 0.35µm and TSMC 0.35µm technology and was fabricated using TSMC 0.35µm technology. The OTA has a CMRR of 138.28dB and 137.34dB for MIMOS and TSMC pre layout simulation respectively. TSMC post layout simulation shows a CMRR of 135.74dB. The n

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BHANU, V. V. UDAYA. "Implementation of Simulated Inductor with recently introduced active building blocks." Thesis, 2013. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14242.

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In this work few simulations of inductors is performed with recently developed active devices. Firstly, a Bipolar transistors based Operational Transconductance Amplifier (OTA) was used for realizing floating positive and Negative Inductance. The simulated inductance values can be controlled electronically by adjusting the bias currents of the OTA. Each inductance simulators comprises of only two OTAs and one grounded capacitor, without any external resistors and components matching requirements. The performance of the floating Positive inductance is verified by an series RLC resonant circuit

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Chang, Yen-Shuo, and 張晏碩. "On the Design of a Low Voltage Pseudo Differential Operational Transconductance Amplifier with Common Mode and HD3 Feed Forward Cancellation Technologies." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/40563080582167111030.

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碩士<br>逢甲大學<br>電子工程所<br>100<br>A pseudo differential Operational Transconductance Amplifier (OTA) has been proposed in this research. This OTA can operate at low supply voltage with high linearity. Here, we use two technologies, one of them is common mode feed forward and the other is HD3 feed forward. Simulation results show that the common mode rejection ratio (CMRR) is 68.6dB and third harmonic distortion (HD3) is -66.6dB. This OTA consumes 75.8μW for the power dissipation. The chip has been manufactured in a 0.18μm-CMOS technology. The chip area is 0.69x0.38 mm2.

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