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Dissertations / Theses on the topic 'Ultra-low currents'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Проценко, Сергій Іванович, Сергей Иванович Проценко, Serhii Ivanovych Protsenko, С. А. Булатов та С. О. Рідченко. "Система вимірювання наднизьких струмів". Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/44297.

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Вимірювання наднизьких струмів з високою точністю у фемтоамперному діапазоні являє собою складну експериментальну задачу. Оскільки на процес вимірювання впливає велика кількість факторів, зокрема космічна радіація, трибологічний ефект, електромагнітні поля, тощо. З метою реалізації високоточної системи вимірювання наднизьких струмів, як однієї з складових скануючого тунельного мікроскопу нами було запропоновано схему перетворювача струм – напруга, в основі якої лежить явище накоплення заряду конденсатором при протіканні крізь нього струму. Таким чином підсилювач інтегрує вхідний сигнал, при

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Chen, Christine M. Eng Massachusetts Institute of Technology. "Integrated DC-DC converter with ultra-low quiescent current." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84879.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 93-94).<br>Based on the LTC3588, the design of a bandgap reference and a comparator for use in the control circuitry of DC-DC converter with an ultra-low quiescent current of 150nA is presented here. Not only will this thesis discuss the challenges encountered over the course of designing circuits to operate at such low current levels, but it will also provide proof of concept silicon eva

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Gardner, John Underhill. "Designing an ultra low quiescent current buck switching regulator." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46105.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 119-120).<br>The new buck regulator proposed in this thesis was designed to operate with only a few micro-amps of supply current during no load output conditions, while maintaining low output voltage ripple. The regulator also has high efficiency for current loads above an amp to make the converter useful in a variety of applications. The specifications will be achieved by implementing a control scheme similar to the one used in the LT3

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4

Karakuzulu, Alper. "Design of a Low Current Leakage Integrator for Non-Coherent Ultra-WideBand Receiver." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93531.

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Non-coherent receiver architecture is preferred more than coherent receiver architecture in many applications due to its lower complexity (hence lower cost) and lower energy consumption even though it may have shorter communication range. Even it has a lower complexity, it is still problem to utilize energy without sacrificing performance of the system. Integrator is a key block of non-coherent receiver architecture, needs to be designed for minimum power consumption and minimum distortion. Current leakage is one of the most important distortion type of integrator, needs to be taken under cont

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Ordóñez, Hurtado Andrés Fernando. "Design methodology of a modular CMOS ultra-low power self-biased current source." reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/178587.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2017.<br>Made available in DSpace on 2017-08-22T04:25:03Z (GMT). No. of bitstreams: 1 347153.pdf: 5611883 bytes, checksum: ffcc82f51f6a3197acb623b2af028078 (MD5) Previous issue date: 2017<br>Neste documento é desenvolvida uma metodologia de projeto de uma fonte de corrente auto polarizada de ultra baixo consumo de potência em tecnologia CMOS. É descrita uma topologia modular implementada com dois MOSFETs auto cascodados (SCMs) e um amplificador

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6

Shao, Hui. "System design and power management for ultra low energy applications using energy harvesting techniques /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20SHAO.

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7

Rudolph, Matthias [Verfasser], and Dieter [Akademischer Betreuer] Kölle. "Development of an ultra-low field magnetic resonance imaging scanner and DC SQUID based current sensors for the investigation of hyperpolarization techniques / Matthias Rudolph ; Betreuer: Dieter Kölle." Tübingen : Universitätsbibliothek Tübingen, 2018. http://d-nb.info/1168148766/34.

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8

Goguenheim, Didier. "CONTRIBUTION A L'ETUDE DE LA FIABILITE DES OXYDES MINCES DANS LES STRUCTURES MOS." Habilitation à diriger des recherches, Université de Provence - Aix-Marseille I, 2006. http://tel.archives-ouvertes.fr/tel-00421746.

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Ce manuscrit expose des travaux effectués entre 1994 et 2004 sur la fiabilité des composants à base de structures MOS et la fiabilité des oxydes ultra-minces de SiO2 (<10nm) utilisés comme isolant de grille dans ces composants. Nous avons établi un lien entre courants de fuite dans l'oxyde (SILC) et injection de porteurs chauds, principalement les trous chauds, dans les oxydes de 3.8 et 4.7nm. La dépendance en champ et en température du SILC soutient un modèle d'effet tunnel assisté par des défauts neutres barycentriques dans l'oxyde, même si une composante partielle de type Schottky est ident

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Tsai, Tsung Yu, and 蔡宗諭. "Current-Mode Ambient Light Sensor for Ultra Low Power Applications." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/60737147423834838362.

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碩士<br>國立清華大學<br>電子工程研究所<br>102<br>This work presents a novel current mode ultra low power ambient light sensor for distributed sensor node application. Thissensor features minimum supply voltage (<1.2V) for meeting the low power requirement, by a successive approximation register logic combined with progressive sizing current mirrors for analog-to-digital conversion, The current-mode operation simplifies the ADC circuit by eliminating the capacitors array, which further reduces its power consumption. Furthermore, controlling theadjustable dynamic range for indoor or outdoor sensing can be obta

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"A Wide Bandwidth High Power Supply Rejection Ratio PMOS Linear Low-Dropout Regulator With Ultra Low Quiescent Current." Doctoral diss., 2020. http://hdl.handle.net/2286/R.I.62673.

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abstract: With the push for integration, a slew of modern switching power management circuits are operating at higher switching frequencies in order to reduce passive filter sizes. But while these switching regulators provide power conversion at high efficiencies, their output is prone to ripples due to the inherent switching behavior. These switching regulators use linear-low dropout regulators (LDOs) downstream to provide clean supplies. Typically, these LDOs have good power supply rejection (PSR) at lower frequencies but this degrades at higher frequencies. Therefore, some residual ripple i

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11

Gang, Yung-jin 1957. "Ultra low voltage DRAM current sense amplifier with body bias techniques." Thesis, 1998. http://hdl.handle.net/1957/33344.

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The major limiting factor of DRAM access time is the low transconductance of the MOSFET's which have only limited current drive capability. The bipolar junction transistor(BJT) has a collector current amplification factor, ��, times base current and is limited mostly by the willingness to supply this base current. This collector current is much larger than the MOSFET drain current under similar conditions. The requirements for low power and low power densities results in lower power supply voltages which are also inconsistent with the threshold voltage variations in CMOS technology, as a conse

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Unterberg, Ezekial A. "Accesing high normalized current in an ultra-low-aspect-ratio torus /." 2007. http://www.library.wisc.edu/databases/connect/dissertations.html.

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DWIVEDI, MAHEEP. "DESIGN OF ULTRA LOW VOLTAGE LOW NOISE ANALOG FRONT END FOR BIO-POTENTIAL SIGNALS." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14946.

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The information extracted from the bio-potential signals such as ECG, EEG, ECoG, ERG and ENG is extensively used for health care and medical treatment purposes. The use of bio-potential acquisition systems is not only limited to the hospitals but also extended to the homes for ubiquitous health care. Therefor the demand of portable bio-signal measurement system is increasing. The key constituent to this kind of systems is the analog front-end (AFE). The analog readout front-end extracts the bio-signals directly from human body through electrodes and defines the extracted signal quality.

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14

Ebrahimi, Manuchehr. "An Ultra-Low-Power 75mV 64-Bit Current-Mode Majority-Function Adder." Thesis, 2012. http://hdl.handle.net/10012/6767.

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Ultra-low-power circuits are becoming more desirable due to growing portable device markets and they are also becoming more interesting and applicable today in biomedical, pharmacy and sensor networking applications because of the nano-metric scaling and CMOS reliability improvements. In this thesis, three main achievements are presented in ultra-low-power adders. First, a new majority function algorithm for carry and the sum generation is presented. Then with this algorithm and implied new architecture, we achieved a circuit with 75mV supply voltage operation. Last but not least, a 64 bit cur

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Hsu, Hsiang-Ju, and 許翔如. "Design of Ultra Low Power Current-Mode Logics with Adaptive Body Bias." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86237054206390502898.

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碩士<br>國立清華大學<br>電機工程學系<br>96<br>With the demand of high transmission rate, there is a tendency toward current-mode logic (CML) circuits in communication systems. Although CML circuits are of high speed performance, the sustained current source consumes static power substantially. However, because the power-delay product (PDP) of the conventional CML circuits is approximate to a constant with varying supply voltage, i.e. the power-delay tradeoff, the conventional CML circuits is difficult to reducing power dissipations while maintaining high speed through the traditional low power techniques.

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Huang, Po-Hao, and 黃柏豪. "A Novel CMOS Active Pixel Image Sensor with Ultra-Low Dark Current." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/24484804042461688162.

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碩士<br>國立清華大學<br>電子工程研究所<br>91<br>An ultra low dark current pixel has been developed for an embedded active-pixel CMOS image sensor using a standard CMOS logic process. Conventional CMOS image sensors suffer from high dark current level as a result of the high interface state density at the field oxide edge. In the proposed reset-ring pixel, the photo-sensing diode is surrounded by a ring-shaped poly-silicon gate, which serves as the reset gate at the same time isolates the photo-sensing area from the field oxide edge. Hence, the dark current level can be effectively reduced. However, in the re

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Lin, Shi-Kai, and 林詩凱. "Design of a Current-reused Low Noise Amplifier for Ultra-Wideband Systems." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/09362239086668679354.

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碩士<br>雲林科技大學<br>電子與資訊工程研究所<br>97<br>In this thesis, we design two broadband low noise amplifiers (LNAs) for ultra-wideband (UWB) communication systems, which are implemented in TSMC 0.18 μm CMOS technology. The design of the amplifiers concentrates on low power-consumption and low costs as well. The first design utilizes a current topology to save the power and the second design is used two stage cascade topology with a inter-stage network to achieve the high gain performance. In the first section, the measurement of the first LNA shows that the maximum gain is 13.2 dB, 3-dB bandwidth is

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"Ultra-low Quiescent Current NMOS Low Dropout Regulator With Fast Transient response for Always-On Internet-of-Things Applications." Doctoral diss., 2018. http://hdl.handle.net/2286/R.I.50579.

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abstract: The increased adoption of Internet-of-Things (IoT) for various applications like smart home, industrial automation, connected vehicles, medical instrumentation, etc. has resulted in a large scale distributed network of sensors, accompanied by their power supply regulator modules, control and data transfer circuitry. Depending on the application, the sensor location can be virtually anywhere and therefore they are typically powered by a localized battery. To ensure long battery-life without replacement, the power consumption of the sensor nodes, the supply regulator and, control and

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19

Chi, Ya-Hsuan, and 紀雅軒. "The Study on Ultra High Voltage Low Substrate Current LIGBT with Double Epitaxial Layer Technology." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/85324409079609169857.

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碩士<br>東海大學<br>電機工程學系<br>102<br>When lateral insulated gate bipolar transistor (LIGBT) turns on, there is a hole current injecting from the P+-anode heading to underneath and lateral area. The hole current flowing to p-type substrate will cause substrate leakage current and influence the electric circuit around. According to the method of avoiding substrate leakage current, using p-type buried layer (PBL) and n-type buried layer (NBL) to form pn-junction can increase horizontal electric field and decrease vertical electric field, therefore, the hole will not injecting to the substrate. However,

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20

Chun-HeanLim and 林俊賢. "Ultra-High Step-Down Ratio Converter with Extended Duty Cycle and Low Output Current Ripple." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/v2b6r7.

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碩士<br>國立成功大學<br>電機工程學系<br>105<br>In this thesis, an “Ultra-High Step-Down Ratio Converter with Extended Duty Cycle and Low Output Current Ripple” is proposed. Due to the change of the server and distribution infrastructure, eliminating 12 V intermediate conversion stage, a high step-down voltage converter is required to convert 48 V bus voltage to the operating voltage of microprocessor as low as 1 V. Proposed converter can achieve the required conversion ratio with an adequate duty cycle compared to the other topologies. Furthermore, this converter has an inherent interleaved structure, which

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Chen, Ting-Li, and 陳丁立. "The Research and Design of A 2-11 GHz Current Reuse Ultra-wideband Low Noise Amplifier." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/s7my72.

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碩士<br>長榮大學<br>經營管理研究所<br>97<br>The low noise amplifiers (LNA’s) are essential components in communication system front end in wireless local area networks (LAN’s), satellite links, and radiometric sensors. It dominates the noise figure and input voltage standing-wave ratio (VSWR) of the overall system because the first block signal fed from the antenna is the LNA. On the other hand, ultra-wideband amplifiers are widely used as baseband amplifiers in high-speed lightwave systems and gain blocks in microwave/millimeter-wave communication and sensor systems or in wideband instruments. In this des

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Chen, Cheng-Yu, and 陳政佑. "A Current-Mode Control Boost Regulator IC with 1-V Start-Up Feature and Ultra Low Power Dissipation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/u7zahc.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>99<br>This thesis aims to design a switching boost regulator IC with 1-V start-up feature. It can boost the input voltage from single NiMH battery (around 1.2 V) to 2 ~ 6 V. With a 15-贡A ultra low quiescent current at no load, the battery lifetime can be extended. Depending on the load level, the pulse width modulation (PWM) and pulse frequency modulation (PFM) schemes can be automatically switched to ensure high conversion efficiencies at light and heavy loads. Thus the proposed boost regulator IC is suitable for portable electronic device applications. The presente

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Chang, Kuo-Ching, and 張國慶. "Design of a cascode feedback and a low power current-reused LNA for Ultra-wideband 3.1 to 10.6GHz Wireless Receivers." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/81678411507091754175.

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碩士<br>國立交通大學<br>電子工程系所<br>94<br>A 3.1-10.6GHz low noise amplifier is applied for ultra-wideband, it introduces by the cascode R-C feedback in feedback1 and feedback2 structure and a low power, high gain current-reused structure. This research is fabricated in 0.18-μm CMOS process. In feedback1 structure, the average forward S21 is 5dB, the reverse isolation S12 is under -32dB, the S11 is under -7.5dB, the S22 is under -10dB, and the noise figure is 8dB. In feedback2 structure, the average forward S21 is 9dB, the reverse isolation S12 is under -45dB, the S11 is under -7.2dB, the S22 is under -8

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24

Chang, Chih-Wei, та 張致維. "87% Overall High Efficiency and 11μA Ultra-Low Standby Current Derived by Overall Power Management in Laptops with Flexible Voltage Scaling and Dynamic Voltage Scaling Techniques". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/xv8d54.

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碩士<br>國立交通大學<br>電機工程學系<br>103<br>For many electrical devices in our day life, power supply designed by an isolated converter is indispensable. Especially in low output power applications, the flyback converter is a better candidate. This thesis presents an AC/DC power module by designing an adapter for high efficiency laptops. The proposed overall power management (OPM) in laptops can improve the overall conversion efficiency by the flexible voltage scaling (FVS) technique in cooperation with conventional dynamic voltage scaling (DVS) technique. 12% light load efficiency and 7% peak efficiency

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柯漢宗. "A Ultra Low Power 5.4-GHz Current-Reused VCO with Internal LC Series Resonance and V-Band 50-GHz Push-Push Oscillator Using Micro-Strip Line." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/13135591603600052300.

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