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Showing 1 to 20 of 20 for “"Negative Resistance"”.
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Stability Analysis of Negative Resistance-Based Source Combining Power Amplifiers
<p>An investigation into the stability of negative resistance-based source combining power amplifiers is conducted in this thesis. Two different negative resistance-based source combining topologies, a series and parallel version, are considered. Stability is analyzed using a simple and intuitive …
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Rectangular Waveguide Filled with Uniaxial Medium and Negative Resistance Enhanced Composite Right/Left-Handed Transmission Line
… Analyses and experimental results of the negative resistance enhanced composite right/left-handed (NR-CRLH) transmission line are presented. As a demonstration of its unique amplitude and phase behaviors and its application, the detailed analysis of the structure is followed by an example …
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Properties of Intercoupled Transmission Lines Terminated by Negative Resistance Elements With Applications to Tunnel Diode Pulse Circuits
Made available in DSpace on 2014-12-08T22:23:23Z (GMT). No. of bitstreams: 1 6406068.pdf: 2499213 bytes, checksum: 724ce0d25c094f1c32fa6e7785d55aa4 (MD5) Previous issue date: 1963
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An Analytical and Experimental Study of a Nonlinear Negative Resistance Oscillator Containing An Inductor Exhibiting Both Saturation and Hysteresis
Made available in DSpace on 2014-12-08T22:23:46Z (GMT). No. of bitstreams: 1 6511770.pdf: 2782206 bytes, checksum: efd672130cdc1937391e4267f07511fb (MD5) Previous issue date: 1965
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Physics and Simulation of High-Speed Heterostructure Devices
… transistor, and real-space transfer (negative resistance field-effect transistor, charge injection transistor) transistors.
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MICROWAVE ACTIVE INDUCTOR ANALYSIS AND DESIGN
… conventional passive inductor has an intrinsic resistance and a stray capacitance, which will severely affect its quality factor and available frequency band in the circuit design. In this project, some novel microwave active inductors and the designed circuit configurations are presented. Their …
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Real-Space Transfer Transistors Grown by Metalorganic Chemical Vapor Deposition
… metalorganic chemical vapor deposition. In the negative-resistance field-effect transistor and the charge-injection transistor, the standard GaAs electron channel is replaced with a strained-layer ln$\sb{x}$Ga$\sb{1-x}$As electron channel. With increasing indium composition in the channel, the …
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Q-Enhanced LC Resonators for Monolithic, Low-Loss Filters in Gallium Arsenide Technology
… LC resonator structures using FET-based active negative resistance circuits. Three passive resonators were designed, fabricated, and measured to determine their loss and frequency response. Furthermore, six Q-enhanced resonators were designed, fabricated, and measured to compare the performance …
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Electroforming and electron emission in metal-borosilicate glass-metal structures
… electron emission, voltage-controlled negative resistance, electroluminescence, and switching phenomena. Previous work in this field is reviewed. By making certain modifications to the filamentary conduction theory of Dearnaley, the time dependence of the circulating current and …
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Design and development of distributed feedback transistor lasers
… non-linear mixing, frequency multiplication, negative resistance, and photon-assisted switching. To date, all of these devices operate as multi-mode lasers without any type of wavelength selection or stabilizing mechanisms. Stable single-mode distributed feedback diode laser sources are …
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Gallium arsenide field effect transistors microstrip integrated circuit dielectric resonator oscillators
… derived by Kurokawa can be applied to both negative resistance and feedback oscillators. Impedance locus, device-line and operating point concepts provide a convenient framework for understanding hysteresis in microwave oscillators. The work by Kurokawa can also be translated into the …
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MICRO-CIRCUIT DIODE FOR ULTRA-LOW-POWER ENERGY HARVESTING
… mV. However, due to the large leakage current in negative resistance region, this micro-circuit is unable to show advantages in piezoelectric energy harvester applications.
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Studies of the electrical properties and electroforming of thin insulating films
… electron emission, electroluminescence, negative resistance and thermal-voltage memory effects. Previous work in the field is critically reviewed. It was shown that the time dependence of the device current and emission current can be explained by making certain modifications to the …
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Design of a Wireless Power Transfer System using Electrically Coupled Loop Antennas
… In order to complete the system design, a negative resistance-based oscillator is designed and fabricated, that incorporates the antennas as a load and oscillates at the required frequency. Some changes in load conditions and power handling are studied by the use of two circuits for …
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Predictors of Carbapenem Resistant Gram-negative Bacteria in a Consortium of Academic Medical Center Hospitals
<p>Background: Gram-negative resistance is a growing problem worldwide. It is generally believed that rates of resistant bacteria within a hospital are a function of antibiotic use, resistant organisms brought into the hospital, infection control efforts, and underlying severity of patient illness. …
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A Fully Monolithic 2.5 GHz LC Voltage Controlled Oscillator in 0.35 μm CMOS Technology
… MOSIS. The oscillator uses a complementary negative transconductance topology. This oscillator circuit is analyzed as a negative-resistance oscillator. Monolithic inductors are designed using full-wave electromagnetic field solver software. The design of an "inversion-mode" MOS (I-MOS) …
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Design of Integrated, Low Power, Radio Receivers in BiCMOS Technologies
… inductors employed is typically small (Q < 10), negative resistance circuits can be used to increase the effective Q to arbitrarily high values. Hence, very small fractional bandwidths (< 2%) can be obtained. Moreover, even a small inductor Q is shown to provide significant increases in dynamic …
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A VHF/UHF Voltage Controlled Oscillator in 0.5um BiCMOS
… form. Design is performed at 560 MHz using the negative resistance concept. Simulation results from Pspice and the Agilent ADS are presented. Implementation related issues such as bondwire inductances and layout details are covered. The VCO characterization is shown over several environmental …
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Stability Analysis of Three-Phase AC Power Systems Based on Measured D-Q Frame Impedances
… are constant-power loads (CPLs) exhibit a negative incremental input resistance within the output voltage regulation bandwidth. In the case of dc systems, design requirements for impedances that guarantee stability have been previously developed and are used in the design and specification …
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Analysis and measurement of anti-reciprocal systems
… to search for the theoretical explanation of the negative real part (resistance) observed in Zmot in an electromechanical system, as it breaks the positive-real (PR) property of Brune’s impedance, as well as the conservation of energy law. Specifically, we specify conditions that cause negative …