Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 31 for “"voltage mode"”.
-
Power-Efficient Voltage-Mode RF Front-End Using Quantized Analog Signal Processing
… real-estate and reducing overall cost for modern RF front-ends, SAW (Surface Acoustic Wave)-less RF receivers have become a popular topic recently. Unfortunately, removal of SAW filters requires the receiver to handle large blockers (e.g., above 0 dBm) without degrading the noise floor and …
-
Architectural & circuit level techniques to improve energy efficiency of high speed serial links
… scheme to implement transmit de-emphasis in voltage-mode output drivers. Using two-level pulse-width modulation, it overcomes the tradeoff between impedance matching, output swing, and de-emphasis resolution in conventional voltage-mode drivers. A prototype PWM-based 5$\,$Gb/s voltage-mode …
-
Gating Methods for High-Voltage Silicon Carbide Power MOSFETs
… and the loss analysis will be performed for the voltage-mode and current-mode drivers. Additionally, a solution incorporating a multi-level voltage-mode driver is proposed as an alternative to the other methods. The comparison of these techniques and their ability mitigate EMI and other negative …
-
Resonant Cross-Commutated Dc-Dc Regulators with Omni-Coupled Inductors
… noise since all MOSFETs are turned on with zero voltage within a wide load range. A state-space model was developed to calculate the voltage gain, voltage stresses, and current stresses. Design guidelines for the rccBuck converter operating at continuous voltage mode or discontinuous voltage mode …
-
Single-switch three-phase zero-current-transition rectifier with power factor correction
… design guidelines are provided. The small signal model of the circuit is developed, and voltage mode control is designed. The results are verified on a 4 kW, 50 kHz, experimental ZCT rectifier with an IGBT; total harmonic distortion below 9% and efficiency above 95% were obtained.
-
CMOS current amplifiers : speed versus nonlinearity
… circuit design using various types of current-mode amplifiers. These circuits are analysed and realised using modern CMOS integration technologies. The dynamic nonlinearities of these circuits are discussed in detail as in the literature only linear nonidealities and static nonlinearities are …
-
Analysis of boost converter in continuous conduction mode and discontinuous conduction mode
… a boost converter using continuous conduction mode and discontinuous conduction mode. The first part of the thesis analyzes a boost converter using continuous conduction mode with voltage mode control. A switch network which eases the analysis of the boost converter is modeled. Important …
-
Peak power tracking for a solar buck charger
… The tracker takes the place of the current mode loop in the converter's control scheme by providing a battery with peak charging current. A voltage mode loop is also designed to take over control from the tracker to complete the multi-loop structure. A solar panel simulator is designed to …
-
Non-intrusive water utility monitoring and free-space load monitoring
… an electroquasistatic (EQS) sensor to detect voltage-mode events. The free-space sensor was able to detect events in a room, such as the activation of a line upon turning on a power strip or switching a light switch. This sensor could supplement a power monitoring system by helping to localize …
-
Analysis and design of multiple-output forward converter with weighted voltage control
This work presents the modeling and analyses of multiple-output forward converters with weighted voltage control. Based upon the analyses, the systematic design methodologies and design tools are provided. A power stage de model including all the major parasitics, which are detrimental to the …
-
Sensorless Control of a Bidirectional Boost Converter for a Fuel Cell Energy Management System
… the specifications. A sensorless average current mode is designed, implemented and verified through testing in a low-cost fixed-point DSP. Both boost and buck modes are accurately modeled and voltage and current controllers are designed for good closed-loop response. The accuracy of the sensorless …
-
Adaptive Control of a Step-Up Full-Bridge DC-DC Converter for Variable Low Input Voltage Applications
… system where the input is a variable low voltage high current source. The converter is designed to step-up the low voltage input to an acceptable level that can be inverted to a 120/240 VAC 60Hz voltage for residential power. A DSP based adaptive control model is developed, taking into …
-
Modeling and design of digital current-mode constant on-time control
… DC/DC converter, especially with regards to the voltage regulator module. One issue is the limit cycle oscillation problem caused by the quantization effect from the ADC and DPWM of the digital control chip. Another issue is the delay problem coming from the sample-hold effect. In this thesis, …
-
System interactions and design considerations for distributed power systems
… the stability criteria. Either analytical models or empirical data may be used in the interaction analysis. Design of EMI filters for a two-stage DPS is comprehensively discussed. A detailed analysis of the effects of input filters on current-mode controlled single-module regulators is …
-
Current-Mode Control: Modeling and its Digital Application
Due to unique characteristics, current-mode control architectures with different implementation approaches have been widely used in power converter design to achieve current sharing, AVP control, and light-load efficiency improvement. Therefore, an accurate model for current-mode control is …
-
High performance control of VRM circuits
Voltage Regulator Modules (VRM), which are used to power advanced microprocessors, have stringent efficiency and transient response requirements. The multiphase buck converter topology is popularly used for such application, because of its ability to handle large load current and to achieve fast …
-
Control Designs for Low-Loss Active Magnetic Bearing: Theory and Implementation
… reduced, preferably to zero. This zero-bias (ZB) mode of operation cripples the classical control techniques which are customarily used and nonlinear control is required. As a compromise between AMB stiffness and efficiency, a new flux bias scheme is proposed called the generalized complementary …
-
Porous Silicon as Broadband Antireflector for Photovoltaic Application.
… was the counter electrode performed at constant voltage and constant current modes. For the constant voltage mode, three, ten, and thirty minute anodized samples exhibited average reflectances of ~6%, ~5% and ~7% respectively in the ultra-violet to the near infra-red regions. For constant current …
-
Ring oscillators for high performance clock synthesis and sensor interfaces
… locked to an RC sensor using a FLL. We propose a voltage mode FLL structure which guarantees very small area and low noise thanks to a novel 3-phase frequency-to-voltage converter which eliminates charge pump noise. The quantization noise is rejected by passing the 10 phases of the RO to an edge …
-
Nonlinear Dynamics and Interactions in Power Electronic Systems
… operating in the continuous conduction mode are investigated. A quick review of the existing analysis techniques and their limitations is first presented. A discrete nonlinear time-domain model is derived for open-loop DC-DC converters. This model is then extended for closed-loop …
Page 1 of 2