Browsing by Advisor
Now showing items 1-20 of 20
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Adaptive steady-state analysis of circuits using wavelets
(2021)This thesis presents research into utilizing the sparse representations of waveforms that are possible in the wavelet domain to increase the computational efficiency of the steady-state analysis of electric circuits. The ... -
Adaptive time-step control algorithm for nonlinear time-domain envelope transient
(2006)This thesis outlines a general method to analyze circuits with several time variables using a technique known as Multi Partial Differential Equation, MPDE. The key idea of MPDE is to convert the system of ordinary ... -
Compact magnetic resonance-guided high-intensity focused ultrasound phased array system
(2021)Phased array ultrasound transducers (Txs) can induce electronically controllable localized hyperthermia to tissue deep within the human body. This localized heating can be applied to tumours as an adjunct therapy in ... -
Design and modeling of a CMOS VCO using wave digital filters / by WeiBo Li.
(2007)Wave digital filters (WDFs) transform an analog network into a topologically equivalent digital structure. A natural application of WDF is the simulation of electric circuits since measurements of any desired node voltages ... -
Design methodology for Class D ultrasound transducer drivers
(2021)Ultrasound refers to sound waves with frequencies above the upper limit of human hearing. Due to the high frequency, the energy can be concentrated and used for therapeutic applications, such as ultrasound imaging ... -
A Design Methodology for Low Power CMOS Current Source
(2016)A current reference circuit is a basic building block in analog, digital and mixed-signal design systems. This work focuses on one type of integrated CMOS current reference circuit. This source only uses one type of ... -
DVS-capable ultra-low-power subthreshold CMOS temperature sensor / by Gregory Toombs.
(2010)There are many contemporary contexts in which a small, low-power-consumption temperature sensor is very valuable. Power, area, speed and temperature range factors are important constraints in modern VLSI design. As transistor ... -
Efficient analysis of oscillators with multiple time dimensions
(2005)Harmonic Balance (H B ) analysis is an established technique for the analysis of nonlinear circuits. In this thesis, we present a method to find the transient and steady-state behavior of oscillators based on a harmonic ... -
FEM based analysis of highpass birdcage resonators for B1 field mapping
(2016)3D full wave finite element method (FEM) based electromagnetic (EM) analysis is a technique to map EM fields generated by electrical devices. To better understand and apply this technique to magnetic resonance imaging (MRI) ... -
An Integrated Full-bridge Class-DE Ultrasound Transducer Driver for HIFU Applications
(2016)This thesis present a CMOS integrated transducer driver for high intensity focused ultrasound (HIFU) applications. Because this driver will be used in a magnetic resonance imaging (MRI) environment, no magnetic components ... -
An integrated ultrasound transducer driver for HIFU applications
(2014-01-22)This thesis proposes an MRI-compatible integrated CMOS ampli er that is capable of di- rectly driving an ultrasound transducer for HIFU applications. The output stage of the integrated amplifier operates in class DE mode ... -
Multi-time analysis of CMOS circuits
(2008)Transient simulation of circuits with widely separated time constants and fast periodic excitations is not efficient because a long simulation period with small time steps is required. One approach to simulate the transient ... -
Nonlinear transient analysis based on power waves and state variables
(2010)Muhammad Ershadul Kabir was born in Chittagong, Bangladesh on July 15, 1982. He received the Bachelor of Science in Electrical and Electronic Engineering from Bangladesh University of Engineering and Technology (BUET) ... -
Nonlinear transient analysis based on wave digital filters
(2014-01-22)Simulation of large circuit networks is a CPU-time and memory consuming task. Computer clusters and multi-core processors have become common but algorithms must be parallelizable to fully take advantage of these architectures. ... -
Optimum switch sizing for class DE amplifier
(2018)Recently, integrated class DE ampli fiers without matching networks have been proposed as a compact solution to drive a multi-element piezoelectric ultrasound transducer array for high-intensity focused ultrasound (HIFU) ... -
State variable harmonic balance analysis of nonlinear circuits based on waves
(2013-02-12)Circuit simulation involving nonlinear elements can be a challenging task. From these challenges rises a demand for finding better and more efficient ways of solving such problems. This work provides a novel approach for ... -
Steady state analysis of oscillators
(2010)A common method used for steady-state analysis of oscillators is called Harmonic Balance. Harmonic balance finds the steady-state solution directly in frequency-domain. However, Harmonic Balance is very sensitive to the ... -
Sub-1 V, 4 nA CMOS voltage references with digitally-trimmable temperature coefficient
(2014-12-12)Voltage references are fundamental to mixed signal converters which are widely used in elec- tronics. Hence there are signicant advantages in having the voltage reference operate with less power while minimizing area ... -
System formulation for parallel circuit analysis
(2015-06-16)Advances in communication systems and VLSI circuits increase the performance requirements and complexity of circuits. During the design process, there is a need to perform computationally demanding numerical simulations ... -
Time-domain steady-state analysis of circuits with multiple adaptive grids
(2005)An effective adaptive algorithm to calculate the steady-state response of circuits is developed. This algorithm offers a powerful alternative to traditional steady-state simulation techniques, such as the shooting method ...
