This thesis describes the analysis and comparison of Folded Source-Coupled
Logic (FSCL) with standard static CMOS, cascode voltage-switch logic and differential
split-level logic gates. The advantages of FSCL are low switching noise and
high operating speed. The effect of voltage and device scaling on these topologies is
evaluated in terms...
A mathematical model of Limiting Dilution Analysis for two limiting
parameters is presented and investigated. Limiting Dilution Analysis is a microbiological
cell assay developed for immunological application. In the given
case we deal with the interaction between B lymphocytes, macrophage derived
factor and T-independent antigens. The state of the art...
With the increased demand for complex digital signal processing systems,
real-time signal processing requires higher throughput systems. In the past, the
throughput has been increased by increasing the clock rates, but
synchronization can become increasingly more difficult. Recently there has
been renewed interest in designing asynchronous digital systems. In an...
There are a number of well known techniques for extracting parallelism from a given program. They range from hardware implementations, building restructuring compilers or reorganizing of programs so as to specify all the available parallelism. The success rate of any of the known techniques is rather poor over all types...
TASKMASTER is an experimental microcontroller node of a real-time control
oriented network which was proposed by James H. Herzog and Tinggui Zhang to
demonstrate the feasibility of a task oriented control structure in performing distributed
control actions. This study is a continuation of research involving the TASKMASTER
network.
A high...
When large disturbances occur in interconnected power systems, there exists the danger
that the power system states may leave an associated region of stability, if timely corrective action
is not taken. Open-loop remedial control actions such as field-forcing, line-tripping, switching of
series-capacitors, energizing braking resistors, etc., are helpful in reducing...
Three aspects of Subsynchronous Resonance (SSR) related problems in power
systems are addressed in this dissertation which aims at contributing to a better
understanding of these problems.
Subsynchronous Resonance (SSR) problems in series compensated steam-turbine
power systems co-exist with the beneficial effects provided by the series capacitors.
Since the early...
Today's power systems are undergoing dynamic changes in their operation.
The high cost of capital improvements that include new generation and transmission
projects has prompted power system planners to look for other alternatives in dealing
with increased loads and overall system growth. A dynamic braking resistor is a
device that...
Diode lasers have many advantages such as small size, high efficiency and small
angular dispersion of the collimated beam. However they also have some problems like
lack of frequency stability. They can not be tuned in wavelength. An external cavity can
solve these problems and decrease the laser linewidth.
To...
The Brush less Doubly-Fed Machine (BDFM) has the potential to be a more cost effective replacement for conventional induction or synchronous machine drives. The BDFM has two stator windings: a power winding and a control winding. An electronic power converter of variable voltage and frequency is connected to the control...
This thesis presents the design of various controllers for a highly maneuverable, high performance aircraft, namely the modified F-18. The aircraft was required to perform high angle-of-attack maneuvers, for which the aircraft behaves in as a highly nonlinear system. An adaptive PID controller was used to control the aircraft through...
Previous work at Stanford University has demonstrated that inductance in the
substrate connection is the principal problem underlying the coupling of digital
switching noise into analog circuits. The low impedance substrate can be treated
as a single node over a local area. Switching in the digital circuits produces
current transients...
The purpose of this study is to develop accuracy enhancement techniques for the Time
Domain Reflection/Transmission (TDR/T) measurements including the analysis of the
error sources for the Enhanced Accuracy TDR/T (EA-TDR/T). These TDR/T techniques
are used for IC and IC package interconnect characterization and equivalent circuit model
extraction, which are...
Due to advances in high-density low-cost VLSI and communication technology,
digital filtering and signal processing are being widely used for real-time signal processing
applications. Given the filter specification, choosing the best filter structure for a given
application is not a trivial task. The choice of a particular filter structure depends...
There seems to be a consensus that future Massively Parallel Architectures
will consist of a number nodes, or processors, interconnected by high-speed network.
Using a von Neumann style of processing within the node of a multiprocessor system
has its performance limited by the constraints imposed by the control-flow execution
model....
A CMOS implementation of a True-Q Flip Flop is presented. It can perform either as
an asynchronous storage element in micropipelines or a part of the synchronizer. It is
capable of double-edge triggering which latches data at both the rising and the trailing
edges. It is also free of the...
Recent technical progress has made new forms of controller
implementations on computers possible. Especially the technique of Fuzzy Logic
Control has found a growing number of applications. Also the development of fast
A/D converters has made the acquisation of data with vision based systems
possible. In this project we combine...
The recent advances in VLSI technology have facilitated feature shrinking
and hence a rapid increase in the levels of integration at the chip level. This increase
in the level of integration has brought along with it a host of other constraints, the
most crucial being timing management and increased power...
In this report, the optical characteristics of ZnS:Tb AC driven thin-film
electroluminescent devices are evaluated. Luminescence at low and room temperature
under a constant phosphor field is recorded in order to probe the hot electron energy
distribution. Samples fabricated by atomic layer epitaxy and by sputter deposition are
investigated and...
The main focus of this work is on the problem of existence of nonlinear optimal controllers
realizable by artificial neural networks. Theoretical justification, currently
available for control applications of neural networks, is rather limited. For example,
it is unclear which neural architectures are capable of performing which control
tasks. This...
In this dissertation, multi-rate array (MRA) architecture and its synthesis are proposed
and developed. Using multi-coordinate systems (MCS), a unified theory for mapping
algorithms from their original algorithmic specifications onto multi-rate arrays is
developed.
A multi-rate array is a grid of processors in which each interconnection may have its
own...
A Brushless, Doubly Fed Machine (BDFM) attempts to combine the advantages
of conventional induction and synchronous types of electrical machines by its unique
architecture. The validation of BDFM designs in an actual test environment requires the
estimation of the BDFM model parameters from actual experimentation. Accurate values
for the parameters...
Complementary delta-doped AlGaAs/GaAs Heterojunction Field Effect Transistor
(CHFET) devices and circuits were fabricated using MBE and a 2μ non-planar gate
recess process. Several schemes were used in an attempt to improve the performance of
the p-channel HFETs. These included delta-doping, carbon-doping and dipole-doping.
Circuits and individual n- and p- channel...
For many years, the von Neumann bottleneck has imposed speed limits on the execution of a program. Because of their sequential nature, von Neumann computers can only execute a single instruction at a time. Instructions that are side-effect free and can be executed in parallel must wait. In an effort...
