With advancements in CMOS technology, high speed analog circuits that were
traditionally implemented with discrete circuit components can now be made monolithically.
Antialiasing filters for video signals as well as signal conditioning filters in high
speed communication channels are examples of applications where high frequency integrated
circuits are now feasible....
The feasibility of developing test circuits to perform in-circuit testing of analog
circuits is investigated in this thesis. A modular approach to analog testing has been
adopted. Accordingly, the testing of an operational amplifier, which is a basic building
block in analog circuits, is addressed. One convenient technique for measuring...
Standard methodologies exist for testing and characterizing digital circuits but the
same cannot be said of analog circuits. Though much theoretical work has been done to
model the linear and nonlinear aspects of analog circuits, a firm practical background for
the design of testable analog cells has yet to be...
Increasing densities on magnetic data storage devices leads to problems of
severe intersymbol interference (ISI), additive noise and non-linearities. Advanced
detection strategies for magnetic recording channels fall into two categories: partial
response equalization with maximum likelihood decoding and decision feedback
equalization. This study focuses on doing an adaptive all-pass forward...
Decision feedback equalization (DFE) is a sampled-data technique used for data recovery in digital communications channels. Multi-level decision feedback equalization (MDFE) has been developed for channels using the 2/3(1,7) RLL code.
The optimum detector for a digital communication channel affected by ISI and noise consists of a matched filter, followed...
Decision Feedback Equalization (DFE) in a data recovery channel filters
the bit decision in the current symbol period in generating the sample at the
comparator in the subsequent clock period. The operations of sampling,
comparing, filtering the decision bits into a feedback signal, and subtraction of
that feedback signal are...
Multi-level decision feedback equalization (MDFE) is a sampled signal processing technique for data recovery from magnetic recording channels which use the 2/3(1,7) run length limited code. The key adaptive feedback loops in MDFE are those which perform the timing recovery, gain recovery, dc offset detection, and adaptive equalization of the...
Present day data processing technology requires very high speed signal processing
and data conversion rates. Traditionally, these circuits have been implemented in silicon
MOS technology, whose high speed performance is limited, due to inherent material properties.
Though relatively immature compared to silicon technology, GaAs integrated circuit
technology appears to be...
Oversampled delta-sigma modulation is one of the widely used A/D conversion
techniques for narrow bandwidth signals. In this study several new lowpass and
bandpass delta-sigma modulator architectures as well as novel pseudo-N-path integrators
that can be used in implementing these architectures are proposed.
By using multiplexing techniques the new lowpass...
Flexible Electronics is a fast developing technology that is set to revamp and revolutionize conventional electronics through the development of devices that are easily conformable to surfaces of any arbitrary geometry. Such devices would have vast applications in areas where the rigidity of traditional silicon based electronics is undesirable, such...
Despite near unanimous opinion on the consequences of climate change by scientific community, the rate at which carbon is emitted into the atmosphere continues to increase. The need for a clean and sustainable source of energy is therefore one of humankind's most urgent challenges. Solar energy is the most abundant...
Critical consciousness (CC) and hopeful future expectations (HFE) are believed to promote positive development in youth who face structural inequalities (Callina et al., 2014; Heberle et al., 2020; Mcwhirter & McWhirter, 2008). Although both CC and HFE hold promise for enhancing the positive development of oppressed youth, gaps in the...
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G. John Geldhof
Critical consciousness (CC) and hopeful future expectations (HFE) are
Racial/ethnic minority individuals are unable to escape the realities of everyday discrimination in the United States: at least 87% of African American adolescents and 50% of Hispanic/Latinx young adults report experiencing discrimination within the past year (Neblett, Rivas-Drake, & Umaña-Taylor, 2012; Pérez, Fortuna, & Alegria, 2008; Seaton, Caldwell, Sellers, &...
War and persecution have devastating consequences, and the United States (U.S.) has a time-honored commitment to providing refuge to those most afflicted. Over the last four decades, the U.S. has provided sanctuary to more than 3.2 million refugees through its resettlement programs (U.S. Department of State, 2015a). Burma’s long-standing civil...
Oxides of nitrogen are a concern as effluents to atmospheres
because they participate in photochemical reactions which produce
smog, because they attenuate sunlight which gives the atmosphere a
reddish brown cast, and because of their toxic properties and the
health hazards associated with the photochemical products they produce.
Oxides of...
The importance of automobile exhaust as a source of atmospheric pollutants has been recognized for several years. With the
control of stationary sources in geographic areas such as Los
Angeles County, the automobile has become the major uncontrolled
source of air pollution.
The three major pollutants emitted by automobiles are...
The capabilities of the Tektronix Model J2C/7J20 Rapid Scanning
Spectrometer for the determination of molecular species resulting from
Otto cycle combustion were experimentally investigated after a literature
search of the subject area. Combustion of hydrogen-air, carbon monoxideair,
and gasoline-air mixtures in the combustion chamber of a Cooperative
Fuel Research engine...
This thesis describes a Truck Performance Simulation Model developed
for use in a United States Department of Transportation university
research project entitled "The Energy, Economic and Environmental
Consequences of Increased Vehicle Size and Weight." The performance
of the truck is found by specifying its engine, driveline and tire
characteristics and...
Geohumus is a new, unique hybrid soil amendment made of polyacrylic acid, igneous rock flour, and quartz sand. It is biodegradable and is marketed to increase soil porosity, increase plant yield, and increase plant available water by up to 30%, all while using a low inclusion rate of only 1...