A modeling technique for simulating the noise
performance of chopper-stabilized switched-capacitor
filters using SPICE2 is presented. A method for
selection of switched-capacitor network (SCN) stages
to be chopped and an op amp topology for low noise
applications are also outlined. Validity of the
modeling is verified by the close agreement...
A short-circuit-protected line-driver circuit is
particularly adapted for use in a CMOS differential line-driver
system, where one line-driver circuit provides a
true output signal, and another line-driver circuit
provides a complementary false output signal. A short-circuit
is sensed by measuring current through a secondary
pull-up transistor, and disabling a primary...
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...
A comparison of two novel demodulators. The first is a basic zero crossing demodulator,
as introduced by Beards. The second is an approach proposed by Hovin. The two demodulators
are compared to each other and to the conventional method of demodulation.
A new, computer oriented system for automatic, in situ
monitoring of water quality is proposed which makes full and effective
use of modern computer technology. The main objective of this thesis
work was the development of the concept for in situ computer controlled
experimenting as a reasonable and effective means...
Amateur Packet Radio Networking presently uses the NET/ROM
protocol to establish the network. NET/ROM is considered to be
insufficient to support the expected growth of the network. This
research work proposes to use the TCP/IP protocol suite instead to
build the network. A comparison between features of both protocols
supports...
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...
Pulse Width Modulation (PWM) has been used extensively for motor control, DC-AC
converters, DC-DC converters and in audio applications. The conventional method of
generating a pulse width modulated signal involves generating an accurate sawtooth or triangle
wave using analog circuits. In CMOS, being analog circuit intensive puts extra constraints
on...
An adaptive decentralized nonlinear controller for a robot manipulator
is presented in this thesis. Based on the adaptive control schemes designed
by Seraji [18], Dai [30], and Jimenez [31], we redesigned and further
simplified the control algorithm and, as a consequence, we achieved better
path tracking performance.
The proposed adaptive...
A fast-settling CMOS operational amplifier using the
folded-cascode topology has been designed. The design is
based on a theory developed by Yang et al for the optimum
settling time of two-pole systems for switched-capacitor
applications. The theory states that the two poles are
separated by a given factor in order...
A Graphic User Interface is developed to determine the existence of a
particular sequence of piano notes within a monophonic sound waveform.
Such waveforms are recorded within the Graphic User Interface and then
passed to the monophonic analysis engine. The first phase of analysis segments
the PCM sound data to...
GEMS (Graphical Ethernet Monitoring System) is an
enhancement to the SU-PC/IP NETWATCH program, for the
graphical display and recording of computer network packets.
SU-PC/IP (Stanford University Personal Computer/Internet
Protocol) NETWATCH displays one line of information per
packet, including the packet type, IP addresses, packet
size, and protocol type, etc. This...
Accurate Position Control is an important technique in
robotic engineering. The working environment of robotic
systems presents special requirements for position control.
The scope of this study is to explore the control algorithms
of a digital, hierarchical position control system. Detailed
analysis and simulation show that the system can be...
An extremely important area that has enabled or will enable many of the
digital video services and applications such as VideoCD, DVD, DVC, HDTV, video
conferencing, and DSS is digital video compression. The great success of digital video
compression is mainly because of two factors. The state of the art...
A high-swing, high-linearity Class-AB CMOS
operational amplifier suitable for high speed
application is presented. It does not exhibit large-signal
slewing effects as do others; its output current
is limited by MOSFET aspect ratios and the total power
supply voltage. A rail-to-rail common-mode input range
is achieved by a topology which...
Environmental concerns have renewed the interest in electric vehicles. To gain
widespread use, electric vehicles will also have to offer good performance and be
reasonably priced. AC drive systems using modern semiconductors can provide
efficient operation at the required power levels, but their cost at present is still too
high....
With the advancement of technology, submicron CMOSonly process is available now for
Application Specific Integrated Circuits (ASICs). The high integration leads to the need for
high pin counts. However voltage supply and ground bounce due to many output drivers
switching at the same time is becoming a major problem. In...
An electro-dynamic Magnetic Levitation vehicular system has been
modelled and studied. In practice, a MagLev vehicle will consist of a
number of cars which are mechanically coupled to each other. It is
reasonable to assume that each of these cars will be independently
controlled with the help of a supervisory...
