The design of a preamplifier for use with a piezoelectric transducer is generally approached from the point of view that an extremely high input impedance is required to obtain low frequency response. However, piezoelectric transducers are essentially charge generators and this fact may be utilized in designing preamplifiers to be...
Conventional bi-polar transistors are inherently low input
impedance devices. Transistor amplifiers have been designed
which will present high input impedance, but the frequency response
is limited to low frequencies, hundreds of kilocycles.
This thesis investigates both field effect transistors and
positive feedback as applied to high input impedance wide band...
This thesis discusses the design and evaluation of an instrument
that can detect known signals in noise. This detector uses
two integrators to sense a difference in the received signal between
half-cycles of the known signal.
The detector is useful for sensing signals in the approximate
frequency range of 100...
Periodic signals hidden in noise may be detected by using
correlation techniques This thesis presents a study of how
correlation is approximated statistically, and carried out electronically.
The ability to detect periodic signals in noise, using correlation,
is justified mathematically in the first portion of the thesis.
The discussion is...
Wideband tunnel-diode amplifiers using common-base
transistor stages for isolation were investigated for
stability criteria, frequency response, and the effects
of temperature and voltage supply fluctuations. For the
first time the full frequency spectrum of a tunnel-diode,
from d-c to the gigahertz (GHz) range, was able to be
utilized in an...
Three synthesis methods for the realization of the
voltage transfer function by means of RC elements and
three different active devices are presented. These
three devices are a high-gain amplifier, a voltage controlled
voltage source (VCVS) and a negative immittance
converter (NIC). The VCVS and NIC as well as the...
This thesis deals with the output statistics of nonlinear devices.
It develops the classical output autocorrelation function in two dimensions
and extends the theory to three and four dimensions. Closed
form solutions for the output correlation function in two and three
dimensions are given for the full- and half-wave rectifier...
It is often necessary in communication systems to detect very
small signals that are buried in noise. One device used to accomplish
this is a lock-in amplifier. Initially the theory of operation is considered.
Then the circuit design of a low cost lock-in amplifier is
given. The amplifier, employing linear...
The purpose of this thesis is to apply the Canonical Correlation
Analysis (CCA) which belongs to the parametric methods for power
spectral estimation in the environments of either white noise or
colored noise. It is shown that optimal state space variables
belong to the range space of the canonical vectors...