FINAL PROJECTS:
(Grads/Undergrads and then in alphabetical order)
Finding operating points of nonlinear circuits using homotopy methods:
Abstract:
Finding operating points of nonlinear circuits is one of the most
significant steps for circuit designers when simulating electronic circuits.
Homotopy methods have been developed over the last few decades to
help solve nonlinear circuits and equations. In this project,
we solve several nonlinear circuits using one homotopy method.
The circuits possess the feedback structure and, thus,
may have multiple operating points. The homotopy method has been
implemented using Matlab and was used to calculate operating points
of several nonlinear circuits.
Operational analysis, modeling, and demonstration of an IGBT-based power converter:
Abstract:
We investigate the insulated gate bipolar transistor
(IGBT) switching functional-block of a simple buck power converter in order
to explore the operation of popular switching power supply circuits.
Circuit analysis is performed to understand its basic operation and as a basis
for further investigations. We investigate potential nonlinear circuit behavior of
the IGBT switching stage through SPICE modeling and circuits simulations.
OrCADŽ PSPICE results are compared with measured results obtained
from a circuit prototyped by using available components.
PSpice and Matlab stimulation of Negative Resistance Circuit:
Abstract:
We stimulated negative resistance transistor circuits using Matlab and PSpice.
By choosing appropriate resistor values and biasing transistors to appropriate
operating points, the circuits perform a negative resistance function.
From the PSpice and Matlab simulations, we obtained the DC operating
point and generated graphs of the i-v characteristics so
that we could analyze the circuit graphically and numerically.