A Direct Approach to Analog Filter Design
Authors
Khosravi, Parviz
Issue Date
1980-12
Type
Thesis
Language
en_US
Keywords
Direct filter , Computer modeling
Alternative Title
Abstract
A direct filter design approach is to approximate requirements of the desired filter, and realize the resultant function using given elements. Optimization of this method is to utilize a digital comuter to produce the approximation function into a standard format. This will turn the solution of filter design problem into operating a digital computer and use of some well described, vastly available, circuits. The aim of this thesis is to study aspects of above approach, mainly approximation stage, and develop a computer program to perform this step. To reach for this goal, an introduction to the basic filter and approximation concepts as well as the complete description of the application of approximation functions, the Butterworth functions in particular, to the ideal low-pass characteristics are given in chapters 1 and 2. Chapter 3, deals with frequency transformation principles which enable the low-pass prototype to be directly applied to other practical filter types. Finally, chapter 4 combines the results of chapters 1 through 3, to obtain the desired computer program. The program is written in standard ANSI FORTRAN 4 which should be compatible with most FORTRAN compilers, computes and prints the gain and phase of the desired filter at the specified frequencies and can be used for any filter It also type including LOW-PASS, HIGH-PASS BAND-PASS and BAND-REJECT filters.
Description
This thesis is being archived as a Digitized Shelf Copy for campus access to current students and staff only. We currently cannot provide this open access without the author's permission. If you are the author of this work and desire to provide it open access or wish access removed please contact the Wahlstrom Library to discuss permission.
Citation
P. Khosravi, "A Direct Approach to Analog Filter Design", Masters thesis, Dept. of Engineering, Univ. of Bridgeport, Bridgeport, CT, 1980.