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Full-Text Articles in Engineering
Adjustable Low Frequency Servo Compensation Using Operational Amplifiers, Charles P. Partin
Adjustable Low Frequency Servo Compensation Using Operational Amplifiers, Charles P. Partin
Retrospective Theses and Dissertations
This paper defines a variable transfer function that is used to compensate for low frequency structural resonances in a turret so that stabilization of a closed loop servo system can be achieved. Three circuits for implementing this compensation are presented. They are: the feedforward three amplifier biquad, the summing four amplifier biquad, and the single amplifier biquad with pole-zero cancellation. Design equations allowing the engineer to go directly from the given transfer function to the actual component values are developed for each circuit. A comparison of the final circuit designs is also presented.
The Development Of New Filter Functions Based Upon Solutions To Special Cases Of The Sturm-Liouville Equation, Stephen Joseph Chapman
The Development Of New Filter Functions Based Upon Solutions To Special Cases Of The Sturm-Liouville Equation, Stephen Joseph Chapman
Retrospective Theses and Dissertations
Two common classes of filter functions in use today, Butterworth functions and Chebyshev functions, are based upon solutions to special cases of the Sturm-Liouville equation. Here, solutions to several other special cases of the Sturm-Liouville equation were used to develop filter functions, and the properties of the resulting filters were examined. The following functions were explored: Chebyshev functions of the second kind, untraspherical functions of the second and third kinds, Hermite functions, and Legendre functions. Filter functions were developed for each of the first five polynomials in each series of functions, and magnitude and phase responses were tabulated and plotted. …
A Simple Multicoupled Band-Pass Active Filter Design Employs Resistor Summing To Provide Multicoupling, Talal K. Chatila
A Simple Multicoupled Band-Pass Active Filter Design Employs Resistor Summing To Provide Multicoupling, Talal K. Chatila
Retrospective Theses and Dissertations
The purpose of this paper is to present a new design configuration for multicoupled band-pass filter based on Mason's loop rule, together with the negative feedback topology and to compare it with Leap Frog (LF) and Follow the Leader Feedback (FLF) design examples.
Multicoupled Bandpass Filter Design Using A Multiple Feedback Configuration, Robert J. Martin
Multicoupled Bandpass Filter Design Using A Multiple Feedback Configuration, Robert J. Martin
Retrospective Theses and Dissertations
In this paper, two methods for the design of active analog feedback bandpass filter pairs are examined. A third method is presented that does not use extra amplifiers for summation nor multicoupling. This third method uses identical bandpass amplifies and employs resistor summing to provide multicoupling. The name of this configuration is the "Dual Amplifier Bandpass Filter Employing Resistor Summing" (DABFERS). This configuration is economically attractive, has low sensitivity and better phase lag characteristics. In addition, third order prototypes are examined and a solution method for higher order prototypes is suggested.
A Comparison Of N-Path And Digital Filters For Band Pass Applications, Stephen Cooperman
A Comparison Of N-Path And Digital Filters For Band Pass Applications, Stephen Cooperman
Retrospective Theses and Dissertations
The classic problem of achieving high Q, band pass, inductorless filters has been traditionally attacked by applying active RC networks. This approach suffers from the faults of poor economy, lack of stability of performance with time and temperature, and high network performance sensitivity to component changes. The problem is reviewed from the aspect of applying techniques other than operational amplifier RC filters. The techniques presented are those of N-Path (switching) and Digital Filters. The underlying theory of both methods is explored and a design example for each of the techniques is presented. These designs are then compared on the basis …