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CHARACTERIZATION AND APPLICATIONS OF RESONANT PIN DIODE NETWORKS IN MICROSTRIP
Title
CHARACTERIZATION AND APPLICATIONS OF RESONANT PIN DIODE NETWORKS IN MICROSTRIP.
Creator
Ponce de Leon, Lorenzo Angel., Florida Atlantic University, Graham, Peter
Abstract/Description
PIN diodes and microstrip have found widespread use in modern microwave systems. A design theory for the design of microwave PIN diode switches and limiters is presented. Resonant mi crostrip transmission line networks are shown to improve the performance of packaged diodes. A systematic approach is used to analyze the transmission line networks. Four types of resonant diode switches are presented: an unmatched reverse mode switch, a matched reverse mode switch, a series forward mode switch,...
Show morePIN diodes and microstrip have found widespread use in modern microwave systems. A design theory for the design of microwave PIN diode switches and limiters is presented. Resonant mi crostrip transmission line networks are shown to improve the performance of packaged diodes. A systematic approach is used to analyze the transmission line networks. Four types of resonant diode switches are presented: an unmatched reverse mode switch, a matched reverse mode switch, a series forward mode switch, and a shunt forward mode switch. The utility of this approach is illustrated by designing and testing several PIN diode modules at both C and X-Band.
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Date Issued
1984
PURL
http://purl.flvc.org/fcla/dt/14194
Subject Headings
Diodes, Switching, Microwave communication systems, Microwave wiring, Microwave transmission lines
Format
Document (PDF)
NOISE CONSIDERATIONS IN DIGITAL SYSTEMS
Title
NOISE CONSIDERATIONS IN DIGITAL SYSTEMS.
Creator
FENNELL, ROBERT DEWAYNE., Florida Atlantic University, Graham, Peter
Abstract/Description
The use of digital circuits in incre asingly diverse applications and environments has greatly increased the probability of electromagnetic interference in digital machines. The source and control of noise in digital systems have become major considerations in hardware design. This paper addresses these problems and their solutions. The noise immunities of various semiconductor families are compared showing design tradeoffs. The effects of transmission line reflections on digital wave forms...
Show moreThe use of digital circuits in incre asingly diverse applications and environments has greatly increased the probability of electromagnetic interference in digital machines. The source and control of noise in digital systems have become major considerations in hardware design. This paper addresses these problems and their solutions. The noise immunities of various semiconductor families are compared showing design tradeoffs. The effects of transmission line reflections on digital wave forms are analyzed. The means for calculating interference between conductors (crosstalk) are shown with appropriate approximations. The effects of shielding conductors and circuitry are explored with formulas for near field calculations shown. Proper grounding and power supply decoupling methods are shown to be paramount to proper system design. The paper ends with an approximate noise analysis of a simple computing machine.
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Date Issued
1978
PURL
http://purl.flvc.org/fcla/dt/13915
Subject Headings
Noise control, Digital electronics
Format
Document (PDF)
HIGH EFFICIENCY POWER AMPLIFIER DESIGN
Title
HIGH EFFICIENCY POWER AMPLIFIER DESIGN.
Creator
JONES, LEE JAMES., Florida Atlantic University, Graham, Peter
Abstract/Description
Classes of operation of solid state power amplifiers are surveyed with an emphasis on high efficiency radio frequency applications. Classes A through H and S are covered, with the first three classes combined in a unified analysis. Time domain analyses of the switched-mode classes, D through S, include the effects of stray reactances, switch transition times, and load variations. For class E, a point of optimum operation is derived, and component values are determined assuming optimum...
Show moreClasses of operation of solid state power amplifiers are surveyed with an emphasis on high efficiency radio frequency applications. Classes A through H and S are covered, with the first three classes combined in a unified analysis. Time domain analyses of the switched-mode classes, D through S, include the effects of stray reactances, switch transition times, and load variations. For class E, a point of optimum operation is derived, and component values are determined assuming optimum operation. The multi-resonator and transmission line forms of class F are analyzed. In the last section, audio amplifier and modulator applications of classes G, H, and S are discussed. The characteristics of all the classes of power amplifiers discussed are summarized in a table at the end of the paper.
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Date Issued
1985
PURL
http://purl.flvc.org/fcla/dt/14276
Subject Headings
Power amplifiers
Format
Document (PDF)
BASIC NODAL ANALYSIS PROGRAMS WITH OPTIMIZATION, SENSITIVITY AND TOLERANCE ANALYSES
Title
BASIC NODAL ANALYSIS PROGRAMS WITH OPTIMIZATION, SENSITIVITY AND TOLERANCE ANALYSES.
Creator
TIMMONS, RICHARD PAUL., Florida Atlantic University, Graham, Peter, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Collections of BASIC subroutines are developed to perform non-general circuit analyses. These subroutines are used to evaluate the manufacturability of a functionally trimmed thick film hybrid circuit. Nodal, sensitivity, and tolerance analyses are used to evaluate the effectiveness of the functional trim algorithm, and an optimization procedure to alter the nominal circuit parameter values for adequate margins. The computer programs are not user-interactive, and the user has to write a...
Show moreCollections of BASIC subroutines are developed to perform non-general circuit analyses. These subroutines are used to evaluate the manufacturability of a functionally trimmed thick film hybrid circuit. Nodal, sensitivity, and tolerance analyses are used to evaluate the effectiveness of the functional trim algorithm, and an optimization procedure to alter the nominal circuit parameter values for adequate margins. The computer programs are not user-interactive, and the user has to write a separate program to incorporate the various subroutines. The pro6rams are written for use on the HP9835A desktop computer. The component element types discussed are limited to resistors, capacitors, and voltage controlled current sources. Nodal analysis is performed by LU factorization techniques, and sensitivity analysis by the adjoint network approach. Circuit frequency response optimization is presented usiag the Fletcher Powell minimization procedure and quadratic polynomial fitting. A Monte Carlo tolerance analysis routine is developed.
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Date Issued
1983
PURL
http://purl.flvc.org/fcla/dt/14162
Subject Headings
Thick-film circuits--Computer programs, Thick-film circuits--Testing
Format
Document (PDF)
PRECISION TC SYSTEM FOR MEASURING ACTIVITY DIPS OF QUARTZ CRYSTALS
Title
PRECISION TC SYSTEM FOR MEASURING ACTIVITY DIPS OF QUARTZ CRYSTALS.
Creator
Peterson, Vance Howard, Florida Atlantic University, Graham, Peter, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
There is an increasing market demand for quartz crystals which exhibit minimal activity dip or frequency anomalies over a predefined temperature range. Characterization of the frequency vs temperature (f-T) activity dip profiles of these tight tolerance crystals is best carried out using a system which has been expressly designed for such a purpose. Frequency measurement accuracy and reliable temperature control must be established in the system, along with its being compatible with a...
Show moreThere is an increasing market demand for quartz crystals which exhibit minimal activity dip or frequency anomalies over a predefined temperature range. Characterization of the frequency vs temperature (f-T) activity dip profiles of these tight tolerance crystals is best carried out using a system which has been expressly designed for such a purpose. Frequency measurement accuracy and reliable temperature control must be established in the system, along with its being compatible with a computer controlled production or engineering enviornment. This thesis will present design and implementation details for a system with the aformentioned objective of enabling the generation of accurate crystal activity dip data. The system will provide the user with up-to-date facilities for meeting the temperature testing requirements of tight tolerance crystals.
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Date Issued
1986
PURL
http://purl.flvc.org/fcla/dt/14343
Subject Headings
Quartz crystals, Oscillators, Crystal
Format
Document (PDF)
OSCILLATOR NOISE REDUCTION THROUGH THE USE OF NEGATIVE FEEDBACK
Title
OSCILLATOR NOISE REDUCTION THROUGH THE USE OF NEGATIVE FEEDBACK.
Creator
KALTENECKER, ROBERT S., Florida Atlantic University, Graham, Peter, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
It has been conjectured that the addition of negative feedback in an oscillator can reduce the noise generated at frequencies close to the oscillation frequency f0. In this thesis the noise of a bipolar transistor used in a Hartley oscillator configuration is measured for different values of unbypassed emitter resistance. It is found that the noise is substantially reduced as the negative feedback introduced by the emitter resistance is increased. A detailed noise analysis is included, the...
Show moreIt has been conjectured that the addition of negative feedback in an oscillator can reduce the noise generated at frequencies close to the oscillation frequency f0. In this thesis the noise of a bipolar transistor used in a Hartley oscillator configuration is measured for different values of unbypassed emitter resistance. It is found that the noise is substantially reduced as the negative feedback introduced by the emitter resistance is increased. A detailed noise analysis is included, the results of which predict t he observed reduction in the oscillator noise. The oscillation frequency of the test oscillator is approximately 50 Mhz, but the results are general and can be applied at any frequency. Included are two listings of computer programs that were u sed to perform the noise analysis.
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Date Issued
1985
PURL
http://purl.flvc.org/fcla/dt/14278
Subject Headings
Feedback (Electronics), Noise--Measurement
Format
Document (PDF)