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Phase-Locked and Frequency-Feedback Systems: Principles and Techniques presents the operating principles and methods of design of phase-locked and frequency-feedback systems. This book is divided into 10 chapters that provide step-by-step design procedures and graphical aids, with illustrations bearing on real problems experienced in these systems. This work specifically tackles the application of these systems as FM demodulators with lowered thresholds. Chapters 1 and 2 deal briefly with the elements of linear systems, feedback theory, and noise, providing the minimum background for the material presented in the remainder of the text. Chapter 3 describes the characteristics of the major components that comprise the loops and the performance of the conventional and multi-loop FM demodulators. Chapters 4 to 7 present the basic describing equations and design for the FM feedback (FMFB) and phase-locked loop (PLL). These chapters further illustrate step-by-step design procedures with performance characteristics for low-threshold angle demodulation using typical design examples. Chapter 8 highlights the design principles, which are extended to the design of advanced demodulators featuring demodulation thresholds lower than those of the simple PLL or FMFB. Chapter 9 focuses on digital FM demodulation and PLL applications other than FM demodulation. Lastly, Chapter 10 presents the methods of testing and evaluating loop performance. Undergraduate and graduate level students, as well as practicing engineers, will find this book invaluable.
Language
Place of publication
Publishing group
Elsevier Science & Techn.
ISBN-13
978-0-323-15125-2 (9780323151252)
Schweitzer Classification
PrefaceAcknowledgmentsGlossary of Terms1 Introduction 1.1. Historical Development 1.2. Organization of the Book References2 Review of Concepts 2.1. Network Theory 2.2. Feedback Theory 2.3. Representation and Properties of Noise 2.4. Trigonometric Identities References3 Loop Components and Systems Considerations 3.1. Introduction 3.2. Limiter-Discriminator 3.3. Low-Threshold Demodulation 3.4. Filtering of FM Carriers 3.5. Voltage-Controlled Oscillator 3.6. Phase Detectors References4 FM Feedback Loop Principles 4.1. Operational Principles 4.2. The Linear Equivalent Circuit 4.3. Linear Operation of the Loop 4.4. Nonlinear Operation 4.5. Effect of Excess Delay References5 Phase-Locked Loop Principles 5.1. Operational Principles 5.2. The Linear Equivalent Circuit 5.3. Linear Operation 5.4. Nonlinear Operation 5.5. Excess Delay and Minimum Noise Bandwidth References6 Design of Phase-Locked Loops for FM Demodulation 6.1. FM Improvement Region 6.2. Distortion-Limited Region 6.3. Threshold-Limited Region 6.4. Step-by-Step Design Procedure and Examples References7 Design of Frequency-Feedback Loops for FM Demodulation 7.1. FM Improvement Region 7.2. Distortion-Limited Region 7.3. Threshold-Limited Region 7.4. Step-by-Step Design Procedure and Examples References8 Design of Compound and Multiple Loops for Low-Threshold Demodulation 8.1. General Design Considerations 8.2. The FMFB-PLL Compound Loop 8.3. The FMFB-FMFB Compound Loop 8.4. Extended-Range Phase-Locked Demodulator (ERPLD) and the FMFB-ERPLD References9 Digital FM and Other PLL Applications 9.1. Introduction to Digital FM Systems 9.2. Binary Error Rates with Limiter-Discriminator Demodulation 9.3. Binary FM Demodulation with Angular-Feedback Demodulators 9.4. Other PLL Applications References10 Testing and Evaluation Procedures 10.1. Component Tests 10.2. Loop Tests 10.3. Systems Tests of FM Demodulators ReferencesAppendix A Derivation of Angle-Modulation Improvement EquationsAppendix B Derivation of the Discriminator Baseband ResponseAppendix C The Ideal DemodulatorAppendix D Varactor VCO DistortionAppendix E Baseband-Equivalent Response of a Single-Tuned Circuit to a Small-Index Off-Tuned FM CarrierAppendix F Calculation of Minimum Noise Bandwidth and Loop Filter Zero Constant for the FMFBBibliographyAuthor IndexSubject Index