Build Your Own Transistor Radios: A Hobbyist's Guide to High-Performance and Low-Powered Radio Circuits

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McGraw Hill Professional, 11 de dez de 2012 - 473 páginas
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13. Oscillator circuits -- One-transistor oscillator -- Differential pair oscillator -- References -- 14. Mixer circuits and harmonic mixers -- Adding circuits versus mixing circuits -- Distortion can be a good thing (for mixing) -- Single-bipolar-transistor distortion -- Simple transistor mixer and its conversion transconductance -- Differential-pair mixer -- Harmonic mixer circuits -- Mixer oscillator circuits -- Conversion gain -- References -- 15. Sampling theory and sampling mixers -- Sampling signals as a form of muliplication or mixing -- Finite pulse-width signals -- Aliasing is a mixing effect -- Multiplexer circuits as balanced mixers -- Tradeoffs in performance of the mixers -- References -- 16. In-phase and quadrature (IQ) signals -- Introduction to suppressed-carrier amplitude modulation -- How i and q signals are generated -- Demodulating i and q signals -- I and q signals used in software-defined radios (SDRS) -- References -- 17. Intermediate-frequency circuits -- If amplifiers -- Gain-controlled if amplifiers -- Considerations of distortion effects on if amplifiers -- References -- 18. Detector/automatic volume control circuits -- Average envelope detectors -- Power detectors -- Synchronous detectors -- Iq detectors for am broadcast signals -- Measuring an average carrier or providing automatic volume control -- References -- 19. Amplifier circuits -- Introduction to operational amplifiers -- Amplifier characteristics -- Connecting multiple amplifiers for an amplifier system -- Practical considerations for using amplifiers -- References -- 20. Resonant circuits -- Simple parallel and series resonant circuits -- Resonant circuits in oscillators -- Examples of band-pass and band-reject filters -- References -- 21. Image rejection -- What is an image signal? -- Methods to reduce the amplitude of the image signal -- Analysis of an image-rejection mixer using i and q signals -- Analysis of the image-reject mixer -- Consequences of an imperfect 90-degree phase shifter on reducing the image signal -- References -- 22. Noise -- Sources of random electronic noise and some basic noise theory -- Paralleling transistors for lower noise -- Differential-pair amplifier noise -- Cascode amplifier noise -- Selecting op amps -- References -- 23. Learning by doing -- Update on the one-transistor superheterodyne radio -- Comments on sdr 40-meter front-end circuit -- Experimenting with mixers and using the spectran spectrum analyzer program -- Conducting experiments on op amps and amplifiers -- Experiments with a resonant circuit -- Thevenin-equivalent circuit -- Analyzing a bridge circuit -- Some final thoughts on the book -- References -- A. Appendix 1: parts suppliers -- Oscillator coils, intermediate-frequency (if) transformers, audio transformers -- Antenna coils -- Variable capacitors -- Crystal earphones -- Passive components, resistors, capacitors, fixed-valued inductors -- Crystals -- Ceramic resonators (~455 khz) -- Ceramic filters (~455 khz) -- Transistors, diodes, and integrated circuits -- Low-noise transistors and JFETs -- Loudspeakers -- B. Appendix 2: inductance values of oscillator coils and intermediate-frequency (if) transformers -- If transformer with internal capacitor removed -- C. Appendix 3: short alignment procedure for superheterodyne radios -- If transformer alignment -- Oscillator coil and trimmer capacitor adjustments

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Conteúdo

Chapter 1 Introduction
1
Chapter 2 Calibration Tools and Generators for Testing
13
Chapter 3 Components and HackingModifying Parts for Radio Circuits
19
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Ronald Quan is a member of SMPTE, IEEE, and the AES. He worked on the design of wideband FM detectors for an HDTV tape recorder at Sony Corporation, and a twice-color subcarrier frequency (7.16 MHz) NTSC vector-scope for measuring differential phase and gain for Macrovision, where he was a Principal Engineer. Ronald currently holds at least 65 US patents in the areas of analog video processing, low noise audio and video amplifier design, low distortion voltage controlled amplifiers, wide band crystal VCOs, video monitors, audio and video IQ modulation, audio and video scrambling, bar code reader products, audio test equipment, and video copy protection.

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