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Build your own transistor radios : a hobbyist's guide to high-performance and low-powered radio circuits /
Provides a guide to designing and constructing transistor radios, including such topics as choosing components, troubleshooting, and sampling.
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
New York, N.Y. :
McGraw-Hill Education,
[2013]
|
| Edición: | First edition. |
| Colección: | McGraw-Hill's AccessEngineering.
|
| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- A. About the author
- B. Preface
- C. Acknowledgments
- 1. Introduction
- Tuned radio-frequency (TRF) radios
- Regenerative radio
- Reflex radio
- Superheterodyne radio
- Software-defined radio front-end circuits
- Comparison of the types of radios
- 2. Calibration tools and generators for testing
- Alignment tools
- Test generators
- Inductance meter
- Capacitance meter
- Oscilloscopes
- Radio frequency (RF) spectrum analyzers
- Where to buy the tools and test equipment
- 3. Components and hacking/modifying parts for radio circuits
- Antenna coils
- Variable capacitors
- Transistors
- Earphones
- Speakers
- Passive components
- Vector and perforated boards
- Hardware
- Parts suppliers
- 4. Building simple test oscillators and modulators
- The continuous-wave signal
- The amplitude-modulated signal
- First project: a CW RF test oscillator
- Modulator circuit for the CW generator
- Alternate circuits
- 5. Low-power tuned radio-frequency radios
- Design considerations for TRF radios
- Improving sensitivity and/or selectivity via antenna coils or circuits
- First design of TRF radio
- Variation of the design (alternate design of the TRF radio)
- Author's earlier TRF designs
- 6. Transistor reflex radios
- Motivation behind amplifying both radio-frequency and audio-frequency signals
- One-transistor TRF reflex radio
- Multiple-transistor reflex radio circuit
- 7. A low-power regenerative radio
- Improving sensitivity by regeneration
- Improving selectivity by Q multiplication via regeneration
- Design considerations for a regenerative radio
- 8. Superheterodyne radios
- Commercially made transistorized superheterodyne radios
- A four-transistor radio schematic
- An eight-transistor radio
- Alternative oscillator and antenna coil circuit
- An item to note
- 9. Low-power superheterodyne radios
- Design goals for low power
- Low-power oscillator, mixer, and intermediate-frequency circuits
- Low-power detector and audio circuits
- "First" design of a low-power superheterodyne radio
- Alternative low-power superheterodyne radio design
- Photos of low-power am superheterodyne radios
- 10. Exotic or "off the wall" superheterodyne radios
- A one-transistor superheterodyne radio
- Design considerations for a one-transistor superheterodyne radio
- A two-transistor superheterodyne radio
- 11. Inductor-less circuits
- Ceramic filters
- Gyrators (aka simulated or active inductors)
- Inductor-less (aka coil-less) superheterodyne radio
- 12. Introduction to software-defined radios (SDRS)
- Sdr front-end circuits, filters, and mixers
- Phasing circuits for 0- and 90-degree outputs for I and Q signals
- Multipliers for generating 0- and 90-degree phases
- Example radio circuits for software-defined radios
- Second SDR front-end circuit for the 40-meter amateur radio band.
- 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.