HARTLEY OSCILLATOR The HARTLEY OSCILLATOR is an improvement over the Armstrong oscillator. Although its frequency stability is not the best possible of all the oscillators, the Hartley oscillator can generate a wide range of frequencies and is very easy to tune. The Hartley will operate class C with self-bias for ordinary operation. It will operate […]
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Wave-Generation and Wave-Shaping
Oscillators: Hartley oscillator and resistive-capacitive (rc) feedback oscillator.
HARTLEY OSCILLATOR The HARTLEY OSCILLATOR is an improvement over the Armstrong oscillator. Although its frequency stability is not the best possible of all the oscillators, the Hartley oscillator can generate a wide range of frequencies and is very easy to tune. The Hartley will operate class C with self-bias for ordinary operation. It will operate […]
Continue reading…
Oscillators: solid-state lc oscillators, feedback,types of feedback, configuration of oscillators, common-collector configuration, common-base configuration, common-emitter configuration and oscillator circuits.
SOLID-STATE LC OSCILLATORS As you have just studied, a basic oscillator can be broken down into three main sections: a frequency-determining device, an amplifier, and a feedback circuit. The frequency-determining device in an LC oscillator is usually an LC tank circuit. Although the tank circuit is normally found in the input circuit of an oscillator […]
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Oscillators: solid-state lc oscillators, feedback,types of feedback, configuration of oscillators, common-collector configuration, common-base configuration, common-emitter configuration and oscillator circuits.
SOLID-STATE LC OSCILLATORS As you have just studied, a basic oscillator can be broken down into three main sections: a frequency-determining device, an amplifier, and a feedback circuit. The frequency-determining device in an LC oscillator is usually an LC tank circuit. Although the tank circuit is normally found in the input circuit of an oscillator […]
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Oscillators: frequency stability, amplitude stability and Armstrong oscillator.
FREQUENCY STABILITY The FREQUENCY STABILITY of an oscillator is a measure of the degree to which a constant frequency output is approached. The better the frequency stability, the closer the output will be to a constant frequency. Frequency INSTABILITY (variations above and below the desired output frequency) may be caused by transistor characteristics or […]
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Oscillators: frequency stability, amplitude stability and Armstrong oscillator.
FREQUENCY STABILITY The FREQUENCY STABILITY of an oscillator is a measure of the degree to which a constant frequency output is approached. The better the frequency stability, the closer the output will be to a constant frequency. Frequency INSTABILITY (variations above and below the desired output frequency) may be caused by transistor characteristics or […]
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Oscillators: classification of oscillators (generators), the basic oscillator and sine-wave oscillator.
OSCILLATORS LEARNING OBJECTIVES Upon completion of this chapter you will be able to: 1. List the two broad classifications of oscillators (wave generators). 2. Identify the three frequency-determining devices for sine-wave oscillators. 3. Describe the differences between series-fed and shunt-fed oscillators. 4. Explain how the crystal is equivalent to the series and parallel LC circuit. […]
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Oscillators: classification of oscillators (generators), the basic oscillator and sine-wave oscillator.
OSCILLATORS LEARNING OBJECTIVES Upon completion of this chapter you will be able to: 1. List the two broad classifications of oscillators (wave generators). 2. Identify the three frequency-determining devices for sine-wave oscillators. 3. Describe the differences between series-fed and shunt-fed oscillators. 4. Explain how the crystal is equivalent to the series and parallel LC circuit. […]
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Answers to questions and summary of tuned circuits.
SUMMARY This chapter introduced you to the principles of tuned circuits. The following is a summary of the major subjects of this chapter. THE EFFECT OF FREQUENCY on an INDUCTOR is such that an increase in frequency will cause an increase in inductive reactance. Remember that XL = 2pfL; therefore, XL varies directly with frequency. […]
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Answers to questions and summary of tuned circuits.
SUMMARY This chapter introduced you to the principles of tuned circuits. The following is a summary of the major subjects of this chapter. THE EFFECT OF FREQUENCY on an INDUCTOR is such that an increase in frequency will cause an increase in inductive reactance. Remember that XL = 2pfL; therefore, XL varies directly with frequency. […]
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