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Chapter 18 Oscillators

2. Objectives. State the function of the oscillator.Describe positive feedback used in the oscillatorExplain the Barkhausen criterionList the three requirements for proper oscillator operation.Describe the operating characteristics of the phase-shift and Wien-bridge RC oscillators.Describe the

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Chapter 18 Oscillators

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    1. 1 Chapter 18 Oscillators Pictures are redrawn (with some modifications) from Introductory Electronic Devices and Circuits By Robert T. Paynter

    2. 2 Objectives State the function of the oscillator. Describe positive feedback used in the oscillator Explain the Barkhausen criterion List the three requirements for proper oscillator operation. Describe the operating characteristics of the phase-shift and Wien-bridge RC oscillators. Describe the operation of the Colpitts and Hartley oscillators. Describe the operating principles of crystals and crystal-controlled oscillators.

    3. 3 Fig 18.1 Positive feedback.

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