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1 results

  • 7 - Oscillators

  • Dennis L. Eggleston, Occidental College, Los Angeles
  • Book:
    Basic Electronics for Scientists and Engineers
    Published online:
    23 December 2025
    Print publication:
    20 November 2025, pp 192-220

  • Summary

    Oscillator circuits, categorized into relaxation and sinusoidal types, are introduced. Three examples of relaxation oscillators are given and analyzed: the SCR sawtooth, the transistor astable, and the 555 astable. Monostable operation of the 555 timer is also discussed. For sinusoidal oscillators, examples include a transistor RC, an op-amp Wien bridge, a Hartley, and a Pierce oscillator. Oscillator stability is discussed. Electromagnetic communications (AM and FM) are discussed as applications of oscillators.