Transcription of Chapter 16 Oscillator Circuits and Applications
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Chapter 16 Oscillator Circuits and Applications
- 441 - Chapter 16 Oscillator Circuits and Applications _____ Introduction Oscillator contains circuit that generates an output signal without necessity of an input signal. It is a circuit that produces a repetitive waveform on its output with only dc supply as input. The Oscillator can be sinusoidal or non-sinusoidal type. They can be used in many Applications such as communication and digital system. Oscillator operation is based on positive feedback whereby portion of the output signal Vout is feedback without phase change. This shall mean that there is no phase difference between the input and feedback signal. Many Oscillator Circuits can be designed using operational amplifier circuit. It can generate various types of waveform with no input other than dc supply. These are known as signal generators or oscillators.
programmable unijunction transistor PUT plus the forward voltage V F of the diode, which is 0.7V, the PUT is conducting causing the capacitor to discharge and output voltage drop abruptly to the forward voltage V F of the programmable unijunction transistor PUT. The period T of the wave is T = V RC V V in P −F (16.4)
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