Electron Devices and Circuits: Unit V: (b) Oscillators
Oscillators: Introduction
• The operation of the feedback amplifiers in which the negative feedback is used, has been discussed earlier. In this chapter, a device which works on the principle of positive feedback is discussed. The device is called an Oscillator.
Introduction
•
The operation of the feedback amplifiers in which the negative feedback is
used, has been discussed earlier. In this chapter, a device which works on the principle
of positive feedback is discussed. The device is called an Oscillator.
Key
Point : An oscillator is a circuit which basically acts
as a generator, generating the output signal which oscillates with constant
amplitude and constant desired frequency.
•
An oscillator does not require any input signal. An electrical device,
alternator generates a sinusoidal voltage at a desired frequency of 50 Hz in
our nation but electronic oscillator can generate a voltage of any desired
waveform at any frequency. An oscillator can generate the output waveform of
high frequency gigahertz.
•
In short, an oscillator is an amplifier, which uses a positive feedback and
without any external input signal, generates an output waveform at a desired
frequency. This chapter explains the various types of oscillator circuits.
Review Question
1. What is oscillator ?
Electron Devices and Circuits: Unit V: (b) Oscillators : Tag: : - Oscillators: Introduction
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Related Subjects
Electron Devices and Circuits
EC3301 3rd Semester EEE Dept | 2021 Regulation | 3rd Semester EEE Dept 2021 Regulation