March 1996
Intermediate to advanced
512 pages
12h 49m
English
Content preview from Op Amps: Design, Application, and Troubleshooting, 2nd Edition
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CHAPTER FOUR
Oscillators
4.1 OSCILLATOR FUNDAMENTALS
An oscillator is essentially an amplifier that produces its own input. That is, if we connect an oscillator circuit to a DC power supply, it will generate a signal without having a similar signal available as an input. One of the most fundamental ways to classify oscillator circuits is by the shape of the waveform generated. In this chapter, we will study oscillator circuits that produce waveforms such as sinewave, rectangular wave, ramp wave, and triangular wave.
In general, in order for a circuit to operate as an oscillator, three basic factors must be provided in the circuit. They are
1. Amplification
2. Positive feedback
3. Frequency determining network
Suppose that many random signal ...
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