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Practical Electronics for Inventors, Third Edition by Paul Scherz

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CHAPTER 10
Oscillators and Timers
Within practically every electronic instrument there is an oscillator of some sort. The task of the oscillator is to generate a repetitive waveform of desired shape, frequency, and amplitude that can be used to drive other circuits. Depending on the application, the driven circuit(s) may require either a pulsed, sinusoidal, square, sawtooth, or triangular waveform.
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FIGURE 10.1
In digital electronics, squarewave oscillators, called clocks, are used to drive bits of information through logic gates and flip-flops at a rate of speed determined by the frequency of the clock. In radio circuits, high-frequency sinusoidal ...

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