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Digital Waveform Generation by Pete Symons

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1 Introduction to waveform generation

Systematic generation of periodic signals with electronically controlled frequency, phase, amplitude and waveform shape (or waveshape) is ubiquitous in nearly every electronic system. The sinusoidal local oscillator in a super-heterodyne radio receiver is a simple example of a signal source whose controllable frequency tunes the receiver. Another example is a step input waveform (e.g. a square wave) that allows us to measure the step response of a closed-loop control system (e.g. rise time, fall time, overshoot and settling time) under controlled excitation conditions. A more complex ‘staircase’ input waveform allows us to measure step response at particular points over the system's dynamic range and is useful ...

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