Electrical Engineering › Section O · Pulses, nonsinusoidal signals, and system analysis › Topic O.3
Fourier series and nonsinusoidal circuits
Square waves, rectifier outputs and distorted mains currents are not sinusoids, yet every periodic waveform can be built from them. The Fourier series breaks such a waveform into a dc level and harmonics, so the ac methods of earlier sections handle it one frequency at a time.
In this topic
- Any periodic wave is a sum of sinusoids
- The Fourier series
- Symmetry saves work
- Worked example: a square wave
- Other common waveforms
- Circuit response by superposition
- Worked example: filtering a square wave
- Rms value and power
- Adding nonsinusoidal waveforms
- Common mistakes to avoid
- Key takeaways
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