EMI Filter Design, 3rd Edition

14Waves as Noise Sources

The waves (transient) more commonly encountered within systems are discussed in this chapter. These waves are not as pure as drawn here; some parasitic oscillations from the transformer and other components will be superimposed on the waveforms. In real-world observation, these waveforms have rise and fall times due to parasitic effects; however, they are shown in the text as pure step functions that are impossible to achieve. Each voltage, or current, waveform is derived from the equivalent Fourier equations.

14.1 Spike

Voltage and current spikes are one of the common waveforms or noise sources encountered in electronic circuits, as shown in Figure 14.1. Voltage spikes are short-duration impulses in excess of the normal ...