RMS of Common Waveforms
| Waveform | Equation | RMS |
|---|---|---|
| DC, constant | ||
| Sine wave | ||
| Square wave | ||
| Modified square wave | ||
| Triangle wave | ||
| Sawtooth wave | ||
| Pulse train | ||
| Notes: t is time f is frequency a is amplitude (peak value) D is the duty cycle or the percent(%) spent high of the period (1/f) {r} is the fractional part of r |
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Waveforms made by summing known simple waveforms have an RMS that is the root of the sum of squares of the component RMS values, if the component waveforms are orthogonal (that is, if the average of the product of one simple waveform with another is zero for all pairs other than a waveform times itself).
Read more about this topic: Root Mean Square
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