LTspice: Computing the Average or RMS Value of a Trace

The LTspice waveform viewer can integrate a trace to produce the average or RMS value over a given region.

To integrate a trace in the waveform viewer:

  1. Zoom in to the region of interest.
  2. Hold down the control key and click the label of the trace you want to integrate.

Based on the physical units of the data trace, LTspice IV displays a meaningful average for that type of data. For example, if the units are a voltage or current, LTspice IV displays the average and the RMS values. Otherwise, LTspice IV displays the average and integral of the data displayed in the waveform viewer. If you are plotting noise densities from a .noise simulation, LTspice IV shows total RMS noise.



Gabino Alonso

Gabino Alonso目前是Power by Linear™部门的战略营销总监。加入ADI公司之前,Gabino在凌力尔特、德州仪器、加州理工州立大学担任过市场营销、工程、运营和讲师等多个职位。他拥有加州大学圣巴巴拉分校电子和计算机工程硕士学位。