RMS Lim/Exp

This block implements the code found here in the Spin Semiconductor Free Programs.

It looks like it limits the input signal to -12 dB FS. The tones shown below are at 110, 440, and 2200 Hz. Top trace is input, bottom trace is output.

Linear Scale

Log scale

The expansion can be seen in the next image. The input signal (top) is white noise at 10 dB steps from -60 to 0 dB FS.

Expansion and limiting ranges.