A strongly asymmetric waveform where one edge is much faster than the other. The traditional shape shows a gradual rise with a sharp drop (like the teeth of a saw). The reverse shape, a sharp spike followed by a slow exponential recovery, is characteristic of capacitor-discharge PEMF circuits. In that design, a pre-charged capacitor dumps current into the coil in a fast pulse that then decays as the energy dissipates. Both forms produce high dB/dt values on the sharp edge, generating strong induced electric fields in tissue across a broad range of frequencies.
The shape of each pulse is its waveform. A sine wave rises and falls smoothly; a square wave snaps between two levels; a triangle wave ramps up and down in straight lines; a sawtooth ramps up then drops sharply. The shape sets how sharply the field changes, which is what the timing measurements capture.
