waveform 1910 of FIG. 19E. The first three sinusoidal components of waveform 1910 (FIG. 19E) are depicted as waveforms 1912 a, b, & c of FIG. 19F and waveforms 1914 a, b, & c of FIG. 19G. (In the examples of FIGS. 19F & G, the three sinusoidal components are shown separately.