{HEAD ~ The spectrum} of {TAIL ~ harmonic frequencies} of pulse width modulator output signal y is spread out to decrease peak energy levels of PWM output signal y 
{ HEAD ~ The spectrum } of { TAIL ~ harmonic frequencies } of pulse width modulator output signal y is spread out to decrease peak energy levels of PWM output signal y
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH