Specific characteristics of a PWM signal based on sawtooth voltage

Abstract

Here is given the explanation why a sine which is con-verted into a pulse-width signal (also known as “PWM signal”) due to sawtooth voltage has less first harmonic's error than a pulse-width signal being gotten via calculation depending on the signal's level at the middle of a period (on this period, there forms a signal's impulse with pulse-width modulation.), in its area or RMS value of the signal at a period.