The analog comparator designed with opamp will usually have a finite offset in its terminals.
So the minute difference voltage in its input terminals is best depicted in the comparator output only if the input signal is linearly increasing.
Ramp is one such signal and we can have the comparator's output switched to V++ exactly where the ramp input crosses the reference voltage (considering without offset)
Dear baby_1
Hi
The ramp or triangular wave are , the best things to create PWM and SPWM . and the reason , is , in the spectrum !
Best Wishes
Goldsmith