Comparators offer shorter delay times and a very high slew rate compared to an op amp. Despite what may appear as similarities, the two circuits are different animals with different applications.

In this circuit, one comparator generates a ramp waveform, and a second provides the feedback from the output voltage. The schematic in Figure 4 shows how this is implemented with two comparators.

A comparator is an electronic component that outputs different voltage results at the output by comparing the magnitude of the current or voltage at the two inputs. This article describes the ...