It is the equivalent to a very high gain amplifier with well-balanced inputs and controlled output limits.
2.
As the founder of Fortin Amplification, Inc . he has forged a worldwide reputation for creating cutting edge high gain amplifier designs.
3.
The comparator is a very high gain amplifier with its plus input terminal connected for reference to 0.0 V . Whenever the negative input terminal is taken negative with respect the positive terminal of the amplifier the output saturates positive and conversely negative saturation for positive input.