Comparator topologies

[kimmyo6]

Hello,

What type of comparator topology is this? I though that at least the comparator itself was dynamic, but after a review on several topologies, I'm confused. Hybrid?

Thanks.

 

[BradtheRad]

The left side looks like a long-tail pair operating as a normal differential detector.

The cross-biased arrangement M6 M7 creates an SR flip-flop. 'Latch' at M12 describes a storage function which preserves the state (hi or lo) coming from the left whenever M12 operates several transistors which perform storage.

The buffer IC's provide a few more mA if needed.

This comparator is able to act as a logic probe. One brief pulse (charge of state) may go unnoticed however this system serves to indicate one or more such pulses did occur.