What is a differential counter?

A differential counter is a type of electronic circuit or system that counts the difference between two input signals or events, often used in digital electronics and signal processing. It typically compares two signals, such as in a dual-channel system, and outputs a count based on the discrepancies between them. This can be useful in applications like frequency counting, phase detection, or measuring changes in position. By focusing on the difference, it can reduce noise and improve accuracy in counting.