What is the limiter?
Limiter (Limiter) is a circuit that can flatten the amplitude of a signal voltage within a defined range, also known as a clipper. The function of the limiter circuit is to limit the amplitude of the output signal to a certain range, that is, when the input voltage exceeds or falls below a certain reference value, the output voltage is limited to a certain level (called a slice level). And no longer change with the input voltage.