What is NRZ?

Non-Return-to-Zero (NRZ) is a line code used in communication systems where the signal representing a 1 bit maintains a constant voltage level for the entire bit duration, and the signal representing a 0 bit maintains a different constant voltage level (or the absence of a voltage) for the entire bit duration. NRZ encoding does not return to a zero voltage level between consecutive bits, which can lead to synchronization issues if there are long sequences of the same bit value. It is commonly used in serial communication and data storage applications.