What is next state decoder?

A next state decoder is a digital circuit used in sequential logic designs, such as finite state machines (FSMs), to determine the next state based on the current state and input signals. It takes the current state and input values as inputs and activates the appropriate output line corresponding to the next state. This facilitates the transition between states in a controlled manner, enabling the system to react to inputs and progress through defined states in its operation. Next state decoders are essential for implementing state transitions in various applications, including digital controllers and processors.