Difference between Mealy Machine and Moore machine

What are the major differences between Mealy Machine and Moore machine?

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Moore machines and Mealy machines are two different types of computing machines that can be used to model the behavior of a computer.

The main difference between these two types is that a mealy machine can produce multiple outputs for a single input while a Moore machine will produce only one valid production at any given time.

Before we move to the differences, let’s understand what are Mealy Machine and Moore machine:

  • Mealy Machine: Mealy machines are state-dependent, meaning that they can change their output depending on the current state of the machine.
  • Moore machine: Moore machine is a concept in computer science that describes a system with a finite state machine and an input.

Now, let’s move to Mealy Machine vs Moore machine:

Major differences between Mealy Machine and Moore machine

Mealy Machine Moore machine
The amount of hardware is less required to design it. The amount of hardware is more important to design it.
Its output is placed on transition. Its output is placed on state.
This machine needs fewer states for the implementation of the same function. This machine has a more significant number of states for the implementation of the same function.

That’s it.

Note that sometimes, the question might also be asked as “distinguish between Mealy Machine and Moore machine”.

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Final words

So we can conclude that the Mealy machine and the Moore machine are two similar types of machines. They are both sequential machines, which means they process information sequentially. The difference between them is in the way that they process information.

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