Moore Machine - Comparison

Comparison

Output values :

  • A Mealy machine is determined both by its current state and by the values of its inputs.
  • A Moore machine is determined solely by its current state.

The number of states in a Moore machine will be greater than or equal to the number of states in the corresponding Mealy machine. This is due to the fact that each transition in a Mealy machine can be associated with a corresponding, additional state mapping the transition to a single output in the Moore machine, hence turning a possibly partial machine into a complete machine.

The diagram :

  • for a Moore machine associates an output value with each state
  • for a Mealy machine associates an output value with each transition edge

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