9. Types of FSMs

Types of FSMs:

  • Mealy Machine: The output depends on both the current state and the input.
  • Moore Machine: The output depends only on the current state.

Design Steps:

  • State Diagram: Represent the states and transitions graphically.
  • State Table: Tabulate the current state, input, next state, and output.
  • State Encoding: Assign binary codes to each state.
  • Logic Design: Derive the logic equations for the next state and output.
  • Implementation: Use flip-flops and combinational logic to implement the FSM.

Design of Sequential Circuits

Design Steps:

  • Specification: Define the problem and the required behavior of the circuit.
  • State Diagram/Table: Create a state diagram or table to represent the sequence of states.
  • State Encoding: Assign binary codes to each state.
  • Flip-Flop Selection: Choose the type of flip-flop (D, JK, T, etc.) to use.
  • Derive Excitation Equations: Determine the input equations for the flip-flops.
  • Implement Combinational Logic: Design the combinational logic that drives the flip-flops and produces the output.
Verify the Design: Simulate the circuit to ensure it meets the specifications.