Several subsets of the general sequential circuit model Excitation Variables E=f(I INPUT(t)- Combinational H(E) Memory Combinational OUTPUT(O) f(s,E Moore sequential circuit model Excitation Variables E=f(,Sy INPUT(t) Combinational Memory Combinational OUTPUT(O) State Variables Mealy sequential circuit modelSeveral Subsets of the general sequential circuit model Excitation Variables Memory M State Variables CLK (E) Combinational Transform (f) INPUT(t) （S） Combinational Logic （g） OUTPUT(O) Excitation Variables Memory M State Variables CLK (E) Combinational Transform (f) INPUT(t) （S） Combinational Logic （g） OUTPUT(O) Moore sequential circuit model Mealy sequential circuit model E=f(I,St ) St+1=f(St ,E) O=g(St ) E=f(I,St ) St+1=f(St ,E) O=g(I,St )