3) Consider a sequential circuit with one input and one output. The circuit cont

Question

3) Consider a sequential circuit with one input and one output. The circuit contains a 3-bit shift register with a synchronous Clear (Clr) input. The black-box view of the sequential circuit, the 3 bit shift register and the operation table of the shift register are as follows 02 Cir C Store 0, 0,0 (Clear) 0 0 Not stored The shift register is cleared (stored 0) when its Clr input is 1 and there is a positive clock edge. If the CIr input is inactive, the shift register shifts and so does not need a shift input The implementation of this sequemtial circuit with ashift register and a2-bit up counter is as fol- 02 01 t10 1 t 1 Detemine what this sequential circuit does (the purpose) by continuing with the above table and howing the valaes for 12 clock periods If you cannot figure out the purpose, just write " can not determine the purpose.

Explanation / Answer

The equation of f=d.e

Z=x'.a'.b'.c'

hence the register shifts the value from Q0 to Q1,Q1 to Q2 and stores x in Q0

and clears the a,b,c whenever f is 1 hence the table is drawn

starting from t1

The purpose can be said to clear the output every four clock cycles and the final input z is depending of present state as well as the inputs hence it is a mealy machine.

Please do give this answer a thumbs up and if any doubts leave a comment.

a b c d e f z 0 0 0 0 1 0 1 0 0 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 0 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 1 0 0 0 0 1 1 1 1 1 0

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