Question

4. A three flip-flop shift register is shown below: K_2 Q_21 0 1 0 (a) If the flip-flops are initially loaded with the word [Q2 = 1, Q1 = 1, QO = 0], find out the words that will be generated after the next 6 clocks. [4 points] (b) By observing the output sequence at Q_0, identify the bit pattern that is being repeated. [2 points]

Answer 1

Given three Flip-flop shift syister LJO Qoh K2 cik Initial states → Q,= 1,Q,-1, Qo=0. PS (Present state) Q, Q Q, - PI (Present input) т, к, тук, Ток, Q Q Q Qo Q₂ Q NS (Next State) q, q, що After 1 at clock - sudaloda 0 1 0 1 10 to 0 11 pat clock 0 1 1 1 0 1 0 0 1 10 After the 3rd clock pulse states are repeated. 80, affer uth clock pulse states are 101. In sth ll 11 11 0 11 11 6th u 1 u 110 and so on. * If we observing the output sequence at Qo. the 3-bit pattern is repeated which is a 110110 110110 ----- CS Scanned with CamScanner

Explanation in → Present Inputs are assigned by looking in the shift register. like "J" input is Connected with "Q" & "ki" input is connected with Q. > → After assigning the all inputs we put the values in the inputs accosding to initial states which is shown in 1 row of table. After getting the input in different Flip-Flops they generated new output which is Next State 1. These process Continued till the initial state repeated. Here after 3rd clock pulse states are repeated. CS$canned with CamScanner