Digital Logic
Q151.
A positive edge-triggered D flip-flop is connected to a positive edge-triggered JK flip-flop as follows. The Q output of the D flip-flop is connected to both the J and K inputs of the JK flip-flop, while the Q output of the JK flip-flop is connected to the input of the D flip-flop. Initially, the output of the D flip-flop is set to logic one and the output of the JK flip-flop is cleared. Which one of the following is the bit sequence (including the initial state) generated at the Q output of the JK flip-flop when the flip-flops are connected to a free-running common clock? Assume that J=K=1 is the toggle mode and J=K=0 is the state-holding mode of the JK flip-flop. Both the flip-flops have non-zero propagation delays.Q152.
What are the final values of Q1 and Q0 after 4 clock cycles, if initial values are 00 in the sequential circuit shown below:Q153.
In a three stage counter, using RS flip flops what will be the value of the counter after giving 9 pulses to its input ? Assume that the value of counter before giving any pulses is 1 :Q154.
Consider a 4-bit Johnson counter with an initial value of 0000. The counting sequence of this counter isQ155.
The above synchronous sequential circuit built using JK flip-flops is initialized with Q_{2}Q_{1}Q_{0} = 000. The state sequence for this circuit for the next 3 clock cycles isQ156.
Let k = 2^{n} . A circuit is built by giving the output of an n-bit binary counter as input to an n-to-2^{n} bit decoder. This circuit is equivalent to aQ157.
In an RS flip-flop, if the S line (Set line) is set high (1) and the R line (Reset line) is set low (0), then the state of the flip-flop is :Q158.
Consider the following circuit involving three D-type flip-flops used in a certain type of counter configuration. If all the flip-flops were reset to 0 at power on, what is the total number of distinct outputs (states) represented by PQR generated by the counter?Q160.
In the sequential circuit shown below, if the initial value of the output Q_{1}Q_{0} is 00, what are the next four values of Q_{1}Q_{0} ?