a. What is a flip-flop? Fill in the state table and write the state equation of JK flip-flop.Definition:KQ(t+1)State equation:b. If the present state of a JK flip-flop is 1 and the values of the inputs are J=0 and K =1, whatill be the next state for thflip-flop? Explain your answer.C.What is a shift register? Why do we use registers?d. Mention the modes of operation of a shift register.e. How many T flip-flops are needed if we want to store 6Bytes of information in a shiftregister at a time? Explain your answer.f. What is the difference between synchronous inputs and asynchronous inputs in a flip-flop?

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Engineering

Electrical Engineering

What is a flip-flop?

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter22: Sequence Control

Section: Chapter Questions

Problem 6SQ: Draw a symbol for a solid-state logic element AND.

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Concept explainers

Latches and Flip Flop

Just like logic gates, the latches and flip-flops are the important elements of an electronic circuit. The logic gates form the important part of combinatorial circuits, while the latches and flip-flops form the essential part of a sequential circuit. Sequential circuits form the important concept of automata theory in electronics and electrical engineering, these circuits are a kind of logic circuit whose output depends on both present input and past inputs, that is, the input history.

Question

a. What is a flip-flop? Fill in the state table and write the state equation of JK flip-flop.
Definition:
K
Q(t+1)
State equation:
b. If the present state of a JK flip-flop is 1 and the values of the inputs are J=0 and K =1, what
ill be the next state for th
flip-flop? Explain your answer.
C.
What is a shift register? Why do we use registers?
d. Mention the modes of operation of a shift register.
e. How many T flip-flops are needed if we want to store 6Bytes of information in a shift
register at a time? Explain your answer.
f. What is the difference between synchronous inputs and asynchronous inputs in a flip-
flop?

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Design a 6-bit counter with control input using flip-flops. Every hour pulseIt should be a design that will increase or decrease by 4 when it arrives. Control input increment orwill determine the decrease. Increasing when control input is 0, decreasing when 1should be designed.
4- Draw the output waveform if the signal shown in Figure below is applied to inputs of J-K Flip-Flop. Q is initially LOW. PR HIGH CLK- K CLR CLK- PR CLR
4- Draw the output waveform if the signal shown in Figure below is applied to inputs of J-K Flip-Flop. Q is initially Low. HIGH CLK- CLR nnnnnnn CLK PR CLR
Design a sequential circuit with two flip-flops A and B, and one input x_in. When x_in = 0, the circuit goes through the state transitions from 00 to 10, to 01, to 11, back to 00, and repeats. When x_in = 1, the circuit will reverse the given sequence. a. Using D Flip-Flop. b. Using JK Flip-flop. Provide the state diagram, state table, state equations, and the circuit diagram.
4-6. A sequential circuit with two D flip-flops A and B and input X and output Yis specified by the following input equations: Y = A + B D = X + B D = XA (a) Draw the logic diagram of the circuit. (b) Derive the state table. (c) Derive the state diagram. (d) Is this a Mealy or a Moore machine?
5. JK flip-flops are often used to build counters. The JK flip-flop will toggle the original output value when triggered by the clock signal if both the J,K inputs are connected with a constant "high"(logic 1). All the JK flip-flops in Figure 2 are negative edge triggered. All the initial values of Q2Q1Q0 are 0. Qo (LSB) (MSB) Input K K Logic 1 Input Q2 000 Figure 2. Counter (a) Sketch the output waveforms forQ2 Q1 Q0. Write down the output binary value (Q2Q1Q0: such as "000", "001") for each clock period on the figure. (b) Describe the function of the counter (e.g. binary down counter counting from 7 to 0).
010 For the state diagram shown below. what is the Boolean expression of the flip-flop inputs if you assume that the circuit is built using T flip-flops. (Assume that the binary code is assigned in an ascending order for the states starting from state A). X is the external input.
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