Chapter 3
Sequential Logic Circuits
Tutorial 8

1.	Draw the logic circuit diagram of an S-R flip-flop using NAND gates only.

2.	Draw the logic circuit diagram of an S-R flip-flop using NOR gates only.

3.	Explain the operations of the above circuits (S-R flip-flop).  Conclude the operations in a truth table.  Give the circuit symbol of the S-R flip-flop.

4.	Draw the output waveform at Q if the following waveforms are fed into the inputs of an S-R flip-flop.

Chapter 3
Sequential Logic Circuits
Tutorial 9

5.	Draw the logic circuit diagram of a J-K flip-flop using NAND gates only.

6.	Draw the logic circuit diagram of a J-K flip-flop using NOR gates only.

7.	Explain the operations of the above circuits (J-K flip-flop).  Conclude the operations in a truth table.  Give the circuit symbol of the J-K flip-flop.

8.	With the aids of diagram, show how to build a D-type flip-flop from a J-K flip-flop.  Give the truth table and the circuit symbol of the flip-flop circuit.

9.	With the aids of diagram, show how to build a D-type flip-flop from an S-R flip-flop.

10.	With the aids of diagram, show how to build a T-type flip-flop from a J-K flip-flop.  Give the truth table and the circuit symbol of the flip-flop circuit.

Chapter 3
Sequential Logic Circuits
Tutorial 10

11.	Give the truth table and the circuit symbol of the positive edge-triggered S-R flip-flop.

12.	Give the truth table and the circuit symbol of the negative edge-triggered J-K flip-flop.

13.	Draw the output waveform at Q if the following waveforms are fed into the inputs of

	(a)	a negative clocked J-K flip-flop.
	(b)	a positive clocked J-K flip-flop.
	(a)	a negative edge-triggered J-K flip-flop.
	(b)	a positive edge-triggered J-K flip-flop.

	

14.	Explain the function of the direct inputs.  Explain the term low-activation related to the direct inputs.