Question

Lab Exercise 2 (20 ma rks) Title: Asynchronous Counters (using Dual JK Negative-Edge-Triggered flip-flops) Objective: To understand usage and theory of the Asynchronous Counters built using the JK-FF Component: 74LS73 Dual JK Negative-Edge-Triggered Flip-flops LED (2 Units) 330 2 resistor (2 units) DC Power supply Oscilloscope with 2 probes with build-in function generator or Oscilloscope with 2 probes with separate unit Enter Shift Function Generator + Paup Other Equipment: Jumper wires, NI Elvis Tester Board (optional) End Procedure: Construct the circuit as shown in Figure 5. Refer to specific datasheets that will be provided by the instructor for more specific information on pins. times. Have your instructor to verify the pin connections before you power up the board with square wave Observe the output on the LED and record your observations. 2. Connect the Q outputs of each JK-FF to an LED to observe the outputs at various 3. Power supply, Vcc 5V and Function generator Vi 500m Hz, 0-5V (amplitude), LENOVO'. İdeapad 320 4. 9th J 01 GND K2 2 2 CLA CLR CLK CLK CLK 1 CLR1 K1 Vcc CLK 2 CLR 2 2 Figure 4: Pin numbering for 741.S73N vCC 5.0v Vi 74LS73 330 Ohm 330 Ohm 边LED 2 LED 1 Figure S: A 2-bit Asynchronous Counter implemented using the 741 S73N IC with labeled pin numbering , What is the counting sequence of this Asynchronous Counter (You are required to include a picture of circuit output results in your report)? (4 marks) 2. Draw the State Diagram for this circuit to show the counting sequence. 3. Draw the Timing diagram for this circuit to show the counting sequence. 4. Explain why PRESET and CLEAR are set to 1 throughout the experiment and J and (2 marks) (2 marks) (2 marks) What is the output frequency of the output of JK-FF A if the Function Generator is set to 1 Hz? 5. (2 marks) Home Explain how 2-bit Asynchronous Counter operates in this experiment. 6. (4 marks) 7. Explain how 2-bit Asynchronous Counter can be modify into 4-bit Asynchronous 4 marks) Counter

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