Question

Asynchronous Up Counter D C B A Pulser Switch CLK J-K Flip- Flop J-K Flip- Flop J-K Flip- Flop J-K Flip- Flop 4-Bit Asynchronous Counter 1. Prelab: Use Figure 1, design the 4-bit asynchronous counter. Sketch it out on paper and then design the counter in Multisim. Build the circuit from the Multisim design. Use the Pulser Switches to act as the clock input. Draw the output of the four LEDs for the first 11 clock pulses in Figure 2. CLK 1 2 3 4 5 6 7 8 9 10 11 D C B A Figure 2 Asynchronous Down Counter 1. Describe how this counter be converted to count down? Do not tear down the up counter. Make the changes to the Multisim design which would make the circuit a down counter. Build modify the circuit to become a down counter. Draw the output of the four LEDs for the first 11 clock pulses Figure 3. CLK 1 2 3 4 5 6 7 8 9 10 11 D C B A Figure 3

          Asynchronous Up Counter
D
C
B
A
Pulser
Switch
CLK
J-K Flip-
Flop
J-K Flip-
Flop
J-K Flip-
Flop
J-K Flip-
Flop
4-Bit Asynchronous Counter
1. Prelab: Use Figure 1, design the 4-bit asynchronous counter. Sketch it out on paper and
then design the counter in Multisim. Build the circuit from the Multisim design. Use the
Pulser Switches to act as the clock input. Draw the output of the four LEDs for the first 11
clock pulses in Figure 2.
CLK
1
2
3
4
5
6
7
8
9
10
11
D
C
B
A
Figure 2
Asynchronous Down Counter
1. Describe how this counter be converted to count down? Do not tear down the up counter.
Make the changes to the Multisim design which would make the circuit a down counter.
Build modify the circuit to become a down counter. Draw the output of the four LEDs for
the first 11 clock pulses Figure 3.
CLK
1
2
3
4
5
6
7
8
9
10
11
D
C
B
A
Figure 3

Asynchronous Up Counter
D
C
B
A
Pulser
Switch
CLK
J-K Flip-
Flop
J-K Flip-
Flop
J-K Flip-
Flop
J-K Flip-
Flop
4-Bit Asynchronous Counter
1. Prelab: Use Figure 1, design the 4-bit asynchronous counter. Sketch it out on paper and
then design the counter in Multisim. Build the circuit from the Multisim design. Use the
Pulser Switches to act as the clock input. Draw the output of the four LEDs for the first 11
clock pulses in Figure 2.
CLK
1
2
3
4
5
6
7
8
9
10
11
D
C
B
A
Figure 2
Asynchronous Down Counter
1. Describe how this counter be converted to count down? Do not tear down the up counter.
Make the changes to the Multisim design which would make the circuit a down counter.
Build modify the circuit to become a down counter. Draw the output of the four LEDs for
the first 11 clock pulses Figure 3.
CLK
1
2
3
4
5
6
7
8
9
10
11
D
C
B
A
Figure 3

Added by Melissa A.

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