Question

What will be the output if switches SW7, SW4 and SW8 are pressed at the same time in the following circuit? +5 V Pull-up resister on each encoder 1 k$\Omega$ input shown only for SW9 SW9 $\bar{A}_9$ SW8 $\bar{A}_8$ SW7 $\bar{A}_7$ SW6 $\bar{A}_6$ SW5 $\bar{A}_5$ 74LS147 $\bar{A}_4$ Decimal- to-BCD priority encoder SW4 SW3 $\bar{A}_3$ SW2 $\bar{A}_2$ SW1 $\bar{A}_1$ SW0 $\bar{O}_3$ $\bar{O}_2$ $\bar{O}_1$ $\bar{O}_0$ Normal BCD Ans.

          What will be the output if switches SW7, SW4 and SW8 are pressed at the same time in the
following circuit?
+5 V
Pull-up resister
on each encoder
1 k$\Omega$
input shown
only for SW9
SW9
$\bar{A}_9$
SW8
$\bar{A}_8$
SW7
$\bar{A}_7$
SW6
$\bar{A}_6$
SW5
$\bar{A}_5$
74LS147
$\bar{A}_4$
Decimal-
to-BCD
priority
encoder
SW4
SW3
$\bar{A}_3$
SW2
$\bar{A}_2$
SW1
$\bar{A}_1$
SW0
$\bar{O}_3$
$\bar{O}_2$
$\bar{O}_1$
$\bar{O}_0$
Normal
BCD
Ans.

What will be the output if switches SW7, SW4 and SW8 are pressed at the same time in the
following circuit?
+5 V
Pull-up resister
on each encoder
1 kΩ
input shown
only for SW9
SW9
A̅9
SW8
A̅8
SW7
A̅7
SW6
A̅6
SW5
A̅5
74LS147
A̅4
Decimal-
to-BCD
priority
encoder
SW4
SW3
A̅3
SW2
A̅2
SW1
A̅1
SW0
O̅3
O̅2
O̅1
O̅0
Normal
BCD
Ans.

Added by Shelby M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Manish Jain

Step 1

- SW4: This corresponds to input A4. - SW8: This corresponds to input A2. Since all three switches are pressed at the same time, it means that all three inputs (A7, A4, and A2) will be HIGH. Now, let's analyze the behavior of the 74LS147 Decimal-to-BCD priority Show more…

Show all steps

Thanks for your feedback!

What will be the output if switches SW7, SW4, and SW8 are pressed at the same time in the following circuit? The pull-up resistor on each encoder input is shown as 1k only for SW9. The circuit includes a 74LS147 Decimal-to-BCD priority encoder with inputs A, A2, A4, and A7. The switches SW6, SW5, SW3, SW2, and SW1 are also present.