
Computer Networking: A Top-Down Approach (7th Edition)
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ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Transcribed Image Text:**Problem #03**: If the output is a “1” for the decoders shown below, find the input given that A<sub>3</sub> is the MSB (Most Significant Bit).
### Diagram Explanation:
The problem presents four logic circuit diagrams labeled (a) to (d). Each diagram involves logic gates and digital inputs A<sub>0</sub>, A<sub>1</sub>, A<sub>2</sub>, and A<sub>3</sub>, which are inputs to the decoders.
#### Diagram (a):
- An inverter (NOT gate) is connected to input A<sub>0</sub>.
- The outputs from the inverter and lines for inputs A<sub>1</sub>, A<sub>2</sub>, and A<sub>3</sub> feed into an AND gate.
#### Diagram (b):
- Inverters (NOT gates) are connected to inputs A<sub>0</sub> and A<sub>1</sub>.
- Outputs from these inverters, along with lines for inputs A<sub>2</sub> and A<sub>3</sub>, feed into an AND gate.
#### Diagram (c):
- All inputs (A<sub>0</sub>, A<sub>1</sub>, A<sub>2</sub>, A<sub>3</sub>) connect directly to an AND gate without inversion.
#### Diagram (d):
- Inverters (NOT gates) are connected to inputs A<sub>0</sub>, A<sub>1</sub>, and A<sub>2</sub>.
- Inputs from these inverters and the direct line for A<sub>3</sub> feed into an AND gate.
To solve the problem, determine the specific input combinations for each logic circuit that results in an output of "1," with the condition that A<sub>3</sub> is the most significant bit.
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