How to obtain 4 input or gate using 2 input gates?

In summary, to obtain 4 input OR gate using 2 input gates, you can run two pairs of inputs through two separate OR gates to get two outputs, then run those outputs through a third OR gate to get the final output. However, it is important to note that doing this problem for someone else takes away from their learning experience. It is better to work it out on your own and discover the solution.
  • #1
denian
641
0
how can i obtain 4 input or gate using 2 input gates? :confused:

any help will be appreciated.
 
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  • #2
You have four inputs a,b,c,d.
Run a and b in one or gate. And get output m.
Run c and d in another or gate. And get output n.
Run m and n in a third or gate, and you have your final output z.
 
  • #3
Doing the problem for him doesn't help him learn. :tongue2: For example, it takes away from him the possibility of figuring out on his own that he could look at the algebraic expression W or X or Y or Z, and figure out that he can group them in pairs, then turn the result into a circuit. These things are much better learned by working it out yourself than being handed the answer. :frown:
 
  • #4
hi. thank you. i am thinking of that way too but wouldn't that require 3 get instead of 2?
 

1. What is an input gate and how does it work?

An input gate is a basic logic gate that takes in one or more binary inputs and produces a single output based on a specific logic function. It works by evaluating the logic function and producing the corresponding output based on the input values.

2. How can I obtain a 4 input gate using only 2 input gates?

To obtain a 4 input gate using only 2 input gates, you can use a combination of logic gates such as AND, OR, and NOT gates. One way to do this is by using two 2-input AND gates, one 2-input OR gate, and one 2-input NOT gate to create a 4-input AND gate.

3. Can I use different types of input gates to obtain a 4 input gate?

Yes, you can use different types of input gates to obtain a 4 input gate. As long as the combination of gates and logic functions used result in a 4-input gate, you can use any type of gates that are available.

4. Is it possible to obtain a 4 input gate using only one type of input gate?

Yes, it is possible to obtain a 4 input gate using only one type of input gate. For example, you can use four 2-input AND gates to create a 4-input AND gate. However, using a combination of different input gates may result in a more efficient and simpler circuit.

5. Are there any limitations to obtaining a 4 input gate with 2 input gates?

There are no limitations to obtaining a 4 input gate with 2 input gates as long as the logic function and input combinations can be properly evaluated. However, using a larger number of input gates may result in a more complex and potentially less efficient circuit.

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