How Can You Create a NOT Gate Using a NAND Gate?

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In summary: The hyperphysics site has an article on the NAND gate that discusses this issue in more detail.NascentO is correct - this is something you'll notice on the hyperphysics site as well.
  • #1
Femme_physics
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Basic Electronic Gates Question...

Homework Statement



Demonstrate, via a proper scheme, how can you realize a gate from type NOT, through a single gate from type NAND with two entries?


The Attempt at a Solution



http://img208.imageshack.us/img208/6093/image201202080001.jpg

I got it, right?
 
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  • #2


Yes, the electronics is right. The translation is a bit awkward:
Demonstrate, via a proper scheme, how can you realize a gate from type NOT, through a single gate from type NAND with two entries?
Demonstrate how to realize a NOT gate using a two-input NAND gate. :smile:

You might be able to think of another slightly different way, still using a two-input NAND gate.
 
  • #3


Sorry about the translation, it's hard translating technical stuff sometimes! :) Much appreciated.

You might be able to think of another slightly different way, still using a two-input NAND gate.

Hmmm, I can't come up with anything...any clues?
 
  • #4


The scheme you've shown imposes a double load on whatever is supplying signal A. This often is inconsequential, but sometimes it may be undesirable. There is an arrangement that imposes just a single load.
 
  • #5


There is an arrangement that imposes just a single load

The problem is that I am asked that the NAND gate has two entries (is that what you mean by load?) so I can't change it to one entry.
 
  • #6


The NAND gate has two inputs. Each input (in general) requires current and this current has to be supplied from wherever signal A is coming from. By connecting signal A to two inputs of your NAND gate the source of signal A is being asked to supply double the current that it would if you connected to just one input of the NAND gate.
 
  • #7


Hi FP :smile:
I believe what NascentO is trying to get at,
is something you will also note on the hyperphysics site,
under NAND gate operations.
(You can also find it on wikipedia but hyperphysics is a very fine reference).
 

FAQ: How Can You Create a NOT Gate Using a NAND Gate?

1. What is a basic electronic gate?

A basic electronic gate is a fundamental building block of digital logic circuits. It is an electronic device that performs a logical operation on one or more binary inputs and produces a single binary output. The three most commonly used basic gates are AND, OR, and NOT gates.

2. How does an AND gate work?

An AND gate has two input terminals and one output terminal. It only produces a high output (1) when both inputs are high (1). Otherwise, the output is low (0). This operation can be represented by the logical expression A AND B = C, where A and B are the inputs and C is the output.

3. What is the truth table for an OR gate?

The truth table for an OR gate shows the output that is produced for each possible combination of inputs. In an OR gate, the output is high (1) when at least one of the inputs is high (1). The truth table for an OR gate is as follows:

Input A Input B Output
0 0 0
0 1 1
1 0 1
1 1 1

4. Can NOT gates be used to create other logic gates?

Yes, NOT gates can be used to create other logic gates. They can be combined with other basic gates to create more complex gates, such as NAND and NOR gates. These gates can then be used to build more complex digital logic circuits.

5. What is the difference between a basic gate and a universal gate?

A basic gate is a gate that performs a single logical operation, such as AND, OR, or NOT. A universal gate, on the other hand, can perform multiple logical operations. For example, a NAND gate is a universal gate because it can perform the functions of an AND gate and a NOT gate. This makes universal gates more versatile and useful in digital logic circuits.

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