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

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Discussion Overview

The discussion revolves around how to create a NOT gate using a two-input NAND gate. Participants explore the technical aspects of this electronic circuit design, including potential variations and implications of their configurations.

Discussion Character

  • Homework-related, Technical explanation, Debate/contested

Main Points Raised

  • One participant presents a scheme for realizing a NOT gate with a NAND gate and seeks confirmation of its correctness.
  • Another participant agrees that the electronics are correct but suggests that the translation of the homework statement could be clearer.
  • Some participants propose that there might be alternative methods to achieve the same result using a two-input NAND gate.
  • A concern is raised regarding the double load imposed on the signal source when connecting the same signal to both inputs of the NAND gate.
  • Further clarification is provided about the implications of the load on the current supply from the signal source when using a two-input configuration.
  • One participant references external resources, such as HyperPhysics and Wikipedia, to support their points about NAND gate operations.

Areas of Agreement / Disagreement

Participants generally agree on the correctness of the electronic scheme presented, but there are differing views on the implications of the load and the potential for alternative configurations. The discussion remains unresolved regarding the best approach to minimize load while adhering to the requirement of using a two-input NAND gate.

Contextual Notes

Participants express uncertainty about the implications of load on the signal source and the constraints of using a two-input NAND gate, indicating that further exploration of these aspects may be necessary.

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?
 
Last edited by a moderator:
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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.
 


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?
 


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.
 


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.
 


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.
 


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).
 

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