NOT gate and truth table (digital electronics)

May 1 • General • 3206 Views • 5 Comments on NOT gate and truth table (digital electronics)

NOT GATE AND TRUTH TABLE (DIGITAL ELECTRONICS)

 

To know about Not gate and truth table first of all we have to know about gate and truth table

LOGIC GATES:

  • These are the logic circuits that form the building blocks of complex digital systems which can do arithmetic and logic functions.
  • They can accept one or more input voltages but with one output voltage.
  • They work on the basis of boolean algebra.

The different types of logic gates are as follow:

  • NOT
  • AND
  • OR
  • NAND
  • NOR
  • X-OR
  • X-NOR

TRUTH TABLE:

Truth table is a table that gives output for all possible combinations of inputs to a logic circuit.

NOT GATE:

A logic gate which performs the function of logical operator NOT is called as NOT gate.Some of the function of NOT gate are as follow:

  • It performs a basic logic function called inversion or complementation.
  • The purpose of inverter is to change one logic leval to opposite leval.
  • The gate has only one input and one output.

Its symbol is,

download

And its truth table is,

download_2

The bubble at the end of the not gate represents a signal inversion or complimentation  of the output signal.but in some cases bubble are also present at the gate inputs to indicate an active low input.And the inversion of the input signal is not restricted up to not gate but also can be used  on any digital circuit or gate .

The logic NOT gate or invertor  can also be made using NAND and  NOR gate by connecting their all input together to a common input signal as shown in the figure below,

log13

2 input NAND gate

log13

2 input NOR gate

IMPORTANT QUESTIONS:

1-What are logic gates?Write diffrent types of logic gates?

Ans- These are the logic circuits that form the building blocks of complex digital systems which can do arithmetic and logic functions.

  • They can accept one or more input voltages but with one output voltage.
  • They work on the basis of boolean algebra.

The different types of logic gates are as follow:

  • NOT
  • AND
  • OR
  • NAND
  • NOR
  • X-OR
  • X-NOR

2-Define truth table?

Ans-Truth table is a table that gives output for all possible combinations of inputs to a logic circuit.

3-What is NOT gate and write down its functions?

Ans-A logic gate which performs the function of logical operator NOT is called as NOT gate.Some of the function of NOT gate are as follow:

  • It performs a basic logic function called inversion or complementation.
  • The purpose of inverter is to change one logic leval to opposite leval.
  • The gate has only one input and one output.

4-Draw the symbol of NOT gate

Ans-download

5-Show the truth table for NOT gate?

Ans-download_2

6-What does the bubble at the end of the NOT gate represents?

Ans-The bubble at the end of the not gate represents a signal inversion or complimentation  of the output signal.but in some cases bubble are also present at the gate inputs to indicate an active low input.And the inversion of the input signal is not restricted up to not gate but also can be used  on any digital circuit or gate .

7-Draw the logic gate from which NOT gate can be obtained?

Ans-log13

log13 (1)

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5 Responses to NOT gate and truth table (digital electronics)

  1. Soubarna Biswas says:

    Logic gates are very important part of any electronic hardware. Knowledge of each logic gate is very important. This article is very informative. Every body should read it.

  2. Rachita Mishra says:

    Electronics interested people can get idea about different Gates.

  3. Priyanka Bal says:

    This article provides basic information about NOT gates and the explanation with the diagrams are quite helpful.

  4. priyanka nayak says:

    Logical gates are the fundamentals of basic electronics. The proper illustrations of gates using diagram was really helpful.

  5. shweta singh says:

    The article provides quite handful of the information about the NOT logic gate along with some basic information about it

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