Types and sub types of data logics

 

In previous blog Introduction to data logic

We talked about the basics what is data logic and about transistors  now we will talk about digital gates.

 

 Digital electronic circuits operate with voltages of two logic levels false and truth (0&1). The range of voltages corresponding to Logic false is represented with ‘0’. Similarly, the range of voltages corresponding to Logic truth is represented with ‘1’.

The basic digital electronic circuit that has one or more inputs and single output is known as Logic gate. Hence, the Logic gates are the building blocks of any digital system. We can classify these Logic gates into the following three categories.

• Basic gates
• Universal gates
• Special gates

1.     BASIC GATES,

 The basic gates are

·         AND gate.

·         OR gate.

·         NOT gate.

The first one is AND gate .  An AND gate is a digital circuit that has two or more inputs and produces an output, which is the logical AND of all those inputs.

 The truth table of 2-input AND gate.

A	B	Y = A.B
0	0	0
0	1	0
1	0	0
1	1	1

Here A, B are the inputs and Y is the output of two input AND gate. If both inputs are ‘1’, then only the output, Y is ‘1’. For remaining combinations of inputs, the output, Y is ‘0’.

 

In simple words, there are two switches on a same line then both switches should be turned on then bulb Will be turned on

 Second one is OR gate . An OR gate is a digital circuit that has two or more inputs and produces an output, which is the logical OR of all those inputs. . Between which (+) is present.

 the truth table of 2-input OR gate.

A	B	Y = A + B
0	0	0
0	1	1
1	0	1
1	1	1

Here A, B are the inputs and Y is the output of two input OR gate. If both inputs are ‘0’, then only the output, Y is ‘0’. For remaining combinations of inputs, the output, Y is ‘1’.

In simple words, there are two switches on a parallel line then any one  switches should be turned on to light up bulb. 

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   Third one is not gate A NOT gate is a digital circuit that has single input and single output. The output of NOT gate is the logical inversion of input. Hence, the NOT gate is also called as inverter.

 The truth table of NOT gate.

A	Y = A’
0	1
1	0

in next blog we will talk about Universal gates and Special gates.

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