# What is logic gate and types?

Logic gates are used in microcontrollers, microprocessors, electronic and electrical project circuits, and embedded system applications. The basic logic gates are categorized into seven types as AND, OR, XOR, NAND, NOR, XNOR, and NOT. These are the important digital devices, mainly based on the Boolean function.

## What is logic gate short answer?

Logic gates are the basic building blocks of any digital system. It is an electronic circuit having one or more than one input and only one output. The relationship between the input and the output is based on a certain logic. Based on this, logic gates are named as AND gate, OR gate, NOT gate etc.

## What is a logic gate example?

Table 2 below defines each gate in words and then in Boolean logic.

Logic gates.

Gate Description Boolean representation
NOR Output is false if and only if at least one input is true (C=frac{}{(A+B)})
Exclusive NOR Output is true when both inputs are false or both inputs are true (C=frac{}{(A⊕B)})

## What is a logic gate and where is it used?

Logic Gates are the building blocks of Digital Systems. They are basically used to perform logical operations by acting as a switch. Boolean Functions are implemented using Logic Gates. A Logic Gate accepts the input and operates on a required condition.

What is logic gate and types? – Related Questions

## What are the 3 types of logic gates?

All digital systems can be constructed by only three basic logic gates. These basic gates are called the AND gate, the OR gate, and the NOT gate. Some textbooks also include the NAND gate, the NOR gate and the EOR gate as the members of the family of basic logic gates.

## What is the main uses of logic gates?

Logic gates are used to carry out logical operations on single or multiple binary inputs and give one binary output. In simple terms, logic gates are the electronic circuits in a digital system.

## Where are logic gates used in real life?

The applications of logic gates are mainly determined based upon their truth table, i.e their mode of operations. The basic logic gates are used in many circuits like a push button lock, light activated burglar alarm, safety thermostat, an automatic watering system etc.

## What are 7 logic gates?

The basic logic gates are classified into seven types: AND gate, OR gate, XOR gate, NAND gate, NOR gate, XNOR gate, and NOT gate. The truth table is used to show the logic gate function. All the logic gates have two inputs except the NOT gate, which has only one input.

## Why are they called logic gates?

They are the basic building blocks of any digital system. It is an electronic circuit having one or more inputs and only one output. The relationship between the input and output is based on a certain logic. Hence logic gates are named as AND gate, OR gate, NOT gate, etc.

## Which is the logic gate is used as a inventor?

Walther Bothe, inventor of the coincidence circuit, got part of the 1954 Nobel Prize in physics, for the first modern electronic AND gate in 1924. Konrad Zuse designed and built electromechanical logic gates for his computer Z1 (from 1935 to 1938).

## What is the symbol of OR Gate?

The logic or Boolean expression given for a digital logic OR gate is that for Logical Addition which is denoted by a plus sign, ( + ) giving us the Boolean expression of: A+B = Q.

## What is XOR and XNOR?

The XOR output is asserted whenever an odd number of inputs are asserted, and the XNOR is asserted whenever an even number of inputs are asserted: the XOR is an odd detector, and the XNOR an even detector. This very useful property will be exploited in data error detection circuits discussed later.

## How do you make a logic gate?

Simple digital logic gates can be made by combining transistors, diodes and resistors with a simple example of a Diode-Resistor Logic (DRL) AND gate and a Diode-Transistor Logic (DTL) NAND gate given below.

## What is universal gate?

A universal gate is a gate which can implement any Boolean function without need to use any other gate type. The NAND and NOR gates are universal gates. In practice, this is advantageous since NAND and NOR gates are economical and easier to fabricate and are the basic gates used in all IC digital logic families.

## Is a logic gate a transistor?

A logic gate in a microchip is made up of a specific arrangement of transistors. For modern microchips, the transistors are of the kind called Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and the semiconductor used is silicon.

## What is logic circuit diagram?

Logic Diagram – This is a graphical representation of a logic circuit that shows the wiring and connections of each individual logic gate, represented by a specific graphical symbol, that implements the logic circuit.

## Why XOR gate is called an inverter?

Why XOR gate is called an inverter? Explanation: The XOR (Exclusive Or) gate has a true output when the two inputs are different. When one input is true, the output is the inversion of the other. When one input is false, the output is the non-inversion of the other.

## What do you mean by XOR gate?

What is an XOR Gate? “XOR” an abbreviation for “Exclusively-OR.” The simplest XOR gate is a two-input digital circuit that outputs a logical “1” if the two input values differ, i.e., its output is a logical “1” if either of its inputs are 1, but not at the same time (exclusively).

## Which is not a basic gate?

question. (D) NOR gate is not a basic logic gate.

## Why NAND gate is called universal gate?

NAND Gate is called Universal Gates because all the other gates (NOT, AND, OR and NOR)can be created by using this gate.

## Why NAND and NOR are universal gates?

The OR, AND, and NOT are the three basic logic gates as they together can construct the logic circuit for any given Boolean expression. NOR and NAND gates have the property that they individually can be used to hardware-implement any logic circuit. For this reason, the NAND and NOR gates are called universal gates. 