Basic Logic Gates

What is a logic gate?

A logic gate is an idealized or physical device implementing a Boolean function, a logical operation performed on one or more binary inputs that produce a single binary output. Depending on the context, the term may refer to an ideal logic gate, one that has for instance zero rise time and unlimited fan-out, or it may refer to a non-ideal physical device.
Logic circuits include such devices as multiplexers, registers, arithmetic logic units(ALUS), and computer memory, all the way up through complete microprocessors, which may contain more than 100 million logic gates.

Logic gate purpose

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.

What is a logic gate simple definition?

This is a device that acts as a building block for digital circuits. they perform basic logical functions that are fundamental to digital circuits. Most electronic devices we used today will have some form of logic gates in them.

The circle in the logic symbol of a not gate is known as what?

Transistor logic NOT gate. The standard NOT gate is given a symbol whose shape is of a triangle pointing to the right with a circle at its end. The circle is known as an “inversion bubble” and is used in NOT, NAND, and NOR symbols at their output to represent the logical operation of the NOT function. Boolean expression of NOT gate is X=A-.

what does the circle mean in logic gates?

In electronics, a NOT gate is more commonly called an inverter. The circle on the symbol is called a bubble and is used in logic diagrams to indicate a logic negation between the external logic state and the internal logic state.

What is a NOT gate also known as?

The NOT gate is an electronic circuit that produces an inverted version of the input at its output. it is also known as an inverter. If the input variable is A, the inverted output is known as NOT A.

What is the name of the logic symbol?

1. Material implications


The material implication symbol is => –>

Unicode Value
Unicode values (hexadecimal) are:
  • U+21D2
  • U+2192
  • U+2283

2. Material equivalence 


The material equivalence symbol is <=>  <->

Unicode Value

Unicode values are:

  • U+21D4
  • U+2261
  • U+2194

3. Negation

The negation symbol ~ ! 
Unicode Value
Unicode values are:
  • U+00AC
  • U+02DC
  • U+0021

4. Domain of discourse

Unicode Value
Unicode values are:
  • U+1D53B

What does a circle symbol symbolize?

The circle is a universal symbol with extensive meaning. It represents the Notions of totality, wholeness, original perfection, the self, the infinite, eternity, timelessness, all cycling movement, god (god is a circle whose center is everywhere and whose circumference is now here “( Hermes Trismegistus)”).

What is the circle of life symbol?

The circle of life symbolizes two opposites, life, and death, so rationally it should be a neutral symbol. But humans assign meaning to symbols, and humans aren’t always rational.

What are the 7 types of symbols in the logic gates?

7 types of symbols are
  1. Pictogram
  2. Ideogram
  3. Icon
  4. Rebus
  5. Phonogram
  6. Typogram
  7. Logo (trademark)

What is the principle of logic gates?

When a transistor is on, or open, then an electric current can flow through. And when it’s off, then no current flows. When you string a bunch of these transistors together, then you get what’s called a logic gate, which lets you add, subtract, multiply and divide binary numbers in any way imaginable.

Which logic gate is most important?

The AND and NAND gates are possibly the most widely used form of logic gates that are used of the two the NAND gate is the most widely seen. Or/NOR: OR gates and NOR gates are other forms of logic gates that form one of the basic building blocks of digital technology.

What are the 4 types of logic?

The four main logic types are:
  1. Informal logic
  2. Formal logic
  3. Symbolic logic
  4. Mathematical logic

Who made the first logic gate?

Walther Bothe, the 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).

logic gate

Walther Bothe

Who invented logic gates?

Mathematician George Boole died 150 years ago. Boolean logic, the system he invited, is still used in Morden computer programing, writes Chris Stokel-Walker.

How is the logic gate used in everyday life?

Logic, on the other hand, may be defined as the science that evaluates arguments. All of us encounter arguments in our everyday life. We read arguments in books, magazines, and newspapers, hear them on television, and formulate them when communicating with friends, parents, juniors, and seniors colleagues.

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