## Or Gate Truth Table

Contents

- 1 What is the OR gate truth table?
- 2 What is the OR gate in logic gates?
- 3 What are the 5 logic gates?
- 4 What is this gate?
- 5 Can logic gates have 4 inputs?
- 6 What is a universal gate?
- 7 Why use a logic gate?
- 8 What does a XOR gate do?
- 9 Are there 5 universal gates?
- 10 Why is NAND gate called universal gate?
- 11 What is universal gate and truth table?

## What is the OR gate truth table?

What is the OR Gate Truth Table? – The OR gate truth table is a table that displays the output state based on the various combinations of input states. It demonstrates how an OR logic gate works. The truth table lists the output of a particular digital logic circuit for all the possible combinations of its inputs. For example, the truth table of a 2 input OR gate can be represented as: OR Gate Truth Table It is clear from the truth table that if all the inputs or any of the inputs are high, the output Y is HIGH, whereas if all the inputs are LOW, then the output Y is low. Download Formulas for GATE Computer Science Engineering – Operating Systems

## What is the OR gate in logic gates?

The OR gate gets its name from the fact that it behaves after the fashion of the logical inclusive ‘or.’ The output is ‘true’ if either or both of the inputs are ‘true.’ If both inputs are ‘false,’ then the output is ‘false.’ In other words, for the output to be 1, at least input one OR two must be 1.

#### What is the symbol of OR gate?

Description –

OR gate | ||
---|---|---|

Input | Output | |

A | B | A OR B |

0 | ||

1 | 1 | |

1 | 1 | |

1 | 1 | 1 |

Any OR gate can be constructed with two or more inputs. It outputs a 1 if any of these inputs are 1, or outputs a 0 only if all inputs are 0. The inputs and outputs are binary digits (“”) which have two possible, In addition to 1 and 0, these states may be called true and false, high and low, active and inactive, or other such pairs of symbols.

- Thus it performs a (∨) from,
- The gate can be represented with the plus sign (+) because it can be used for,
- Equivalently, an OR gate finds the maximum between two binary digits, just as the finds the minimum,
- Together with the and the, the OR gate is one of three basic logic gates from which any may be constructed.

All other may be made from these three gates; any function in binary mathematics may be implemented with them. It is sometimes called the inclusive OR gate to distinguish it from, the exclusive OR gate. The behavior of OR is the same as XOR except in the case of a 1 for both inputs.

#### What is a 3 input OR gate?

3 Input OR Gate Truth Table. The output of a three-input OR Logic gate is zero if all the three inputs are at logic zero levels on the other hand the output is one if anyone/two/ three inputs are at logic high.

### What is the use of OR gate?

An OR gate is a digital logic gate that gives an output of 1 when any of its inputs are 1, otherwise 0. An OR gate performs like two switches in parallel supplying a light, so that when either of the switches is closed the light is on.

## What are the 5 logic gates?

Logic gates – Digital systems are said to be constructed by using logic gates. These gates are the AND, OR, NOT, NAND, NOR, EXOR and EXNOR gates. The basic operations are described below with the aid of, AND gate The AND gate is an electronic circuit that gives a high output (1) only if all its inputs are high. A dot (.) is used to show the AND operation i.e.A.B. Bear in mind that this dot is sometimes omitted i.e. AB OR gate The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high. A plus (+) is used to show the OR operation. 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. This is also shown as A’, or A with a bar over the top, as shown at the outputs. This is a NOT-AND gate which is equal to an AND gate followed by a NOT gate. The outputs of all NAND gates are high if any of the inputs are low. The symbol is an AND gate with a small circle on the output. The small circle represents inversion. NOR gate This is a NOT-OR gate which is equal to an OR gate followed by a NOT gate. The outputs of all NOR gates are low if any of the inputs are high. The symbol is an OR gate with a small circle on the output. The small circle represents inversion. EXOR gate The ‘ Exclusive-OR ‘ gate is a circuit which will give a high output if either, but not both, of its two inputs are high.

- The NAND and NOR gates are called universal functions since with either one the AND and OR functions and NOT can be generated.
- Note:
- A function in sum of products form can be implemented using NAND gates by replacing all AND and OR gates by NAND gates.

A function in product of sums form can be implemented using NOR gates by replacing all AND and OR gates by NOR gates. Table 1: Logic gate symbols Table 2 is a summary truth table of the input/output combinations for the NOT gate together with all possible input/output combinations for the other gate functions.

#### What is an ex OR gate?

Definition – “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). Figure 1. Symbol and truth table for a digital XOR gate

## What is this gate?

Who conducts the GATE exam? – Graduate Aptitude Test in Engineering, or GATE, is an exam conducted by the Indian Institutes of Technology on behalf of the National Coordination Board. The exam is used to screen candidates for admission into postgraduate engineering programs at the Indian Institutes of Technology and other institutes.

### What is the simplest logic gate?

2. Logic Gate Types and Truth Tables – The underlying symbol representation of the logic gates was depicted in the table format for your easy understanding. There is an article to introduce logic gate symbols, In this section, we will discuss in detail the seven basic logic gates and the truth table : AND Gate You can list AND gate under the primary logic gate because you can realize some of the upcoming logic gates like NAND from it. It performs multiplication or the Dot (.) operation on the logical inputs. Source: www.elprocus.com OR Gate OR gate is an essential gate unlike AND as XOR and XNOR can be realized from it. OR gate performs simple addition or ‘+’ operation with the inputs. The output is low or 0 only when both the inputs are 0, and for the rest of the cases, the output is high or logical 1. Source: www.elprocus.com NOT Gate NOT gate is the simplest among all the other logic gates. It performs an inversion operation over the single input. Only one terminal is available in NOT, and if the data is 1, the production is 0, and if the input is 0, the output is 1. Source: www.elprocus.com NAND Gate AND gate followed by a NOT gate is the actual concept behind the NAND logic gate, one among the universal gates. When you invert the output of the AND gate, the resultant is the output obtained at the other terminal. Look at the below truth table for further understanding the NAND operation. Source: www.elprocus.com NOR Gate NOR is the combination or Inversion of the logical OR gate and is also a universal logic gate. When the inputs are low or false, the resultant output is high or true. Source: www.elprocus.com XOR Gate XOR gate is also known as exclusive NOR gate. When you observe the truth table of XOR, you can find that if any input is high, the result is high or true. Source: www.elprocus.com XNOR Gate XNOR or Exclusive NOR gate’s basis its operation on the NOR gate. When there is an inversion on the NOR gate, you get the XNOR gate. The output is just opposite to that of the XOR gate. If anyone of the input is high, excluding the condition of both, the output is low or 0. Source: www.elprocus.com

### Can logic gates have 3 inputs?

LogicBlocks Experiment Guide Contributors: jimblom 2 Sometimes you need to AND more than two inputs together. In fact, 3- and 4-input AND gates are just as common as the dual-input variety. Let’s make a 3-input AND gate out of two two-input AND gates.

## Can logic gates have 4 inputs?

The 3-input Logic OR Gate –

Symbol | Truth Table | |||

3-input OR Gate | C | B | A | Q |

1 | 1 | |||

1 | 1 | |||

1 | 1 | 1 | ||

1 | 1 | |||

1 | 1 | 1 | ||

1 | 1 | 1 | ||

1 | 1 | 1 | 1 | |

Boolean Expression Q = A+B+C | Read as A OR B OR C gives Q |

Like the AND gate, the OR function can have any number of individual inputs. However, commercial available OR gates are available in 2, 3, or 4 inputs types. Additional inputs will require gates to be cascaded together for example.

## What is a 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.

### Why it is called logic gates?

The logic gates are called ‘gates’ because they give a ‘1’ on the output only when a particular combination of ‘0’ and ‘1’ is present at the inputs. This combination is the ‘key’ to open the gate which is the output.

## Why use a logic gate?

Want to join the conversation? –

I have taken logic before and not coincidentally, see that logic gates share many of the same properties as logic like NOR gate (negation), AND gate (conjunction) and the OR gate (disjunction). However, I would like to know if there will be a conditional gate or a biconditional gate. Thanks! Button navigates to signup page Button navigates to signup page

If I understand biconditional correctly, then yes, there is a corresponding logic gate. It’s called XNOR, Here is the truth table for it. A | B | OUT 0 | 0 | 1 0 | 1 | 0 1 | 0 | 0 1 | 1 | 1 Basically, if the two inputs are the same, then the output will be 1 (true). Otherwise, the output will be 0 (false). There is also a conditional gate. According to wikipedia, it is called IMPLY, Although I have not heard of many uses of this gate. Hope this helps! (: Comment on Evan’s post “If I understand biconditi.”

How do companies decide on the number of logic gates for a computer/ how do logic gates define the quality of the computer? If logic gates are how computer makes decisions for outputs, and there billions of possible inputs, how does a computer scientist decide there are enough in a system? How do they decide which inpiuts correspond to a certain gate? How are the gates implemented for a keyboard, for example? Is there one logic gate for each key? Button navigates to signup page Button navigates to signup page Could you classify a computer as a logic gate itself? Because all computers really do is take in 0s and 1s, and then outputs some 0s and 1s. Isn’t that the same definition of a logic gate? Thanks for responding! (: Button navigates to signup page Button navigates to signup page

From the author: Interesting idea! It’s true that a computer takes in binary data and outputs binary data. However, it does more than a logic gate. A logic gate is a device performing a Boolean logic operation on one or more binary inputs and then outputs a single binary output. Computers perform more than simple Boolean logic operations on input data, and they typically output more than a single binary digit. Computers definitely use logic gates for all their calculations, however, so they are incredibly dependent on logic gates! Button navigates to signup page

Can you expand on this Boolean Operation? What are some (real-life) examples? Are all the gates Boolean. (how)? Button navigates to signup page Comment on Moksha’s post “Can you expand on this Bo.”

From my understanding, boolean gates take two values/bits(1s and 0s) and output an appropriate result. For example, imagine you had a machine that needed to be precise with its results(if the result is off by a 0.00001, then the machine wouldn’t work). For your output to be precise, you would need all of your inputs to be as accurate. This is where you would then use a logic gate(specifically an AND Gate) to make sure that the inputs are correct. An AND Gate because this gate only works(outputs a 1) when all of the inputs gates are correct(When all gates are 1s). What you want your machine to do will influence which gate you choose and how you will use it. I hope this helps. Button navigates to signup page

does all logic gates used ina computer and what do they operate about Button navigates to signup page Button navigates to signup page

You have a multitude of different logic gates that operate within a computer. These gates are used in combinational and sequential circuit design. The logic gates include: AND, OR, NOT, NAND, NOR, XOR and XNOR. The AND gate takes two inputs and evaluates to true (i.e. outputs a ‘1’) when both of its inputs are true, or false otherwise. The OR gate takes two inputs and evaluates to true when either one of its inputs are true (or if both inputs are true – this is conventionally named “inclusive or”). The NOT gate takes in one input and inverts that input (i.e. it will flip a ‘1’ to a ‘0’ and a ‘0’ to a ‘1’). The NAND gate is essentially an AND gate whose output is then fed into a NOT gate. Therefore, it is true in all cases except for when both inputs are ‘1’. The NOR gate is essentially an OR gate whose output is then fed into a NOT gate. Therefore, it is true only in the case where both inputs are zeroes (the only case that would have made an OR gate output a ‘0’). The XOR gate is true when the inputs are opposite of each other, but false when they are equal. For example, the two inputs ‘1’ and ‘0’ would produce a true (‘1’) output, but the two inputs ‘1’ and ‘1’ or ‘0’ and ‘0’ would produce a false (‘0’) output (this is conventionally named “exclusive or”). The XNOR gate follows the same conventions as above, and acts like an XOR gate whose output is then fed into a NOT gate. Therefore, an XNOR gate is true only when the two inputs are the same, Logic gates are the fundamental building blocks that you need to understand in order to understand computer system design, do take the time to familiarize yourself with the gates and continue to ask questions if you are curious or need any help! Button navigates to signup page

I would appreciate a further explanation of how to apply the three basic gates in real life computing Button navigates to signup page Button navigates to signup page

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Can you explain why you mean that NAND and NOR are universal gates? Button navigates to signup page Button navigates to signup page

search on google or you tube Button navigates to signup page

As in XOR (Puts out a 1 if there is only 1 true input). Will it answer 1 if both the inputs are true or 1? Button navigates to signup page Button navigates to signup page

You can think of XOR as an inequality detector. If you have a 0 with a 1, the two inputs are not equal and hence you output 1. Alternatively, if you have 0 with 0 or 1 with 1 (as you mention), you output 0. Button navigates to signup page

If Im designing a digital circuit, and there’s an input A, is there any gate I can use to check at the beginning of my circuit if A is true or false? Because I would only feed A through the rest of my gates if its true, but I don’t know how to “check” if its false. Button navigates to signup page Button navigates to signup page Can you explain to me Building blocks that use NAND and NOR gates? Button navigates to signup page Button navigates to signup page

## What does a XOR gate do?

Exclusive OR Gate: Definition, Symbol and truth table of XOR gate, Diagram, Application The Exclusive-OR gate or XOR gate is achieved by combining standard logic gates together. XOR gate is used extensively in error detection circuits, computational logic comparators and arithmetic logic circuits.

## Are there 5 universal gates?

There are 5 universal gates. Explanation: There are only 2 main universal gates: NAND and NOR. A NAND gate as well as the NOR gate can be used to implement any other Boolean expression thus it is called as a universal gate.

#### What is the NOT gate theory?

Truth table for a NOT gateInput | Output |
---|---|

false | true |

true | false |

A NOT gate, often called an inverter, is a nice digital logic gate to start with because it has only a single input with simple behavior. A NOT gate performs logical negation on its input. In other words, if the input is true, then the output will be false, Similarly, a false input results in a true output. The truth table for a NOT gate appears to the right.

## Why is NAND gate 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.

## What is universal gate and truth table?

The truth table clearly shows that the NOR operation is the complement of the OR. Universal Gates: 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.