Table of Contents

- 1 What is the logical expression for ex-NOR gate?
- 2 Can NOR gate have 3 inputs?
- 3 What is difference between ex or and ex-NOR gate?
- 4 What is the use of EX OR gate?
- 5 What is Boolean for 3-input AND gate?
- 6 What is the equation of AND gate?
- 7 What is the Ex nor function in logic?
- 8 When is the output of ex-NOR gate 1?

## What is the logical expression for ex-NOR gate?

2-input EX-NOR (Exclusive NOR) Gate For a 2-input Ex-NOR gate, the output Q is true if BOTH input A and input B are the same, either true or false, giving the Boolean Expression of: ( Q = (A and B) or (NOT A and NOT B) ).

## Can NOR gate have 3 inputs?

As with the OR function, the NOR function can also have any number of individual inputs and commercial available NOR Gate IC’s are available in standard 2, 3, or 4 input types. If additional inputs are required, then the standard NOR gates can be cascaded together to provide more inputs for example.

**What is the equation of a three input OR gate?**

y = a’bc’ + ab’c’ + ab’c The combinational circuit constructed from these two equations is shown in (a) of Figure 1.4(f). . Each 3-variable AND term is replaced by a 3-input AND gate.

**What is a 3 input NOR gate?**

General Description. This device contains three independent gates each of which performs the logic NOR function. Ordering Code: Devices also available in Tape and Reel.

### What is difference between ex or and ex-NOR gate?

In the XOR gate operation, the output is only 1 when only one input is 1. The output is logical 0 when both inputs are the same, meaning they are either 1 or 0. But in the XNOR gate, the inverse is true.

### What is the use of EX OR gate?

It is used in simple digital addition circuits which calculate the sum and carry of two (half-adder) or three (full-adder) bit numbers. XOR gates are also used to determine the parity of a binary number, i.e., if the total number of 1’s in the number is odd or even.

**How many NOR gates are required for AND gate?**

AND: You need three NOR gates to create an AND gate. The first two are configured as NOT gates, so they invert the inputs. Then the third NOR gate produces a HIGH output if both of the original inputs are HIGH. NAND: It takes four NOR gates to create a NAND gate.

**What is the symbol of NOR gate?**

The ANSI symbol for the NOR gate is a standard OR gate with an inversion bubble connected. The bubble indicates that the function of the or gate has been inverted.

## What is Boolean for 3-input AND gate?

The Boolean expression for a 3-input OR gate is ________. 63….Exercise :: Logic Gates – General Questions.

A. | A = 1, B = 1, C = 1 |
---|---|

B. | A = 1, B = 0, C = 0 |

C. | A = 0, B = 0, C = 1 |

D. | A = 0, B = 0, C = 0 |

## What is the equation of AND gate?

The logic or Boolean expression given for a digital logic AND gate is that for Logical Multiplication which is denoted by a single dot or full stop symbol, ( . ) giving us the Boolean expression of: A.B = Q.

**How does a NOR gate work?**

The NOR gate is a digital logic gate that implements logical NOR – it behaves according to the truth table to the right. A HIGH output (1) results if both the inputs to the gate are LOW (0); if one or both input is HIGH (1), a LOW output (0) results. NOR is the result of the negation of the OR operator.

**What is the use of EX-OR gate?**

### What is the Ex nor function in logic?

The Ex-NOR function is a combination of different basic logic gates Ex-OR and a NOT gate, and by using the 2-input truth table above, we can expand the Ex-NOR function to: which means we can realise this new expression using the following individual gates.

### When is the output of ex-NOR gate 1?

The output of EX-NOR gate is 1 when both the inputs are 1 (high) and if both the inputs are 0 (low). If either one of the input is 1 (high) the output will be 0 (low). In other words, both the inputs should be in the same logic level for the output to be 1.

**Which is the logic symbol of the Exclusive-NOR gate?**

In other words, both the inputs should be in the same logic level for the output to be 1. The logic symbol of an Exclusive-NOR gate is an XOR gate (Exclusive-OR gate) with the “inversion bubble” or the circle in front. Therefore, the Exclusive-NOR gate is the complementary form of the Exclusive-OR gate.

**Is the Boolean function the same for the 3-input XNOR gate?**

The Boolean function is same for the 3- input XNOR gate is 3-Input Ex-NOR gate logic symbol Truth table For Exclusive NOR gates, we can have the HIGH input when even numbers of inputs are at HIGH level. So the 3-input XNOR gate is called as “Even functioned OR gate”.The truth table and logic symbol for 3-input XNOR gate is given below.