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## What is a NOR gate?

A NOR gate (sometimes referred to by its extended name, Negated OR gate) is a digital logic gate with two or more inputs and one output with behavior that is the opposite of an OR gate.

What is the symbol for logic NOR gate?

The Boolean expression for a logic NOR gate is indicated by a plus sign, ( + ) with a line or Overline, ( ‾ ) over the expression to imply the NOT or logical negation of the NOR gate. Q.3 What is the difference between NAND and NOR gates?

What are the alternatives to NOR gates?

Alternatives. If no specific NOR gates are available, one can be made from NAND gates, because NAND and NOR gates are considered the “universal gates”, meaning that they can be used to make all the other gates.

### How do you make a NOR gate using a transistor?

A NOR gate can be realized by using two bipolar junction transistors. The basic transistor circuit diagram is shown below. This circuit is made by two parallel-connected transistors. In the circuit when both A and B are given +5 V, base of the both transistors gets quite a high potential to make the transistors ‘ON’.

The NOR gate is equivalent to the OR gate with inverted inputs and can be realized by a bubbled AND gate. The NOR gate is also called the active low AND gate. Check more topics of Digital Electronics here. The above article on NOR Gate is intended to guide students with relevant information.

How many inputs can a NOR gate have?

The NOR gate can be cascaded together to form any number of individual inputs. There are a total of 8 possible combinations of inputs for a three-input NOR gate. The truth table and is shown below:

What is a 3-input NOR gate?

As the name signifies that the 3-input NOR gate has three inputs. The Boolean expression of the logic NOR gate is represented as the binary operation addition (+) followed by its complement. The symbolic representation of three input NOR gates is as follows: