Table of Contents
- 1 How many 2 input OR gates are needed to implement 4 input or gates?
- 2 Is it possible to replace a 4 input NOR gate with 2 input NOR gates?
- 3 Can a NOR gate have 3 inputs?
- 4 How can you make a NOR gate by using only NAND gates?
- 5 How to use 4 inputs of a 4-input NAND gate?
- 6 How do I make a 4-input and gate in a circuit?
How many 2 input OR gates are needed to implement 4 input or gates?
The number of 2-input NAND gates required to implement a 2-input XOR gate is 4.
| Logic Gates | Min. number of NOR Gate | Min. number of NAND Gate |
|---|---|---|
| OR | 2 | 3 |
| EX-OR | 5 | 4 |
| EXNOR | 4 | 5 |
| NAND | 4 | 1 |
Is it possible to replace a 4 input NOR gate with 2 input NOR gates?
Due to De Morgan’s Laws , a NOR can be written as: so it functions as an AND gate with inverted inputs. Thus the two inputs negate the inversion at the output of the two NAND gates, and the combination becomes a 4-input AND. We want to have 4 input AND gate.
Can a 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.
How do you make a NAND gate with NOR gates?
To make a NOR gate perform the NAND function, we must invert all inputs to the NOR gate as well as the NOR gate’s output. For a two-input gate, this requires three more NOR gates connected as inverters.
How do you make an AND gate out of an OR gate using inverters?
To build an inverter from NAND, simply connect the two inputs of the NAND together and use this junction as input of the inverter. Therefore an AND gate can be realized simply as a NAND followed by another NAND with 2 inputs tied together.
How can you make a NOR gate by using only NAND gates?
A NOR gate is an OR gate with an inverted output. Output is high when neither input A nor input B is high….NOR.
| Desired NOR Gate | NAND Construction |
|---|---|
| Q = A NOR B | = [ ( A NAND A ) NAND ( B NAND B ) ] NAND [ ( A NAND A ) NAND ( B NAND B ) ] |
| Truth Table Input A Input B Output Q 0 0 1 0 1 0 1 0 0 1 1 0 |
How to use 4 inputs of a 4-input NAND gate?
If you want to use 2, 3, or 4 inputs of a 4-input NAND gate, just tie 2 of the inputs high with a 10k resistor from each input to +5V. Thus any unused inputs will be high, while the used inputs can be readily pulled low, as needed.
How do I make a 4-input and gate in a circuit?
The simplest way to do that is to put the trouth table of NAND and NOR gates in front of your eyes and start looking for what you want. So, Lets think together. To get 4-Input And gate it means that it gives 1 only and only when all inputs are one.
How to make an inverter from a NAND OR NOR gate?
You make the inverter from either a NAND or NOR gate by connecting all the inputs together, or by tying the second input of a NOR gate to “0” or of a NAND to “1”. Is it possible to make a 3 input NAND or NOR gate with 2 input NAND or NOR gates?
How do you add a second input to a gate?
If you want to add another input you just connect the output of the first gate to one of the inputs of a second gate. Just repeat this process until you have the required number of inputs. For 5 inputs you will need 4 2 input AND gates. How do you make a 2-input NAND out of 2-input NOR gates?
https://www.youtube.com/watch?v=3Ld8L4VVVr4