Table of Contents
- 1 Are NAND and NOR the only universal gates?
- 2 Why NAND gates are preferred over NOR gates for logic design?
- 3 Why are NAND NOR gates considered as universal gates in CMOS?
- 4 What is NAND gate in digital electronics?
- 5 How many NAND gates are required for NOR?
- 6 Which of the following are known as universal gates * 2 points NAND & NOR AND & OR XOR & OR ex NOR & XOR?
Are NAND and NOR the only 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. 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 NAND gates are preferred over NOR gates for logic design?
In general, cells are designed to have similar drive strength of pull up and pull down structures to have comparable rise and fall time. NAND gate has better ratio of output high drive and output low drive as compared to NOR gate. Hence NAND gate is preferred over NOR.
Why are NAND NOR gates considered as universal gates in CMOS?
NAND and NOR are called universal gates because all the other gates like and,or,not,xor and xnor can be derived from it. Although and,or and not are basic gates but each of their functionality can be derived using nand and not as well.
Are processors made of NAND gates?
The simplest CPU has the following architecture, no matter what cells or circuits it is realized with: Indeed, “Soft CPUs” or Virtual Machine s and Emulators are often made from Logic Gate Cells which can be all NAND structures.
Why NAND NAND realization is preferred over and realization?
Explain why NAND-NAND realization is preferred over AND-OR realization? NAND-NAND realization needs only one type of gate(NAND), that minimizes IC package counter. 18. NAND gate is called universal gate because any digital system can be implemented with the NAND gate.
What is NAND gate in digital electronics?
In digital electronics, a NAND gate (NOT-AND) is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW (0) output results only if all the inputs to the gate are HIGH (1); if any input is LOW (0), a HIGH (1) output results.
How many NAND gates are required for NOR?
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 |
|---|---|---|
| NAND | 4 | 1 |
| NOR | 1 | 4 |
| Half-Adder | 5 | 5 |
| Half-Subtractor | 5 | 5 |
Which of the following are known as universal gates * 2 points NAND & NOR AND & OR XOR & OR ex NOR & XOR?
Which of the following are known as universal gates? Explanation: The NAND & NOR gates are known as universal gates because any digital circuit can be realized completely by using either of these two gates, and also they can generate the 3 basic gates AND, OR and NOT.
Is not a universal gate?
Note that combined these three logic gates can implement all of the possible Boolean switching functions, but not individually. Hence unlike the NOR and NAND logic gates, they are not classified as universal gates.