Xor gate using nor gate pdf

A nor gate is a logic gate which gives a positive output only when both inputs are negative. Therefore, an and gate is made by inverting the inputs to a nor gate. A logic gate is a building block of a digital circuit. Theory the output of xor gate, is logic 1 when both inputs are different, and is logic 0 when inputs are the same, fig. How a logic circuit implemented with aoi logic gates could be reimplemented using only nor gates that using a single gate type, in this case nor, will reduce the. Hence a nor gate is made up from a or gate which is followed by an inverter. More than two inputs xor operation is that, when odd number of inputs in the gate are 1, the output is 1 and when none or even number of inputs are 1, the output is logical 0. For example, the, apollo guidance computer, was built exclusively from nor gates, about 5,600 in total for the later versions. Digital logic basics 21 implementation using nand gates. Then the logic exclusivenor gate is the reverse or complementary form of the exclusiveor gate, a. Mar 30, 2020 as we told already, that xor gates are two inputs gate, but xor operation of more than two inputs then can be realized by using more than one or two inputs xor gate. And, or, not, nand not and, nor not or, xor, and xnor not xor later building functions.

Sep 07, 2015 the word nor gate is just an short form of the not and or gate combination. The schematic of xor gate using cmos logic is shown in figure 4. Logic gate actually the term logic is applied to digital circuits used to implement logic functions. From transistorsto logic gates and logic circuits prof.

Boolean logical algebra prove 4 nor gates to an xnor gate. Here you will get the articles of mechanical engineering in brief with some key points and you will get to know an enormous amount of knowledge from it. Then the output of a digital logic exclusivenor gate only goes high when its two input terminals, a and b are at the same logic level which can be either at. Logic gates digital circuit that either allows a signal to pass through it or not. Several kinds of digital logic circuits are the basic elements that form the building blocks for such complex digital system as the. May 24, 2014 logic gates and, or, not, nor, nand, xor, xnor gates.

Logic gates not, or, and, nor, nand, xor, xnor gate, pdf. Logic gates and truth table and, or, not, nor, nand, xor, xnor. Aug 21, 2017 i prepared xnor gate using 4 nor gates and xor gate using 5 nor gate using 2 methods. Oct 27, 2009 this file is licensed under the creative commons attributionshare alike 3.

If you take another nor gate and add an inverter to every input that gives you the funcionality of an and gate. So today we will study the complete details on logic gates not, or, and, nor, nand, xor, x nor gate, pdf. Exclusiveor xor digital logic gate electrical technology. I prepared xnor gate using 4 nor gates and xor gate using 5 nor gate using 2 methods. I would like to know what the process for deriving this would look like. The restrictions for this problem are that the nor gate only excepts 2inputs and it must only use and and xor gates. All nor input pins connect to the input signal a gives an output a. Hence the truth table for the xor gate is shown as follows and the symbol for it can be seen in figure below along with its truth table. Most logic gates have two inputs and one output and are based on boolean algebra. An exnor gate can be designed by using basic logic gates like nand gate and nor gate. Simulation results illustrate the superiority of the. The logic symbol for an exclusivenor gate is simply an exclusiveor gate with a circle or inversion bubble.

Digital circuitsnor logic wikibooks, open books for an. It literally means exclusive or, in the sense of one or the other, but not both. But there are two other types of digital logic gates which although they are. Depending on the type of logic gate being used and the.

How an nor gate can be using to replace an and gate, an or gate or an inverter gate. Alloptical multiple logic gates with xor, nor, or, and nand functions using parallel soamzi structures. Xor gate sometimes eor, or exor and pronounced as exclusive or is a digital logic gate that gives a true 1 or high output when the number of true inputs is odd. Help explain this boolean equation xor with nor gates. Neural representation of and, or, not, xor and xnor logic.

These two hybrid logic gates are called the exclusiveor exor gate and its complement the exclusivenor exnor gate. As a result, xor gates are used to implement binary addition in computers. Hence we need only 4 nor gates to implement xnor gate and we require 5 nor gates to implement xor gate with 5 th nor gate used as inverter and placed in front of 4 th nor gate. At any given moment, every terminal is in one of the two binary conditions false high or true low. If it used nand gates i would of completed this problem already haha. The and gate is so named because, if zero is named false and one is named. Exclusiveor gate tutorial with exor gate truth table. Logic gates a b out 0 0 0 0 1 1 1 0 1 1 1 1 a b out 0 0 0 0 1 0 1 0 0. Exclusivenor gate tutorial with exnor gate truth table.

The figure shows two ways in which a nor gate can be used as an inverter not gate. Nov, 2018 while taking the udacity pytorch course by facebook, i found it difficult understanding how the perceptron works with logic gates and, or, not, and so on. Jul 15, 2015 if a specific gate is not available directly, we can design the gate by connecting multiple gates together. What are the applicable uses of xor gates in laymans.

Each output and output of a logic gate is represented by binary conditions 0 low and 1 high. When drawing circuits containing logic gates it is common to use logic symbols. While taking the udacity pytorch course by facebook, i found it difficult understanding how the perceptron works with logic gates and, or, not, and. The pulsed operation of 2 input xor gate is shown below. Used to build logic functions there are seven basic logic gates. In the previous tutorials, we saw that by using the three principal gates, the and gate, the or gate and the not gate, we can build many other types of logic gate functions, such as a nand gate and a nor gate or any other type of digital logic function we can imagine. In this paper propose a new high performance 1 bit full adder cell using xor xnor gate design style as well as lower power consumption. Logic gates and, or, not, nor, nand, xor, xnor gates. Xor and and form a universal set of gates which i completed a proof of. Only use nfets to pull the output down and pfets to pull the output up. How to derive xor from only nor gates physics forums.

One nor input pin is connected to the input signal a while all other input. This construction entails a propagation delay three times that of a single nor gate and uses five gates. Today, contrary to popular belief, integrated circuits are not constructed exclusively from a single type of gate. Anne bracy cs 3410 computer science cornell university the slides are the product of many rounds of teaching cs 3410 by professors weatherspoon, bala, bracy, and sirer. So today we will study the complete details on logic gatesnot, or, and, nor, nand, xor, xnor gate, pdf. Jan 06, 2018 first you can make an inverter not gate from a nor gate by tying all its inputs except one to ground. Schematic of xor using cmos logic by using transmission gates logic, the number of transistors is reduced from the conventional cmos xor gate. Pdf alloptical multiple logic gates with xor, nor, or, and. Implementing and using only nor gates an and gate can be replaced by nor gates as shown in the figure the and gate is replaced by a nor gate with all its inputs complemented by nor gate inverters thus, the nor gate is a universal gate since it can implement the and, or and not functions. Hi, through some searching and guessing with logisim i was able to see how to build a xor gate from only nor gates. An xor is known as exclusiveor gate and is almost similar to an or gate with the only difference that when both the inputs are 1 or true, the output is 0 or false, unlike an or gate. Pdf by using the cross gain modulation xgm characteristics of semiconductor optical amplifiers soas, multifunctional alloptical logic gates. Design of basic logic gates using nor gate not, or and and. The output of the xor gate is a 1 if either but not both inputs are.

To study the logic function of exclusive or xor gate, and become familiar with some of its applications. Xor gate is a digital logic gate that gives a true 1 or high output when the number of true. Logic gates and truth table and, or, not, nor, nand, xor. For example, the first embedded system, the apollo guidance computer, was built exclusively from nor gates, about 5,600 in total for. What are the applicable uses of xor gates in laymans terms. Like nand gates, nor gates are socalled universal gates that can be combined to form any other kind of logic gate. Digital logic or gate digital gates electrical technology. What is logic gate and, or, xor, not, nand, nor and xnor. From switches to transistors, logic gates and logic circuits hakim weatherspoon cs 3410, spring 20 computer science cornell university. An xor gate is used for figuring out whether the number of input bits is odd 00 and 11 are even, 01 and 10 are odd. Oct 08, 2010 hi, through some searching and guessing with logisim i was able to see how to build a xor gate from only nor gates.