Why you use NAND and NOR gates instead of basic gates?
Mainly because you can make any other gates only with these (instead of getting 5 different sets of gates, you just use a single one -NOR or NAND- and achieve the same goal)
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actually any digital circuit can be designed by using only any one type of gates either nand or nor that's why they are called as universal gate. even basic logic gates AND ,OR,NOT can also be designed using them.now choosing one of two (nor n nand) depends on if logic expression is of sop type or p…os type. by-ramendra for more info contact email@example.com . They are called universal gates because all of the other gates may be constructed using only those two gates. That is important because it's a lot cheaper in practice to make lots of similar things than a bunch of different things (different gates). Simple, huh? - By MANOJ GUJARI . It's easy and cheaper to design NAND or NOR gate using CMOS (4 transistors). ( Full Answer )
\nwhen the two inputs are shorted, a NAND gate acts like a NOT gate.\n. \nhence\nAND = NAND + NOT\n. \nFor OR gate, inverse both the inputs before connecting them to a NAND gate. So three NAND gates would be needed.
The XOR gate (sometimes EOR gate , or EXOR gate ) is a digital logic gate that implements an exclusive or; that is, a true output (1) results if one, and only one, of the inputs to the gate is true (1). If both inputs are false (0) or both are true (1), a false output (0) results. Its behavior i…s summarized in the truth table shown on the right. A way to remember XOR is "one or the other but not both". It represents the inequality function, i.e., the output is HIGH (1) if the inputs are not alike otherwise the output is LOW (0). ( Full Answer )
This question really needs a little more context, but an attempt would be: 1: Properties common to both NAND and NOR gates: - they are both electronic logic circuits (as implied by the term "Gate") - they both compute a primitive single valued Boolean function of two or more input terms - t…hey both implement the inverted output version of their primitive (the leading 'N') - there are no families of logic components that implement one and not the other in their catalog 2: differences: - the NAND output is TRUE iff any of its inputs are FALSE - the NOR output is FALSE iff any of its inputs are TRUE - the NAND circuit is much simpler to implement than NOR (NB: the term 'iff' means 'if and only if' - it is not a typo) ( Full Answer )
Given two inputs, A and B.. Use one NAND as an inverter (one source to both inputs) for A. Do the same for B.. Use one NAND gate with inputs \A (not A, the output from the first gate) and B. Use one NAND gate with inputs A and \B.. Use one last NAND gate with inputs coming from the two previo…us gates.. Its output will behave like an XOR gate.. Alternatively:. Gates G1, G2, G3, G4, arrange in a diamond with G1 and G4 at the left and right vertices, A input along top edge, B input along bottom edge. G2 at top center, G3 at bottom center. A goes to G1 and G2, B goes to G1 and G3, G2 and G3 go to G4. . Net list:. A - G1i1. A - G2I1. B - G1i2. B - G3I2. G1o - G2i2. G1o - G3i1. G2o - G4i1. G3o - G4i2. G4o - A^B ( Full Answer )
A NAND gate can be used to construct other logic gates such as AND, OR, NOR and others. This is why it is called a universal gate.
NAND AND NOR gates are called universal gates , becaus with a combination NAND and NOR gates alone, it's possible to create all other logic gates like AND, OR, XOR etc and you can design any logic circuit.. eg: inverter-- nand with inputs shorted. and ------ nand followed by a inverter(using nan…d). or--------- giving inverted inputs to nand gate. ( Full Answer )
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.. In fact, an AND gate is typically implemented as a NAND gate followed by an. inverter not the other way around!!. Likewise, an OR gate is typically implemented as a NOR gate followed by an inverter. not the other way around!!. 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.. In fact, an AND gate is typically implemented as a NAND gate followed by an. inverter not the other way around!!. Likewise, an OR gate is typically implemented as a NOR gate followed by an inverter. not the other way around!!. can be combined to produce AND, OR,NOT,XOR . and XNOR gates ( Full Answer )
Short the inputs together. Logic: A High input, with the inputs shorted together, will be H+H at the input side of the NAND gate, therefore resulting in a low output. A Low input, with both inputs shorted together, is L+L for inputs, resulting in a High output. Also, a NOR gate can be used …in exactly the same way. ( Full Answer )
Making a full subtractor using nand gates is very similar to makinga half subtractor using nand gates. All you would do is constructthe adding a whole adder.
You can build any other logic gate out of NAND gates (or NOR gates, or both). They are a simple building block for logic circuits and easily implemented in silicon.
A -> nand -> a' b -> nand -> b' a' b' -> nand -> a+b
AND gate is A.B If two not gates are added at both inputs of and gate then output becomes A'.B' which is equal to (A+B)' by DeMorgan's law. hence the nor gate is formed Update: Put more simply, invert A and B by attaching A to both inputs of one NOR and attaching B to both inputs of another N…OR, then NOR the results of the previous two NOR gates. Total of three NOR gates in a two-level implementation. NAND can obviously be created by inverting the result. ( Full Answer )
electron mobility in nand 3 times more tat of nor gate. This makes nand faster than nor.
its bcoz all other gates lik AND,OR,NOT,XOR...........etc.u can achieve the functionality of these gates with the help of NAND and NOR.u can replace all these gates in a circuit wit the help of NAND and NOR. so that's y they r called as universal gates
negative logic means negative input values. so by checking the truth table, it becomes an OR gate
They r called universal gates as they can be used 2 design all other logic circuit elements like XOR,NOR,etc. also these gates can be realized through easy combination of diodes thus making them easy 2 use base elements in any chip designing project.
If you tie the two inputs on a NOR gate together and use that as a single input, you will create a simple NOT gate.
NAND gate is nothing but a AND gate with a NEGATION at its output. Its truth table is. INPUT1 INPUT2 OUTPUT . 0 0 1 . 0 1 1 . 1 0 1 . 1 1 0 .
Implemention of Chip (when considering power and area of the chip) with NAND gate is easier as compared to NOR gate that's by we use NAND gate.
XORing X with 1 gives X', i.e., NOT(X). If we are able to construct a NAND (AND) using XOR, we can also obtain AND (NAND) from it, which makes XOR a universal gate since inverted inputs to a NAND (AND) will give OR (NOR). However XOR is not a universal gate! Therefore we cannot obtain NAND (AND) usi…ng XOR. :-) By, Tirtha Sarathi Ghosh Class 10 IIT Kanpur Aspirant ( Full Answer )
A NAND gate can be used as an oscillator or as an amplifier in a very rudimentary transmitter. (If both inputs of a NAND gate are tied together, it inverts the incoming signal. Chain two NANDs together with the outputs fed back through a crystal and you have a quick, easy oscillator. Chain another N…AND or two or three with the inputs tied together and the output right into another NAND and you have a simple low power amplifier.) ( Full Answer )
b'coz t mobility of electrons in NAND gate is 3 times higher than that of NOR gate
draw its cmos equivalent and give its output to pull up bjt.then draw nmos block of the logic and connect its drain to
Nand, Nor, And, and Or gates are the most commonly used logic circuits. We also have XAnd, Xor and Inverting gates. Most electronic components producers make variations of these gates but their functionality are the same. In other words universal. These gates make up the basic foundation in all co…mputers, large or small, fast or slow. They have found their uses in the millions. Some circuits are designed for high current. Others for very very low current. Some can be used with high voltage (16 volts). others can be used with voltages as low as 1.2 volt. ( Full Answer )
Z = Â¬( Â¬(A * B) * Â¬( Â¬(A * A) * Â¬(B * B) ) The above requires 5 NAND gates, but it has race conditions thatmay give problems in some applications. See if you can reduce therace conditions.
A: For one thing is to negate the function but also provide buffering since an active components must be added. AND gate can be just two diodes
A: There is no NOT gate NOT is a term used to signify that the function is negated like OR becomes NOT if the output is negated by an inversion of the final signal. The difference in gates OR and NOR are symbolic designated as a small circle on the output IMPROVED: To get an Not gate from a NAND… gate you start with the NOT gate then followed by the NAND gate to get an equivalent of NOT gate using these two gates. ( Full Answer )
You can use a second gate on the same IC to invert the output (most OR-gate ICs I know of have 4 gates per chip). Do this by tying the output of the first gate to both inputs of the spare gate.
Bcoz with the help of these gates we can make any gate i:e and , or , not etc
A NAND gate produces as output the inversion of the AND operation on it's inputs. So, since an AND gate only has high output when all inputs are high, a NAND gate will only have low output when all it's inputs are high. The NAND gate is particularly significant because NAND is a complete set in term…s of logic operations, that is, with only NAND gates, you can simulate any logic function. ( Full Answer )
A: A NOR gate will have a true "1" output only if all inputs are false ''0'. A NAnd gate all inputs must be true '1' for the output to be false '0'.
yes,nand gate is universal gate..because we can create NOT,OR,AND,EX-OR with the help of nand gate.
an 2 input AND gate can be realize using 3 NOR gates. . Let ,A and B are the input and x be the output. x=A.B= NOR ( NOR (A) NOR (B)).
An AND gate gives a 1 or True output only and only if all the inputs are True or 1. If even a single output is False or 0, it will not give any output meaning thereby that the output will be False or 0. A NAND gate is quite the reverse of an AND gate and gives an output of 1 or True only if both th…e inputs are not True or 1. This means that even when both inputs are 0 or False, it still gives a True or 1 output. ( Full Answer )
A nand gate can be made from an and gate by introducing an inverter at the output of the gate.
NAND/NOR gates are called universal gates because combinations of them can be used to create all the basic logical functions. http://wiki.answers.com/Q/Why_NAND_gates_and_NOR_gates_in_logic_circuits_are_universal_gates
No. A large percentage of chips are DRAMs and they are primarily comprised of single-transistor cell arrays.
The nand gate is prefered over the nor gate because for a nand gate, all other states are true except the 1 1 state which is false while for a nor gate all other states are false except the 0 0 state which is true.
P = (!(!A+B)) + (!(A+!B)) Tie the NOR inputs together to make a NOT. Brackets indicate one output. Exclamation marks indicate inverted output. Dogpile De Morgan's NAND and NOR laws. Hope this helps :)
the conversions of the gates from one to the another may seem complex if tried at once... but some mathematical operations will give best instant solutions!! we have to write the needed function in terms of the function in form of which to be converted!! see... xor gate is AB'+BA' taking its comple…ment we get..... (AB'+BA')' now =(AB')' (BA')' the complement of this gives again our given function.. so xor is also ((AB')' (BA')')' now nand happens to be.... (A NAND (B NAND B)) NAND (B NAND (A NAND A)) ( Full Answer )
an 2 input AND gate can be realize using 3 NOR gates. . Let ,A and B are the input and x be the output. x=A.B= NOR ( NOR (A) NOR (B))
by combining nand gate and nor gate we can implement all other gates.that is why they are called universal gates
You can make them universal by simply adding an inverter to the end of the gates if you needed to make it do the opposite of what it is designed to do. make positive into negative and vice versa.
Short the two inputs of the NAND gate, so that only one input is needed. Now apply the desired input ie '0' or '1'. The output will be of a NOT gate.
Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contents Using NAND gates NOT . Figure 12.10: Realizing a NOT gate using a NAND gate . OR The following statements are called DeMorgan's Theorems and can be easily verified an…d extended for more than two variables. . (12.1). (12.2). (12.3). (12.4). In general: . (12.5). Thus :. (12.6). Now it is easy to see that , which can be checked from the truth table easily. The resulting realization of OR gate is shown in 12.11 . Figure 12.11: Realization of OR gate by NAND gates . AND gate . Figure 12.12: Realization of AND gate by NAND gates . X-OR gate . (12.7). Clearly, this can be implemented using AND, NOT and OR gates, and hence can be implemented using universal gates. . Figure 12.13: X-OR gate . X-NOR gate . (12.8). Again, this can be implemented using AND, NOT and OR gates, and hence can be implemented using universal gates, i.e., NAND or NOR gates. . Figure 12.14: X-NOR gate . Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contents ynsingh 2007-07-25 ( Full Answer )
A 2 input NAND gate requires 4 NOR gates. . A 3 input NAND gate requires 5 NOR gates. . A 4 input NAND gate requires 6 NOR gates. . etc.
A NAND gate is an inverted (Negated) AND. It has a truth table as follows: A B C 0 0 1 0 1 1 1 0 1 1 1 0
1. NAND gate is used to invert the input A (by connecting A to both inputs). 2. NAND gate used to invert B the same way 3. Now put A' and B' into into a third NAND gate. The output will be (A'B')' which is equivalent to A+B.
NAND and NOR gates are able to create any electronic circuits bythemselves, without any other gates!