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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
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoits 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
Wiki User
∙ 13y agoNAND/NOR gates are called universal gates because combinations of them can be used to create all the basic logical functions.
Why_NAND_gates_and_NOR_gates_in_logic_circuits_are_universal_gates
Wiki User
∙ 11y agoYou 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.
Wiki User
∙ 13y agoAll other gates can be made from NAND or NOR gates.
Wiki User
∙ 14y agoA 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.
Wiki User
∙ 13y agoBcoz with the help of these gates we can make any gate i:e and , or , not etc
Wiki User
∙ 12y agoby combining nand gate and nor gate we can implement all other gates.that is why they are called universal gates
Wiki User
∙ 12y agoNo, the only universal gates are NAND & NOR, all combinatorial logic networks can be built using only one of these types, this is not true of other gates.
Wiki User
∙ 11y agoA NAND (or NOR) gate is considered a universal gate because all possible logic circuits may be constructed using only that type of logic gate.
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What is universal logic gate?
universal logic gate is a gate using which you can make all the logic gates there are two such gates NOR gate and NAND gate
The OR gate can be converted to the NAND function by adding----gate to the input of the OR gate?
Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates ContentsUsing NAND gatesNOTFigure 12.10: Realizing a NOT gate using a NAND gateOR The following statements are called DeMorgan's Theorems and can be easily verified and 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 12.11Figure 12.11: Realization of OR gate by NAND gatesAND gateFigure 12.12: Realization of AND gate by NAND gatesX-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 gateX-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 gateNext: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contentsynsingh 2007-07-25
How do you make a nand gate using xor 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) using XOR. :-) By, Tirtha Sarathi Ghosh Class 10 IIT Kanpur Aspirant
How do you draw Nand gates to function to like an And gate?
pass the inputs through an nand gate and again pass them through inverter,which is again formed by an nand gate
Which gate is equivalent to bubbled AND gate?
nand gate
Is xor gate is a universal gate?
No, XOR gate is a not a universal gate. There are basically two universal gates NAND and NOR.
Which is the universal gate nand or nor?
Both are universal gates.
How can you replace end gate or gate and not gate with a nand gate?
when the two inputs are shorted, a NAND gate acts like a NOT gate. hence AND = NAND + NOT For OR gate, inverse both the inputs before connecting them to a NAND gate. So three NAND gates would be needed.
When is that the 'NAND' logic gate can function as a 'NOT' logic gate?
When the two input terminals of a NAND gate are short circuited, it acts as a NOT gate.
What is universal gates?
Any logic gate from which all other logic gate functions can be derived. The two universal gates are NAND and NOR.
What is universal logic gate?
universal logic gate is a gate using which you can make all the logic gates there are two such gates NOR gate and NAND gate
Why universal gate is called universal?
That title of "Universal Gate" is reserved for NAND gates because you can build all possible logic using only NAND logic . You can build even other basic logic like AND, OR and NOT using NAND.
Can NAND gate acts a ANDgate?
Yes, but only if its output is logically inverted (a AND gate's behavior is a direct opposite of a NAND gate's behavior, logically).
An example of a universal building block is?
NAND and NOR gate
What is the definition of universal gate?
universal gates are the ones from which we can design other gates also. for eg. NAND and NOR gates. they help in forming the uniformity in the circuits.
Why NOR gate is called universal gate?
That title of "Universal Gate" is reserved for NAND gates because you can build all possible logic using only NAND logic . You can build even other basic logic like AND, OR and NOT using NAND.
Symbol of universal gate?
The two categories for logic gates are basic logic gates and universal gates. Gates are identified by their function and universal gates are identified as NAND gate or NOR gate.
