Wednesday 18 May 2016

Why NAND and NOR gate is called universal gates

Best answers :~

  •  NAND and NOR gates are called universal gates because they can be used in place of all basic gates that AND ,OR and NOT.
    They can be used to implement any circuitory. We can use only one type of universal gate to implement any circuit.

    Gates are used as switches.
    They use a set of output signals to produce the desired output signal.

  • All other gates/functions can be implemented by NOR or NAND gates. so they are called universal gates. In fact, in chips, entire logic maybe built using only NAND (or NOR) gates. eg: inverter-- nand with inputs shorted. and ------ nand followed by a inverter(using nand). or--------- giving inverted inputs to nand gate. If you delve deep into realms of VLSI you maybe able to understand the reason .Implementing with NAND is easier when considering power and area of the chip.

  • NAND and NOR gates are called universal gates because they can be used in place of all basic gates that AND ,OR and NOT. They are inexpensive to make and they can be used to make any circuit thoughcan use only one type of universal gate to make any circuit. 
    Gates are mainly switches which can be used to decide the output of any input.They can be used to get desired results by givin inputs.

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