What we now know as TTL or Transistor to Transistor Logic is one way of building a computer chip. This has been done by a complex series of steps of manufacture that wasted much of what was made. TTL is used in instruments but the details of what instruments are used to make TTL these days in very technical and complex
AND
AND logic gate is used to obtain the product of two digits. It is used in various combinational and sequential circuits.
Nand gate .
negative logic means negative input values. so by checking the truth table, it becomes an OR gate
A logic gate is used to implement any digital logic. It may be AND, OR, XOR, NOT, XNOR, NAND, NOR. These logic gates can be used to implement the output equations of digital circuits in order to design them.
AND gate, INVERTER gate and OR gate. Hope this would help.
XNAND is a logic gate, used in electrical engineering.
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.
THE MAIN ADVANTAGE OF THE UNIVERSAL LOGIC GATES IS THAT IT CAN BE USED TO MADE ANT KIND OF LOGIC GATE .......BY USING IT . NAND AND NOR ARE CALLED AS UNIVERSAL GATES ARE USED TO MAKE ANY GAATES AS OR ,AND, XNOR,NOT. logic gates are used in many everyday electronic devices such as tv's, computers and telephones.
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.
Either XOR or XNOR can be used, but the output will be inverted on the XNOR.
A logic circuit of any complexity can be realized by using only the three basic gates (NOT, AND, and OR Gates). There are two universal gates, the NAND Gate and the NOR gate. Each of those can also realize logic circuit single-handedly. The NAND and NOR gates are therefore called universal gates.