3
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.
12
realize X-OR gate using nand gate?
the not gate applied to and gate is nand gate
two nand gates
A nand gate can be made from an and gate by introducing an inverter at the output of the gate.
74ls00 is the ic no. Of nand gate
nand gate
A&B = ((A&B)')' So two, it would go a - | ==NAND--=NAND-- b - | By using two NAND gates back-to-back, you can create a normal AND gate.
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.
Connect the two inputs of the NAND gate together.
A: A AND gate becomes a NAND when the output is merely negated or inverted