is a memory circuit

gives an output when all input signals are present simultaneously

is a -ve OR gate

is a linear circuit

Parallel adder

Carry-look-ahead adder

Carry-save-adder

Full adder

1⊕0 = 1

1⊕1 ⊕ 0 = 1

1⊕1⊕1 = 1

1⊕1 = 0

A⊕ C = B

B⊕ C = A

A⊕ B⊕ C = 0

Both (a) & (b)

Vcc

Gnd

Pin 14

Pin 1