full adder

It is possible to create a logical circuit using multiple full adders to add N-bit numbers.

We also saw how to combine these gates together into higher-level functions, such as full adders.

Reduce the number of partial products to two layers of full and half adders.

The second set of 2 full adders would add the last two bits assuming is a logical 0.

And the final set of full adders would assume that is a logical 1.

Serial binary addition is done by a flip-flop and a full adder.

Thus, a truth table of eight rows would be needed to describe a full adder's logic:

So this carry ripples down through these full adders to produce a result.

And then the final stage of this full adder, it produces a carry which in computers is often called the "overflow bit."

Take any three wires with the same weights and input them into a full adder.