# Digital Logic 8 Bit Full Adder Circuit

• Comp Sci
• ver_mathstats
Can you show what you are given, and then comment on what a 16-bit adder looks like when you search for it on Google Images?In summary, Essentials of Computer Architecture by Douglas Comer suggests that a half-adder can be created using an or gate and an and gate, while the textbook for the practice questions given to us suggests that an 8-bit full adder can be used instead. I do not think that 16 1 bit adders are the same as 1 16 bit adder, as they are two different types of circuits. Furthermore, I think that a 16-bit adder mightf

#### ver_mathstats

Homework Statement
We are given two 8-bit full adders, we must create a circuit that will add 2 16-bit numbers.
Relevant Equations
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I am unsure of how to approach this problem, we begin with two 8-bit full adders, is the goal to just combine them in some way so that it becomes one entire circuit while also adding NAND and NOR gates where necessary? By the end will we then have 16 1-bit full adders?

How are you "given" them? As block diagrams, as gate-level circuits, as Verilog or VHDL code?

Can you show what you are given, and then comment on what a 16-bit adder looks like when you search for it on Google Images?

I read this as a circuit that has two 16 bit inputs and a single 16 bit output (plus a carry out bit, I guess?) that is the sum of the inputs. Your job is too design that circuit primarily using two 8 bit full adders plus simple logic if needed.

I don't think 16 1 bit adders are the same as 1 16 bit adder.

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How are you "given" them? As block diagrams, as gate-level circuits, as Verilog or VHDL code?

Can you show what you are given, and then comment on what a 16-bit adder looks like when you search for it on Google Images?
In the textbook that I'm reading Essentials of Computer Architecture by Douglas Comer a half-adder is shown with an or gate and an and gate, however for the practice questions we're given, we were now told one 8-bit full adder which can be drawn as a block is sufficient, not individual 1-bit adders which I just learned right now, so I may have a better understanding now by just learning this and have to somehow connect the two using NAND and NOR gates.

What is the difference between a full adder and a half adder? How do you think this could help combine 2 full adders together?
You do not need any extra gates

I don't think 16 1 bit adders are the same as 1 16 bit adder.
Nor do I...