adder Definition and Topics - 3 Discussions

In many computers and other kinds of processors adders are used in the arithmetic logic units or ALU. They are also used in other parts of the processor, where they are used to calculate addresses, table indices, increment and decrement operators and similar operations.
Although adders can be constructed for many number representations, such as binary-coded decimal or excess-3, the most common adders operate on binary numbers.
In cases where two's complement or ones' complement is being used to represent negative numbers, it is trivial to modify an adder into an adder–subtractor.
Other signed number representations require more logic around the basic adder.

View More On Wikipedia.org
1. Implementing a function using an adder and a multiplier

Homework Statement http://imgur.com/a/3Cn7c [/B]Z is an unsigned 9 bit number and X is an unsigned 3 bit number. The only available components are an 8 bit adder and a 4-bit x 4-bit multiplier. c.) We have a single 8 bit adder and a single 4-bit x 4-bit multiplier. We would like to implement...
2. Comparator design using a 4-bit adder

Homework Statement Hi, it's me again. Now I am going to design a 4-bit magnitude comparator using just ONE 4-bit adder and infinitely large number of gates (AND, OR, NOT, NAND, NOR, XOR, XNOR) for signed numbers (negative binary). Homework Equations A > B => A3barB3 + A2barB2x3 +...