4 Bit Comparator Logic Circuit. Ic of digital comparator the integrated circuit ic available for 4 bit digital comparator is ic 7485. The truth table for a 4 bit comparator would have 4 4 256 rows.
4 3 1 four bit equality comparator an equality comparator such as that illustrated in fig 4 3 1 is the simplest multi bit logic comparator and can be used for such circuits as electronic locks and security devices where a binary password consisting of multiple bits is input to the comparator to be compared with another preset word. It consists of eight inputs each for two four bit numbers and three outputs to generate less than equal to and greater than between two binary numbers. Explanation of 4 bit magnitude comparator a comparator used to compare two binary numbers each of four bits is called a 4 bit magnitude comparator.
We will compare each bit of the two 4 bit numbers and based on that comparison and the weight of their positions we will draft a truth table.
The 4 bit comparator is mostly available in ic form and common type of this ic is 7485. A comparator used to compare two binary numbers each of four bits is called a 4 bit magnitude comparator. Circuit connections for comparison of 4 bit numbers sn7485 ic is used in this project. It consists of eight inputs each for two four bit numbers and three outputs to generate less than equal to and greater than between two binary numbers.
