4 Bit Comparator Circuit. A comparator is often an operational amplifier without feedback between the inputs and output. The 4 bit comparator is mostly available in ic form and common type of this ic is 7485.
Like two 4 bit comparators can be cascaded for comparison of 8 bit numbers. Seeing from the above diagram we can use 11 gates to implement the 4 bit comparator beside the inverters. A digital comparator can be 4 bit 8 bit 16 bit 32 bit or 64 bit system depending upon it compares 4 bit 8 bit 16 bit 32 bit or 64 bit numbers respectively.
For more bit comparison more than one such ics can be cascaded.
For more bit comparison more than one such ics can be cascaded. 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. More than one comparator can also be connected in cascade arrangement to perform comparison of long numbers. A comparator used to compare two binary numbers each of four bits is called a 4 bit magnitude comparator.
