Logic Diagram Of 1 Bit Comparator. 2 bit comparator a 2 bit comparator compares two binary numbers each of two bits and produces their relation such as one number is equal or greater than or less than the other. Logic diagram for the 74682 8 bit.
Block diagram of comparator. Logic diagram for the 74682 8 bit. Block diagram of n bit magnitude comparator the circuit for comparing two n bit numbers has 2n inputs 22n entries in the truth table for 2 bit numbers 4 inputs 16 rows in the truth table similarly for 3 bit numbers 6 inputs 64 rows in the truth table 2.
Equality condition of two bits can be checked by the basic ex nor gate.
11 shows the block diagram of a two bit comparator which has four inputs and three outputs. A comparator is shown as figure 21. Building 4 bit magnitude comparator using 7485 ic. In t wo bit comparator the number a and b is represented in two bits a0a1 and.