3 Bit Magnitude Comparator Truth Table. The truth table for a 4 bit comparator would have 4 4 256 rows. 74ls85 or sn54 7485 is a 4 bit magnitude comparator of two binary format inputs.
To solve this issue we use ttl based comparators the basic function of the comparator is to compare the two input bits and then give the three outputs. 2 bit magnitude comparator a comparator used to compare two binary numbers each of two bits is called a 2 bit magnitude comparator. The input bits can be termed as a a3 a2 a1 a0 and b b3 b2 b1 b0.
When a0 b0 00 11 both inputs are equal therefore a b output will be high.
The logic circuit of a 2 bit comparator how to design a 4 bit comparator. The figure below shows the block diagram of a single bit magnitude comparator. When a0 b0 00 11 both inputs are equal therefore a b output will be high. The logic circuit of a 2 bit comparator how to design a 4 bit comparator.
