3 Bit Magnitude Comparator Logic Diagram
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A comparator that compares two binary numbers each number having 4 bits and produces three outputs based on the relative magnitudes of given binary bits is called a 4 bit magnitude comparator.
3 bit magnitude comparator logic diagram. Magnitude comparator 3 bits and 4 bits hindi english. Logic gates an introduction. Gate 1 produces the function a b and gate 3 gives a b while gate 2 is an xnor gate giving an equality output. The output is a b in the cases of.
The truth table for a 4 bit comparator would have 4 4 256 rows. 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. A 3 bit magnitude comparator using logic gates i have been getting lot of requests asking for vhdl code for digital comparators. Users should follow proper ic handling procedures.
In this post i have shared a 3 bit comparator which is designed using basic logic gates such as xnor or and etc. 2 bit magnitude comparator a comparator used to compare two binary numbers each of two bits is called a 2 bit magnitude comparator. This basic circuit for a magnitude comparator may be extended for any number of bits but the more bits the circuit has to compare the more complex the circuit becomes. A simple 1 bit magnitude comparator is shown in fig 4 3 2.
The objective of this paper is to design such 3 bit comparator which must consume low power. The figure below shows the logic diagram of a 2 bit comparator using basic logic gates. Use data sheet to draw the schematic pin diagram of the 4 bit comparator and write down its function table given in the data sheet. Experiment 4 1 bit magnitude comparator circuit of a 1 bit magnitude comparator.
It consists of four inputs and three outputs to generate less than equal to and greater than between two binary numbers. As in today s modern world the development of digital integrated circuits is challenged by higher. The input bits can be termed as a a3 a2 a1 a0 and b b3 b2 b1 b0. 4 bit magnitude comparator duration.
The logic circuit of a 2 bit comparator how to design a 4 bit comparator. Figure a shows the block diagram of datahseet magnitude comparator. Figure a shows the block diagram of n bit magnitude comparator. It is also possible to construct this comparator by cascading of two 1 bit comparators.
So we will do things a bit differently here. This logic diagram of 2 bit comparator based on full adder module consist of four ex or gates two mux and two and gates. 3 bit logic diagram 4 bit magnitude comparator. The truth table for a 2 bit comparator is given below.
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