The output of comparator is usually 3 binary variables indicating. Designing the circuit with optimal constraints of vlsi is the need for every designer. Waveform of 2bit magnitude comparator using transmission gate logic style consider input bits 0100 then according to truth table in output side 1. Solved 6 you are to design a new 2 bit comparator the d pdf. In this post, we will make different types of comparators using digital logic gates. Design of 1bit and 2bit magnitude comparators using electrooptic effect in machzehnder interferometers. From the above truth table kmap for each output can be drawn as. Whether the first number is less than, equal to or greater than the third number. Bit magnitude comparator and is a functional pinout duplication of the standard mecl 10k part with 100% improvement in propagation delay and no increase in power. Interprets its inputs as signed or unsigned numbers and indicates their arithmetic relationship greater or less than 2 3of 12 example comparator use.
This 2bit comparator which is designed by the approach of ptl provides good performance by. Design of bcd to 7 segment driver for common anode. And compile the circuit and correct all errors if you have any. The inputs are a0, a1 and b0, b1 which provided 0 to 16 bits for input to analysis of output that will provide the circuit analysis. Designers would normally like to go for lowest level of design. The 2bit magnitude comparator is designed which provide the three output. The hcf4063b is a low power 4bit magnitude comparator designed for use in computer and logic applications that require the comparison of two 4bit words. We will begin by designing a simple 1bit and 2bit comparators. Design and analysis of low power 2bit and 4bit digital. A comparator used to compare two binary numbers each of two bits is called a 2bit magnitude comparator. Design of 2 bit comparator using conditional operator verilog code. Introduction in this report it is clearly illustrated how to design a 2bit comparator circuit.
Realization and implementation of 2bit comparator using logic gates on. It is also reported how we simplified the design to use the least number of ics. Digital comparator and magnitude comparator tutorial. Designing a 2 bit magnitude comparator duplicate ask question. Pdf design of 1bit and 2bit magnitude comparators using electro. This function requires a magnitude comparator, generic synthesis. Pdf performance analysis of magnitude comparator using. Comparator designing 1bit, 2bit and 4bit comparators. Magnitude comparator is a combinational logic circuit that compares between two. The truth table for a 2bit comparator is given below. Low power design of a two bit mangitude comparator for high speed operation.
A b f ab f ab f a file extension will depe nd upon the hdl language that is being used in your course. Design of 2 bit comparator using conditional opera. The circuit for a 4bit comparator will get slightly more complex. Keeping the same in mind a new design of 2bit gdi based magnitude comparator has been proposed and.
Magnitude comparator a magnitude comparator is a digital comparator which has three output terminals, one each for equality, a b greater than, a b and less than a file and draw the circuit for 2bit magnitude comparator circuit in the figure 92. Block diagram of 2 bit comparator download read online. Design of 2 bit comparator using conditional operator. Design of 2 bit comparator using whenelse statement vhdl. A magnitude digital comparator is a combinational circuit that compares two. A digitalmagnitude comparator is a logic circuit that is used to compare the magnitude of two binary numbers say a and b. Areapower efficient design of gdi 2bit magnitude comparator in. Magnitude comparator in digital logic geeksforgeeks. Similarly we can have 2 bit comparator and the table to list all the combinations at input and their corresponding outputs is as. Magnitude comparator is a combinational circuit that compares to numbers and determines their relative magnitude. What i am trying to get my head around is a 2 bit magnitude comparator circuit that takes in 2 sets of inputs.
Efficient implementation of 2bit magnitude comparator. A digital comparator s purpose is to compare numbers and represent their relationship with each other. Here we use microwind to draw the layout of the cmos circuit. Design had been successfully tested by proteus simulation software. A magnitude digital comparator is a combinational circuit that compares two digital or binary numbers consider a and b and determines their relative magnitudes in order to find out whether one number is equal, less than or greater than the other digital number. Truth table 7485 7485 4bit magnitude comparator truth table 74ls85pc 7485pc 7485 truth table comparator 74ls85a 7485 comparator 4. Magnitude comparator a magnitude comparator is a digital comparator which has three output terminals, one each for equality, a b greater than, a b and less than a comparator is to compare a set of variables or unknown numbers, for example a a1, a2, a3. This logic circuit determines whether one 4bit word binary or bcd is less than, equal to or greater than a second 4 bit word. Magnitude comparator a magnitude comparator is a digital comparator which has three output terminals, one each for equality, a b greater than, a b and less than a b, ab and a pdf document tags. Full vhdl code together with test bench for the comparator is provided. Bit magnitude comparator description the mc10h166 is a 5. The design is done using full adder circuit in mentor graphics eldo net tool.
My initial plan was to somehow reuse the 1 bit comparator and reuse it 3 times but every time i end up with something that ends up with an overly complicated. Solved problem design a 2 bit magnitude comparator a 2 b pdf. Design of 2 bit comparator using whenelse statement data flow modeling style output waveform. Area, power and delay efficient 2bit magnitude comparator using. The 180 nm technology, file is used for the design of the magnitude comparator. It consists of four inputs and three outputs to generate less than, equal to and greater than between two binary numbers. Request pdf 2bit magnitude comparator using gdi technique in recent years, low power design has become one of the prime focuses for the digital vlsi circuit. A magnitude digital comparator is a combinational circuit that compares two digital or binary numbers consider a and b and determines their relative magnitudes in order to find out whether one number is equal, less than or.