This function requires a magnitude comparator, generic synthesis. This 2bit comparator which is designed by the approach of ptl provides good performance by. Introduction in this report it is clearly illustrated how to design a 2bit comparator circuit. Interprets its inputs as signed or unsigned numbers and indicates their arithmetic relationship greater or less than 2 3of 12 example comparator use.
In this post, we will make different types of comparators using digital logic gates. 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. Efficient implementation of 2bit magnitude comparator. Waveform of 2bit magnitude comparator using transmission gate logic style consider input bits 0100 then according to truth table in output side 1.
The 2bit magnitude comparator is designed which provide the three output. 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. A b f ab f ab f a file extension will depe nd upon the hdl language that is being used in your course. A comparator used to compare two binary numbers each of two bits is called a 2bit magnitude comparator. Areapower efficient design of gdi 2bit magnitude comparator in. Designing a 2 bit magnitude comparator duplicate ask question. Comparator designing 1bit, 2bit and 4bit comparators. Solved problem design a 2 bit magnitude comparator a 2 b pdf. Low power design of a two bit mangitude comparator for high speed operation. Design of 2 bit comparator using whenelse statement vhdl. Solved 6 you are to design a new 2 bit comparator the d pdf.
Block diagram of 2 bit comparator download read online. Vhdl 4 bit comperator using 2 bit comperator stack overflow. The output of comparator is usually 3 binary variables indicating. From the above truth table kmap for each output can be drawn as. 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. Keeping the same in mind a new design of 2bit gdi based magnitude comparator has been proposed and. Magnitude comparator in digital logic geeksforgeeks. A digitalmagnitude comparator is a logic circuit that is used to compare the magnitude of two binary numbers say a and b. Designers would normally like to go for lowest level of design. This logic circuit determines whether one 4bit word binary or bcd is less than, equal to or greater than a second 4 bit word. 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. Design of bcd to 7 segment driver for common anode. A digital comparator s purpose is to compare numbers and represent their relationship with each other.
Design of 2 bit comparator using conditional operator verilog code. A 2bit magnitude comparator is typically a combinational logic network that compares two, 2bit binary quantities a ala0 and b b1,b0, where a and b are assumed to be represented as unsigned nonnegative integers. Realization and implementation of 2bit comparator using logic gates on. 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. Ab ab a magnitude comparator design using different logic styles. Design had been successfully tested by proteus simulation software. Area, power and delay efficient 2bit magnitude comparator using. A magnitude digital comparator is a combinational circuit that compares two. Similarly we can have 2 bit comparator and the table to list all the combinations at input and their corresponding outputs is as. The truth table for a 2bit comparator is given below.
Design of 1bit and 2bit magnitude comparators using electrooptic effect in machzehnder interferometers. In digital system, comparison of two numbers is an arithmetic operation that determines if one. The design is done using full adder circuit in mentor graphics eldo net tool. The circuit for a 4bit comparator will get slightly more complex. 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. And compile the circuit and correct all errors if you have any. We will begin by designing a simple 1bit and 2bit comparators.
Pdf design of 1bit and 2bit magnitude comparators using electro. The 180 nm technology, file is used for the design of the magnitude comparator. Im having troubles to create a 4bit comparator using 2bit greater than comparator and 2bit equality comparator. Design of 2 bit comparator using conditional operator. Designing the circuit with optimal constraints of vlsi is the need for every designer. Digital comparator and magnitude comparator tutorial. 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.
What i am trying to get my head around is a 2 bit magnitude comparator circuit that takes in 2 sets of inputs. It consists of four inputs and three outputs to generate less than, equal to and greater than between two binary numbers. This vhdl project presents a simple vhdl code for a comparator which is designed and implemented in verilog before. Here we use microwind to draw the layout of the cmos circuit. 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. Pdf performance analysis of magnitude comparator using. Magnitude comparator is a combinational circuit that compares to numbers and determines their relative magnitude. The design for the comparator based on the truth table and kmap are already presented here. Design of 2 bit comparator using conditional opera. Design of 2 bit comparator using whenelse statement data flow modeling style output waveform.