Comparative Analysis of Different Types of Full Adder Circuits (original) (raw)
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A Review of 1-Bit Full Adder Design Using Different Dynamic CMOS Techniques
2021
The Domino CMOS Logic Circuits are famously utilized in Very Large Scale Integrated (VLSI) structure. To design a VLSI circuit having low power and fast execution or high speed is the most testing task. By and by, one of the main goals is low power VLSI circuits with high speed. Full Adders are mainly used in various circuits which can perform various errands like development, duplication, division etc. In this manner it will diminish the force usage in full adders expects an enormous part of VLSI circuits having low power. In this paper, domino logic is used to manage a stable, particularly improved response for two constraints in full adder circuits i.e. power and delay. We review the Power, Delay and Power Delay Product (PDP) of 22T Domino Full Adder, 27T Domino Full Adder and 28T Static Full Adder. In this we also review these 3 circuit on the basis of different technology nodes or the feature length i.e. 45nm, 90nm and 180nm.
Low Power Full Adder Circuit ImplementedIn Different Logic
International Journal of Innovative Research in Science, Engineering and Technology, 2014
The aim of this paper is to evaluate the performance of One-bit full adder cell. Different Full Adder cell with conventional static CMOS Adder is being compared. Each Cell showed different power consumption and Delay. Power consumption and speed are two important but conflicting design aspects; hence a better way to evaluate circuit performance is power delay product (PDP).The driving capability of a full adder is very important, because, full adders are mostly used in cascade configuration, where the output of one provides the input for other. Here, we have given a brief description of the evolution of full adder circuits in terms of lesser power consumption, higher speed and lesser chip size. Starting from the most conventional 28 transistor full adder we have gradually studied full adders consisting of as less as 14 transistors (14 T), 16 transistors (16T), CMOS Transmission Gate (TG), Complementary Pass-transistor Logic (CPL), Gate Diffusion Input (GDI) and Static Energy Recover...
A COMPARATIVE STUDY OF FULL ADDER USING STATIC CMOS LOGIC STYLE
In this review paper 1-bit CMOS full adder cells are studied using standard static CMOS logic style. The comparison is carried out using several parameters like number of transistors, delay, power dissipation and power delay product PDP).The circuits are designed at transistor level using180nm CMOS technology. Different full adders are studied in this paper like Conventional CMOS (C-CMOS), Complementary pass transistor logic (CPL), Double pass transistor logic (DPL), Transmission gate (TGA), Transmission function (TFA), New 14T, Hybrid CMOS, HPSC, Pseudo nMOS, GDI full adders.
Design of Energy-Efficient Full Adders Using Hybrid-CMOS Logic Style
IJAET Jan-2012 ISSN, 1963
We present new designs for full adder featuring hybrid-CMOS design style. The quest to achieve a gooddrivability, noise-robustness and low energy operations guided our research to explore hybrid-CMOS style design. Hybrid-CMOS design style utilizes various CMOS logic style circuits to build new full adders with desired performance. We also classify hybrid-CMOS full adders into three broad categories based upon their structure. Using this categorization, many full adder designs can be conceived. The new full adder is based on XOR-XOR Hybrid CMOS model that gives XOR and XOR full swing output simultaneously. This circuit's outperforms its counterparts showing 4%-31% improvement in power dissipation and delay. The output stage also provides good driving capability and no buffer connection is needed between cascaded stages. During our experiments, we found out that many of the previously reported adders suffered from the problems of low swing and high noise when operated at low supply voltages. The proposed full adders are energy efficient and outperform several standard full adders without trading of driving capabilities and reliabilities. The new fulladder circuits successfully operate at low voltages with excellent signal integrity and driving capability. The new adders displayed better performance as compared to the standards full adder. The problem we face during the experiment leads us to different zones where efficient circuit can be developed using this new full adder.
DESIGN OF ENERGY-EFFICIENT FULL ADDER USING HYBRID-CMOS LOGIC STYLE Copyright IJAET
We present new designs for full adder featuring hybrid-CMOS design style. The quest to achieve a good-drivability, noise-robustness and low energy operations guided our research to explore hybrid- CMOS style design. Hybrid-CMOS design style utilizes various CMOS logic style circuits to build new full adders with desired performance. We also classify hybrid-CMOS full adders into three broad categories based upon their structure. Using this categorization, many full adder designs can be conceived. The new full adder is based on XOR-XOR Hybrid CMOS model that gives XOR and XOR full swing output simultaneously. This circuit’s outperforms its counterparts showing 4%-31% improvement in power dissipation and delay. The output stage also provides good driving capability and no buffer connection is needed between cascaded stages. During our experiments, we found out that many of the previously reported adders suffered from the problems of low swing and high noise when operated at low supply voltages. The proposed full adders are energy efficient and outperform several standard full adders without trading of driving capabilities and reliabilities. The new full-adder circuits successfully operate at low voltages with excellent signal integrity and driving capability. The new adders displayed better performance as compared to the standards full adder. The problem we face during the experiment leads us to different zones where efficient circuit can be developed using this new full adder.
Energy Efficient Arithmetic Full Adders using various Technology Nodes
International Journal of Advanced Trends in Computer Science and Engineering (IJATCSE), 2020
We observe many CMOS circuits that consume very high power in recent times. In addition to that of the CMOS family, many logic styles were improved to increase the performance of full adder circuit. Designing existing full adder logic styles in both 90nm and 130nm and compared with proposed logic style. To through the power item, introducing energy efficient full adder with 10 transistors in both 90nm and 130nm technology. All the full adders are planned to investigate in terms of power. The results show that all the models proposed are energy efficient. Finally, power consumed by the full adder cell in comparison with the old designs has been achieved. For meeting the demands of fast progressive era of electronics most efficient full adder structure is developed.
Survey on High Speed Low Power Full Adder Circuits
International Journal of Engineering Research & Technology
The performance of an adder has a major effect on the overall performance of a digital system. The adder is the digital circuits which perform addition of the numbers. In many processors and controllers, the adders are used to do the arithmetic and logical operations in the ALU. As the technology is scaled down continuously, several techniques are implemented to reduce power dissipation with high-speed operation. In this paper, the various low power full adder circuits with high-speed operation have been analyzed. The adder is the fundamental building blocks of arithmetic circuits. An arithmetic circuit is the combination of many adders. Therefore a little amount of power savings or reduction in delay times leads tremendous power saving and better performance of the overall circuit. There are several design techniques and methods are available for low powered high-speed full adders. Some of the design techniques are analyzed in this paper.
DESIGN OF LOW-POWER FULL ADDER IN 0.18 µm CMOS TECHNOLOGY
With the increase in device integration level and the growth in complexity of Integrated circuits, small delay and low power dissipation become important parameters as these increases performance and portability. Battery storage is limited, to extend battery life; low power operation is the primary requirement in integrated circuits. Furthermore, high speed and multiple parallel applications need high computing power, placing greater demands on energy storage elements within the system. Large power dissipation in high performance digital systems requires large size heat sinks. These off chip component makes chip bulky and require large space. Secondly, extra heat in integrated circuit degrades the system performance. The full adder (FA) is a very important and basic building block in Arithmetic and Logic unit (ALU) of digital processor. The most widely accepted metrics to measure the quality of a digital circuit or to compare various circuit styles is power delay product. Further, Portability imposes a strict limitation on power dissipation while needs more computational speeds. The reduced power consumption and the improved speed require optimizations at all levels of the design procedure.
Implementation of Full Adder Cell Using High Performance CMOS Technology
This paper proposed design and implementation of full adder cell which is efficient in terms of both speed and energy consumption which becomes even more significant as the world length of the adder increases. We are introducing adders for low power imprecise applications. In this we propose a full adder design having low complexity, higher computing speed, lower energy consumption, and lower operating voltage. We will explain how to realize a general full adder circuit based on transistor using CMOS technology. The performance of the proposed full adder is evaluated by the comparison of the simulation result. In this system, not signals are generated internally that control the selection of the output multiplexers. Instead, the input signal, exhibiting a full voltage swing and no extra delay, is used to drive the multiplexers, reducing the overall propagation delays. The capacitive load for the input has been reduced, as it is connected only to some transistor gates and some drain or source terminals. The design a full adder having low complexity, higher computing speed, lower energy consumption, and lower operating voltage. Full Adder models to make it understandable for designer. We are giving high throughput with less complex system by showing synthesizable and simulated results.
SN Applied Sciences, 2021
Full Adder (FA) circuits are integral components in the design of Arithmetic Logic Units (ALUs) of modern computing systems. Recently, there have been massive research interests in this area due to the growing need for low-power and high-performance computing systems. Researchers have proposed a variety of FA cells with diverse design techniques, each having its pros and cons. As a result, a systematic method for performance comparison of FA cells using a common simulation platform has become necessary. In this work, we present an extensive study of FA cells. We have compared the performance of thirty-three (33) existing 1-bit FA cells. The drive powers of these FA cells have been compared by applying a variety of load conditions. In addition, the 1-bit FA cells have been extended to 32-bit structures to test their scalability and to investigate their performance in wide-word structures. We have determined that twenty-one (21) of the thirty-three (33) FA cells cannot operate in a 32-bit structure, even though some of them exhibit excellent performance as a 1-bit cell. The main finding of this research is that the single-bit performance parameters of FA cells should not be considered as the main basis for performance comparison. Any FA cell should be analyzed in a multi-bit structure to determine its practical effectiveness. Article Highlights • Hybrid full adders offer better performance than single logic full adders • Many existing full adder cells are not scalable • Conventional Mirror CMOS full adder offers better performance than many recent full adders in wide adder structure