This document discusses and compares different types of parallel prefix adders. It begins by introducing binary adders and describing the three stages of prefix addition: pre-computation, prefix-computation, and post-computation. It then describes various parallel prefix adders like Brent-Kung, Kogge-Stone, Ladner-Fischer, and Han-Carlson adders. For FPGA implementation, simple adders typically perform better than parallel prefix adders due to fast carry chains. The document proposes modifying the Kogge-Stone adder using fast carry logic to make it more suitable for FPGAs. Simulation results show that for higher bit widths, the modified Kogge-Stone adder provides better delay than a simple ad
Design of 32 bit Parallel Prefix Adders IOSR Journals
In this paper, we propose 32 bit Kogge-Stone, Brent-Kung, Ladner-Fischer parallel prefix adders. In
general N-bit adders like Ripple Carry Adders (slow adders compare to other adders), and Carry Look Ahead
adders (area consuming adders) are used in earlier days. But now the most Industries are using parallel prefix
adders because of their advantages compare to other adders. Parallel prefix adders are faster and area
efficient. Parallel prefix adder is a technique for increasing the speed in DSP processor while performing
addition. We simulate and synthesis different types of 32-bit prefix adders using Xilinx ISE 10.1i tool. By using
these synthesis results, we noted the performance parameters like number of LUTs and delay. We compare these three adders in terms of LUTs (represents area) and delay values.
Design and implementation of Parallel Prefix Adders using FPGAsIOSR Journals
Abstract: Adders are known to have the frequently used in VLSI designs. In digital design we have half adder and full adder, main adders by using these adders we can implement ripple carry adders. RCA use to perform any number of addition. In this RCA is serial adder and it has commutation delay problem. If increase the ha&fa simultaneously delay also increase. That’s why we go for parallel adders(parallel prefix adders). IN the parallel prefix adder are ks adder(kogge-stone),sks adder(sparse kogge-stone),spaning tree and brentkung adder. These adders are designd and implemented on FPGA sparton3E kit. Simulated and synthesis by model sim6.4b, Xilinx ise10.1.
An Improved Optimization Techniques for Parallel Prefix Adder using FPGAIJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Design of 32 bit Parallel Prefix Adders IOSR Journals
In this paper, we propose 32 bit Kogge-Stone, Brent-Kung, Ladner-Fischer parallel prefix adders. In
general N-bit adders like Ripple Carry Adders (slow adders compare to other adders), and Carry Look Ahead
adders (area consuming adders) are used in earlier days. But now the most Industries are using parallel prefix
adders because of their advantages compare to other adders. Parallel prefix adders are faster and area
efficient. Parallel prefix adder is a technique for increasing the speed in DSP processor while performing
addition. We simulate and synthesis different types of 32-bit prefix adders using Xilinx ISE 10.1i tool. By using
these synthesis results, we noted the performance parameters like number of LUTs and delay. We compare these three adders in terms of LUTs (represents area) and delay values.
Design and implementation of Parallel Prefix Adders using FPGAsIOSR Journals
Abstract: Adders are known to have the frequently used in VLSI designs. In digital design we have half adder and full adder, main adders by using these adders we can implement ripple carry adders. RCA use to perform any number of addition. In this RCA is serial adder and it has commutation delay problem. If increase the ha&fa simultaneously delay also increase. That’s why we go for parallel adders(parallel prefix adders). IN the parallel prefix adder are ks adder(kogge-stone),sks adder(sparse kogge-stone),spaning tree and brentkung adder. These adders are designd and implemented on FPGA sparton3E kit. Simulated and synthesis by model sim6.4b, Xilinx ise10.1.
An Improved Optimization Techniques for Parallel Prefix Adder using FPGAIJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Implementation and Comparison of Efficient 16-Bit SQRT CSLA Using Parity Pres...IJERA Editor
In Very Large Scale Integration (VLSI) outlines, Carry Select Adder (CSLA) is one of the quickest adder utilized as a part of numerous data processing processors to perform quick number crunching capacities. In this paper we proposed the design of SQRT CSLA using parity preserving reversible gate (P2RG). Reversible logic is emerging field in today VLSI design. In conventional circuits, the logic gates such as AND gate, OR gate is irreversible in nature and computing with irreversible logic results in energy dissipation. This problem can be circumvented by using reversible logic. In ideal condition, the reversible logic gate produces zero power dissipation. The proposed design is efficient in terms of delay as compare to irreversible SQRT CSLA. The simulation is done using Xilinx.
EFFICIENT ABSOLUTE DIFFERENCE CIRCUIT FOR SAD COMPUTATION ON FPGAVLSICS Design
Video Compression is very essential to meet the technological demands such as low power, less memory and fast transfer rate for different range of devices and for various multimedia applications. Video compression is primarily achieved by Motion Estimation (ME) process in any video encoder which contributes to significant compression gain.Sum of Absolute Difference (SAD) is used as distortion metric in ME process.In this paper, efficient Absolute Difference(AD)circuit is proposed which uses Brent Kung Adder(BKA) and a comparator based on modified 1’s complement principle and conditional sum adder scheme. Results shows that proposed architecture reduces delay by 15% and number of slice LUTs by 42 % as compared to conventional architecture. Simulation and synthesis are done on Xilinx ISE 14.2 using Virtex 7 FPGA.
High speed and low power adder circuits are highly demanded in Embedded and VLSI design.
In this paper, a new approach for high speed and low power adder design, with less number of gate counts,
optimization of Area, Power and Delay is proposed, The proposed work presents the design, simulation and
implementation of various 8-bit adders on Cadence Design Suite 6.1.5 with Virtuoso, Assura and ADE toolset,
the designs are implemented in GPDK 45 nm technology with unvaried Width and Length of PMOS and NMOS
device, In this paper the Design and Modelling of Ripple Carry Adder, Carry Skip Adder, Carry Lookahead
Adder and Kogge Stone Adder is done using different design styles like CMOS, GDI and GDI-PTL logic is
applied and comparative analysis ismade. From the simulation results it is clear that Parallel Prefix Adder (KSA)
provide a better result compared to other adder design, the proposed KSA adder is modelled and designed using
the combination of CMOS-GDI logic to give better performance.
Design of High Speed 128 bit Parallel Prefix AddersIJERA Editor
In this paper, we propose 128-bit Kogge-Stone, Ladner-Fischer, Spanning tree parallel prefix adders and
compared with Ripple carry adder. In general N-bit adders like Ripple Carry Adders (slow adders compare to
other adders), and Carry Look Ahead adders (area consuming adders) are used in earlier days. But now the most
Industries are using parallel prefix adders because of their advantages compare to other adders. Parallel prefix
adders are faster and area efficient. Parallel prefix adder is a technique for increasing the speed in DSP processor
while performing addition. While when we want to design any 128-bit operating systems and processors we can
use these adders in place of regular adders. We simulate and synthesis different types of 128-bit prefix adders
using Xilinx ISE 12.3 tool. By using these synthesis results, we noted the performance parameters like number
of LUTs and delay. We compare these three adders in terms of LUTs (represents area) and delay values.
— Parallel Prefix adders have been one of the most
notable among several designs proposed in the past. The
advantage of utilizing the flexibility in implementing these
structures based upon through put requirements. Due to
continuing integrating intensity and the growing needs of
portable devices, low power and high performance designs are of
prime importance. The classical parallel prefix adder structures
presented in the literature over the years optimize for logic depth,
area, and fan-out and interconnect count of logic circuits. In this
proposed system, Kogge-Stone adder which is one of types of
parallel prefix adder is used. Kogge stone is the fastest adder
because of its minimum fan-out. When parallel prefix adder is
compared with classical adders it is advantageous in every aspect.
The study reveals that Parallel Prefix adder has the least power
delay product when compared with its peer existing adder
structures (Ripple carry adder, Carry save adders etc).
Simulation results are verified using Xilinx 10.1 and
MODELSIM 6.4a softwares.
Designing and Characterization of koggestone, Sparse Kogge stone, Spanning tr...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Design of 32 bit Parallel Prefix AddersIOSR Journals
Abstract: In this paper, we propose 32 bit Kogge-Stone, Brent-Kung, Ladner-Fischer parallel prefix adders. In general N-bit adders like Ripple Carry Adders (slow adders compare to other adders), and Carry Look Ahead adders (area consuming adders) are used in earlier days. But now the most Industries are using parallel prefix adders because of their advantages compare to other adders. Parallel prefix adders are faster and area efficient. Parallel prefix adder is a technique for increasing the speed in DSP processor while performing addition. We simulate and synthesis different types of 32-bit prefix adders using Xilinx ISE 10.1i tool. By using these synthesis results, we noted the performance parameters like number of LUTs and delay. We compare these three adders in terms of LUTs (represents area) and delay values. Keywords− prefix adder, carry operator, Kogge-Stone, Brent-Kung, Ladner-Fischer
Design and Estimation of delay, power and area for Parallel prefix addersIJERA Editor
In Very Large Scale Integration (VLSI) designs, Parallel prefix adders (PPA) have the better delay performance. This paper investigates four types of PPA’s (Kogge Stone Adder (KSA), Spanning Tree Adder (STA), Brent Kung Adder (BKA) and Sparse Kogge Stone Adder (SKA)). Additionally Ripple Carry Adder (RCA), Carry Look ahead Adder (CLA) and Carry Skip Adder (CSA) are also investigated. These adders are implemented in verilog Hardware Description Language (HDL) using Xilinx Integrated Software Environment (ISE) 13.2 Design Suite. These designs are implemented in Xilinx Spartan 6 Field Programmable Gate Arrays (FPGA). Delay and area are measured using XPower analyzer and all these adder’s delay, power and area are investigated and compared finally
Design Of 64-Bit Parallel Prefix VLSI Adder For High Speed Arithmetic CircuitsIJRES Journal
Parallel prefix adder is a kind of process for speeding up the addition of the system of writing and calculating with numbers which use only two digits. Parallel prefix adders are also known as carry-tree adders and they are known to have the best performance in VLSI designs. Due to constraints on logic blog configurations a routing overhead, this performance advantage does not translate directly into FPGA implementations. Identifying the absolutely accurate area-delay tradeoff curve of the parallel prefix is an interesting problem that has received more attention in research because parallel prefix adder on the other hand represents a type of general adder structure that displays publically in flexible area-time tradeoffs for the design of adder. Many different types of parallel prefix adders are made to increase for optimizing area, fan out, speed and performance. For high speed performance tree like structure is must which helps in greater way. There are many different method used for designing parallel prefix adder based on their speed, size and performance. For area optimization we use Brent-Kung method. If our main purpose is to get the least timing then we have to use Kogg-Stone adder method.
Implementation and Comparison of Efficient 16-Bit SQRT CSLA Using Parity Pres...IJERA Editor
In Very Large Scale Integration (VLSI) outlines, Carry Select Adder (CSLA) is one of the quickest adder utilized as a part of numerous data processing processors to perform quick number crunching capacities. In this paper we proposed the design of SQRT CSLA using parity preserving reversible gate (P2RG). Reversible logic is emerging field in today VLSI design. In conventional circuits, the logic gates such as AND gate, OR gate is irreversible in nature and computing with irreversible logic results in energy dissipation. This problem can be circumvented by using reversible logic. In ideal condition, the reversible logic gate produces zero power dissipation. The proposed design is efficient in terms of delay as compare to irreversible SQRT CSLA. The simulation is done using Xilinx.
EFFICIENT ABSOLUTE DIFFERENCE CIRCUIT FOR SAD COMPUTATION ON FPGAVLSICS Design
Video Compression is very essential to meet the technological demands such as low power, less memory and fast transfer rate for different range of devices and for various multimedia applications. Video compression is primarily achieved by Motion Estimation (ME) process in any video encoder which contributes to significant compression gain.Sum of Absolute Difference (SAD) is used as distortion metric in ME process.In this paper, efficient Absolute Difference(AD)circuit is proposed which uses Brent Kung Adder(BKA) and a comparator based on modified 1’s complement principle and conditional sum adder scheme. Results shows that proposed architecture reduces delay by 15% and number of slice LUTs by 42 % as compared to conventional architecture. Simulation and synthesis are done on Xilinx ISE 14.2 using Virtex 7 FPGA.
High speed and low power adder circuits are highly demanded in Embedded and VLSI design.
In this paper, a new approach for high speed and low power adder design, with less number of gate counts,
optimization of Area, Power and Delay is proposed, The proposed work presents the design, simulation and
implementation of various 8-bit adders on Cadence Design Suite 6.1.5 with Virtuoso, Assura and ADE toolset,
the designs are implemented in GPDK 45 nm technology with unvaried Width and Length of PMOS and NMOS
device, In this paper the Design and Modelling of Ripple Carry Adder, Carry Skip Adder, Carry Lookahead
Adder and Kogge Stone Adder is done using different design styles like CMOS, GDI and GDI-PTL logic is
applied and comparative analysis ismade. From the simulation results it is clear that Parallel Prefix Adder (KSA)
provide a better result compared to other adder design, the proposed KSA adder is modelled and designed using
the combination of CMOS-GDI logic to give better performance.
Design of High Speed 128 bit Parallel Prefix AddersIJERA Editor
In this paper, we propose 128-bit Kogge-Stone, Ladner-Fischer, Spanning tree parallel prefix adders and
compared with Ripple carry adder. In general N-bit adders like Ripple Carry Adders (slow adders compare to
other adders), and Carry Look Ahead adders (area consuming adders) are used in earlier days. But now the most
Industries are using parallel prefix adders because of their advantages compare to other adders. Parallel prefix
adders are faster and area efficient. Parallel prefix adder is a technique for increasing the speed in DSP processor
while performing addition. While when we want to design any 128-bit operating systems and processors we can
use these adders in place of regular adders. We simulate and synthesis different types of 128-bit prefix adders
using Xilinx ISE 12.3 tool. By using these synthesis results, we noted the performance parameters like number
of LUTs and delay. We compare these three adders in terms of LUTs (represents area) and delay values.
— Parallel Prefix adders have been one of the most
notable among several designs proposed in the past. The
advantage of utilizing the flexibility in implementing these
structures based upon through put requirements. Due to
continuing integrating intensity and the growing needs of
portable devices, low power and high performance designs are of
prime importance. The classical parallel prefix adder structures
presented in the literature over the years optimize for logic depth,
area, and fan-out and interconnect count of logic circuits. In this
proposed system, Kogge-Stone adder which is one of types of
parallel prefix adder is used. Kogge stone is the fastest adder
because of its minimum fan-out. When parallel prefix adder is
compared with classical adders it is advantageous in every aspect.
The study reveals that Parallel Prefix adder has the least power
delay product when compared with its peer existing adder
structures (Ripple carry adder, Carry save adders etc).
Simulation results are verified using Xilinx 10.1 and
MODELSIM 6.4a softwares.
Designing and Characterization of koggestone, Sparse Kogge stone, Spanning tr...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Design of 32 bit Parallel Prefix AddersIOSR Journals
Abstract: In this paper, we propose 32 bit Kogge-Stone, Brent-Kung, Ladner-Fischer parallel prefix adders. In general N-bit adders like Ripple Carry Adders (slow adders compare to other adders), and Carry Look Ahead adders (area consuming adders) are used in earlier days. But now the most Industries are using parallel prefix adders because of their advantages compare to other adders. Parallel prefix adders are faster and area efficient. Parallel prefix adder is a technique for increasing the speed in DSP processor while performing addition. We simulate and synthesis different types of 32-bit prefix adders using Xilinx ISE 10.1i tool. By using these synthesis results, we noted the performance parameters like number of LUTs and delay. We compare these three adders in terms of LUTs (represents area) and delay values. Keywords− prefix adder, carry operator, Kogge-Stone, Brent-Kung, Ladner-Fischer
Design and Estimation of delay, power and area for Parallel prefix addersIJERA Editor
In Very Large Scale Integration (VLSI) designs, Parallel prefix adders (PPA) have the better delay performance. This paper investigates four types of PPA’s (Kogge Stone Adder (KSA), Spanning Tree Adder (STA), Brent Kung Adder (BKA) and Sparse Kogge Stone Adder (SKA)). Additionally Ripple Carry Adder (RCA), Carry Look ahead Adder (CLA) and Carry Skip Adder (CSA) are also investigated. These adders are implemented in verilog Hardware Description Language (HDL) using Xilinx Integrated Software Environment (ISE) 13.2 Design Suite. These designs are implemented in Xilinx Spartan 6 Field Programmable Gate Arrays (FPGA). Delay and area are measured using XPower analyzer and all these adder’s delay, power and area are investigated and compared finally
Design Of 64-Bit Parallel Prefix VLSI Adder For High Speed Arithmetic CircuitsIJRES Journal
Parallel prefix adder is a kind of process for speeding up the addition of the system of writing and calculating with numbers which use only two digits. Parallel prefix adders are also known as carry-tree adders and they are known to have the best performance in VLSI designs. Due to constraints on logic blog configurations a routing overhead, this performance advantage does not translate directly into FPGA implementations. Identifying the absolutely accurate area-delay tradeoff curve of the parallel prefix is an interesting problem that has received more attention in research because parallel prefix adder on the other hand represents a type of general adder structure that displays publically in flexible area-time tradeoffs for the design of adder. Many different types of parallel prefix adders are made to increase for optimizing area, fan out, speed and performance. For high speed performance tree like structure is must which helps in greater way. There are many different method used for designing parallel prefix adder based on their speed, size and performance. For area optimization we use Brent-Kung method. If our main purpose is to get the least timing then we have to use Kogg-Stone adder method.
Design the High Speed Kogge-Stone Adder by UsingIJERA Editor
In this Technical era the high speed and low area of VLSI chip are very- very essential factors. Day by day number of transistors and other active and passive elements are growing on VLSI chip. In Integral part of the processor adders play an important role. In this paper we are using proposed kogge-stone adders for binary addition to reduce the size and increase the efficiency or processors speed. Proposing kogge stone adder provides less components, less path delay and better speed compare to other existing kogge stone adder and other adders. Here we are comparing the kogge stone adders of different-different word size from other adders. The design and experiment can be done by the aid of Xilinx 14.1i Spartan 3 device family.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
LOGIC OPTIMIZATION USING TECHNOLOGY INDEPENDENT MUX BASED ADDERS IN FPGAVLSICS Design
Adders form an almost obligatory component of every contemporary integrated circuit. The prerequisite of the adder is that it is primarily fast and secondarily efficient in terms of power consumption and chip area. Therefore, careful optimization of the adder is of the greatest importance. This optimization can be attained
in two levels; it can be circuit or logic optimization. In circuit optimization the size of transistors are manipulated, where as in logic optimization the Boolean equations are rearranged (or manipulated) to optimize speed, area and power consumption. This paper focuses the optimization of adder through technology independent mapping. The work presents 20 different logical construction of 1-bit adder cell in CMOS logic and its performance is analyzed in terms of transistor count, delay and power dissipation. These performance issues are analyzed through Tanner EDA with TSMC MOSIS 250nm technology. From this analysis the optimized equation is chosen to construct a full adder circuit in terms of multiplexer. This logic optimized multiplexer based adders are incorporated in selected existing adders like ripple carry
adder, carry look-ahead adder, carry skip adder, carry select adder, carry increment adder and carry save adder and its performance is analyzed in terms of area (slices used) and maximum combinational path delay as a function of size. The target FPGA device chosen for the implementation of these adders was Xilinx ISE 12.1 Spartan3E XC3S500-5FG320. Each adder type was implemented with bit sizes of: 8, 16, 32, 64 bits. This variety of sizes will provide with more insight about the performance of each adder in terms of area and delay as a function of size.
This paper presents different techniques of one bit Full adder. In every technique the main requirements are power consumption, speed and power delay product. The proposed FIN-FET technique gives the bette.r power consumption, speed and power delay product than other techniques. The proposed Fin-FET technique is compared with some of the popular adders based on the power consumption, speed and power delay product. We designed each of these techniques by using Spice simulation soft wares.
EFFICIENT ABSOLUTE DIFFERENCE CIRCUIT FOR SAD COMPUTATION ON FPGAVLSICS Design
Video Compression is very essential to meet the technological demands such as low power, less memory
and fast transfer rate for different range of devices and for various multimedia applications. Video
compression is primarily achieved by Motion Estimation (ME) process in any video encoder which
contributes to significant compression gain.Sum of Absolute Difference (SAD) is used as distortion metric
in ME process.In this paper, efficient Absolute Difference(AD)circuit is proposed which uses Brent Kung
Adder(BKA) and a comparator based on modified 1’s complement principle and conditional sum adder
scheme. Results shows that proposed architecture reduces delay by 15% and number of slice LUTs by 42
% as compared to conventional architecture. Simulation and synthesis are done on Xilinx ISE 14.2 using
Virtex 7 FPGA.
EFFICIENT ABSOLUTE DIFFERENCE CIRCUIT FOR SAD COMPUTATION ON FPGAVLSICS Design
Video Compression is very essential to meet the technological demands such as low power, less memory and fast transfer rate for different range of devices and for various multimedia applications. Video compression is primarily achieved by Motion Estimation (ME) process in any video encoder which contributes to significant compression gain.Sum of Absolute Difference (SAD) is used as distortion metric in ME process.In this paper, efficient Absolute Difference(AD)circuit is proposed which uses Brent Kung Adder(BKA) and a comparator based on modified 1’s complement principle and conditional sum adder scheme. Results shows that proposed architecture reduces delay by 15% and number of slice LUTs by 42% as compared to conventional architecture. Simulation and synthesis are done on Xilinx ISE 14.2 using Virtex 7 FPGA.
Similar to High performance parallel prefix adders with fast carry chain logic (20)
Tech transfer making it as a risk free approach in pharmaceutical and biotech iniaemedu
Tech transfer is a common methodology for transferring new products or an existing
commercial product to R&D or to another manufacturing site. Transferring product knowledge to the
manufacturing floor is crucial and it is an ongoing approach in the pharmaceutical and biotech
industry. Without adopting this process, no company can manufacture its niche products, let alone
market them. Technology transfer is a complicated, process because it is highly cross functional. Due
to its cross functional dependence, these projects face numerous risks and failure. If anidea cannot be
successfully brought out in the form of a product, there is no customer benefit, or satisfaction.
Moreover, high emphasis is in sustaining manufacturing with highest quality each and every time. It
is vital that tech transfer projects need to be executed flawlessly. To accomplish this goal, risk
management is crucial and project team needs to use the risk management approach seamlessly.