Implementation of High Performance Vedic Multiplier Based on Efficient carry select adder

Author(s):  
Anupama k ◽  
◽  
Lisa c
Author(s):  
Ms. Mayuri Ingole

Utilization of power is a major aspect in the design of integrated circuits. Since, adders are mostly employed in these circuits, we should design them effectively. Here, we propose an easy and effective method in decreasing the maximum consumption of power. Carry Select Adder is the one which is dependent on the design of two adders. We present a high performance low-power adder that is implemented. Also, here in Carry Select Adder, Binary Excess Code-1is replaced by Ripple Carry Adder. After analyzing the results, we can come to a conclusion that the architecture which is proposed will have better results in terms of consumption of power compared to conventional techniques. 


Author(s):  
Srilakshmi Kaza, Et. al.

Energy dissipation and reliability are the two important design constraints in the high performance processor design. With the advancements in the IC manufacturing and reduced feature sizes the energy dissipation increases in exponential manner at the lower technology nodes. So, there is a need to design energy-efficient and reliable circuits and systems. The reliability with temperature is also one of the major challenges in today’s smart systems as they are operated in harsh environments. Most of the works till date analyzed the reliability with respect to DC constraints. The basic operation in the high performance Digital Signal Processing (DSP) is the multiplication is used to simplify various operations like convolution, filtering and correlation. In this work, a Vedic multiplier with 4x4 size is implemented with FinFET based energy recovery Modified PFAL (MPFAL) logic at 45 nm technology node. The designed multiplier performance is analyzed and compared with our earlier work in terms of energy dissipation and delay. The results indicate a reduction of 55% in energy dissipation over ECRL based Vedic multiplier. Linear variation of power dissipation with temperature in the order of pW shows that design MPFAL Vedic muliplier is more reliable compared to CMOS multiplier.


Modern communication systems rely on Digital Signal Processing (DSP) more than ever before. Improving the speed of FFT computation using high speed multipliers will help to enhance the performance of DSP systems. In this paper a DIT FFT architecture using high performance Modified Vedic multipliers is proposed. Vedic Multipliers offer a more efficient way to perform multiplication on large numbers occupying less area and consuming low power and delay The adders used in the Vedic multipliers are Brent Kung based and multiplexer based adders. The right utilization of these adders at different word lengths helps to achieve an architecture with minimal area and power. Comparative analysis of modified 24×24 Vedic Multiplier with existing Vedic Multiplier shows the improvement in performance with respect to power and area. Proposed FFT design is compared with existing designs for dynamic power consumption and an improvement of 46.93% compared to Tsai’s FFT Design and 59.37% compared to Coelho’s FFT Design is achieved. The entire architecture is implemented on Virtex 7 FPGA and simulated using Xilinx Vivado 2017.4.


2019 ◽  
Vol 8 (4) ◽  
pp. 11849-11853

FIR (Finite Impulse Response) filters play a significant role in the field of Digital Signal Processing (DSP) to eliminate noise suppression in Electro Cardio Graph (ECG), Imaging devices and the signal stored in analog media. So filter evaluation is accomplished to reduce the noise level. The Filter passes only the desired frequency to pass thereby reducing distortion in the processed signal during measurement. The FIR filter comprises of basic units like adders, multipliers and the delay element for its operations.FIR and IIR are the two types of digital filters chosen based on the range of inputs, complexity and size requirement. Multipliers and adders play a vital role in deterring the performance of FIR filter. In this work, we design and analyze different multiplier and adder for high-performance Fir filter implementation. The Vedic Mathematics is the methods containing 16 Sutras to aid fast mental calculations. In this work, we propose modified Anurupye Vedic multiplier methods with Kogge Stone fast adder for implementation in the direct form FIR filter. This approach provides 1.5% decrease in delay and 10.2% reduced in power, hence increasing speed marginally than previous methods. Along with low power consumption in Very High-Speed Hardware Description Language (VHDL), all the adders and the multiplier topologies are Synthesized using (Xilinx Spartan – 6 FPGA) Trainer Kit and the proposed 8 – Tap FIR filter is executed using this Board


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