Varying Accuracy Configurable Multipliers Integrated by Utilizing Quality 4:2 Compressors
S Aruna1, M. Dheeraj2, K. Srinivasa Naik3

1Dr. S Aruna, Department of ECE, Andhra University College of Engineering (A), Visakhapatnam (Andhra Pradesh), India.
2M. Dheeraj, Department of ECE, Andhra University College of Engineering (A), Visakhapatnam (Andhra Pradesh), India.
3Dr. K. Srinivasa Naik, Associate Professor, ECE, Vignan’s Institute of Information Technology (A), Visakhapatnam (Andhra Pradesh), India.
Manuscript received on 14 February 2019 | Revised Manuscript received on 05 March 2019 | Manuscript Published on 08 June 2019 | PP: 335-344 | Volume-7 Issue-5S4, February 2019 | Retrieval Number: E10710275S419/19©BEIESP
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Abstract: In this paper, few 4:2 compressors which are having the flexibility to switch between two operating modes namely exact and approximate based on the requirement of the application, along with an exact compressor that has greater characteristics that the conventional compressor are put-forward. The approx. approach enables these twin-quality compressors to deliver high-speeds with low power consumption at the cost of reduced accuracy which enables them to be used in various solicitations of their importance. Each of these compressors has their own levels of accuracy with different delay, power dissipation and areal consumption values in the approximate mode as well as in the exact mode too. Usage of these configured compressors in the structure of the multipliers helps in further optimizing the properties of designing of multipliers. The efficiencies of these 4:2 compressors are evaluated in 8-bit Dadda multiplier in the 45nm standard CMOS technology by relating their parameters with those of the up-to-the-minute approximate Multipliers. Using a calling circuitry 16 & 32 (bit) dadda multipliers are also evaluated incorporating them with the proposed compressors. This comparative evaluation results indicate reduced delay and lowered power consumption at the cost of reduced accuracy in the inexact mode of the twin eminence compressors, whereas the EXACT compressor that has been designed showcases lowered power, improved speed and reduced area on silicon with precise accuracy in the results. Also, the effectiveness of the EXACT compressor is used to optimize a MAC unit which is used vastly for many solicitations.
Keywords: Approximate Operating Mode-Computing, 4:2Compressor, Accuracy, Configuring, Delay(Lag), Power.
Scope of the Article: Nanometer-Scale Integrated Circuits