Informatics Publishing Limited

Deepak Kumar Patel ¹, Minal Saxena ¹

Affiliations
1 Department of Electronics & Communication, Sagar Institute of Research & Technology, Bhopal, IN

Abstract

High performance digital adder with less power consumption and reduced area is a fundamental design issues for advanced processors. Speed and area are now a days one of the important design issues in digital circuits. One of the fastest adder is Carry Select Adder (CSA) which is used in many processors to perform fast arithmetic function. To increase the efficiency of the adder many different adder architecture designs have been developed. As we know per second millions of operations are performed in microprocessors. So while designing of multipliers, speed of operation is one of most important criteria to be considered. Due to which faster multiplier and high speed architecture of adder plays an vital role in many applications. We, in this paper, proposed a technique for designing of FIR filter using urdhwa multiplier compressor and modified carry select adder. Verification of CSA structure is performed and implemented for 16, 32 and 64 bit filter circuits. Comparing with previous existing structure of adder and our proposed design improves the efficiency of adder. These designs are implemented on Xilinx software.

Keywords

Ripple Carry Adder (RCA), Carry Select Adder (CSA), Binary to Excess-1 Converter (BEC), Compressor, FIR Filter.

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R. Senthoorraja ¹, K. Subaharan ², Deepak Kumar Patel ³, Vppalayam Shanmugam Pragadheesh ⁴, S. Basavarajappa ¹, N. Bakthavatsalam ²

Affiliations
1 Department of Studies in Zoology, University of Mysore, Mysore 570006, IN
2 ICAR-National Bureau of Agricultural Insect Resources, H A Farm Post, Bellary Road, Hebbal, Bengaluru 560024, Karnataka, IN
3 CPMU, Jawaharlal Nehru Centre for Advanced Scientific Research 560064, Bangalore, IN
4 National Centre for Biological Sciences- TIFR, Bengaluru 560065, IN

Abstract

House fly Musca domestica L. is a pest of humans, poultry, and livestock across the world. Dependence on chemical insecticides to contain the flies provided varying results and their continued use has led to development of insecticide resistance. Bioactive compounds in plants are an alternative source to manage M. domestica. Lemon grass, Cymbopogon citratus, Stapf essential oil caused fumigant toxicity to eggs (LC501.299 mg/dm3) and adults (16.56 mg/ dm3). The C. citratus EO caused larval repellence. Polyvinylpyrrolidone when used as polymer matrix to load C. citratus at 1:1, 1:2, and 1:3 caused toxicity to flies for a longerperiod as compared to use of EO alone. The EO loaded in polymer matrix had a slower dissipation, EO+PVP polymer mixed at 1:3 retained over 80% of EO after 72 hr when exposed to 60oC. EO, whilst EO alone without a dispenser dissipated in 3 hr. The biological effect of C. citratus EO on M. domestica canbe enhanced for a longer period if loaded into a polymer matrix and this would be an effective strategyto manage M. domestica.

Keywords

Cymbopogon citratus, essential oil, fumigant toxicity, Musca domestica, polyvinyl pyrrolidone, polymer matrix, slow delivery, repellence activity, ovicidal toxicity, GC-MS

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