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Partha Sharathi Mallick

Bio: Partha Sharathi Mallick is an academic researcher from VIT University. The author has contributed to research in topics: Bundle & Multiplier (economics). The author has an hindex of 12, co-authored 77 publications receiving 495 citations.


Papers
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Journal ArticleDOI
TL;DR: The proposed multiplier is used in image processing applications, where the peak signal to noise ratio of the image is measured and results show that the proposed multiplier performs better than existing approximate multiplier.
Abstract: This paper presents the design of approximate 15-4 compressor using 5-3 compressors as basic module. Four different types of approximate 5-3 compressors are used in a 15-4 compressor for less power consumption and high pass rate. We have analysed the results in all the cases. A $16 \times 16$ bit multiplier is simulated using the proposed 15-4 compressor. Simulation results show that the multipliers with proposed approximate compressors achieve significant improvement in power as compared to the multipliers with accurate 15-4 compressor. Pass rate of the proposed multipliers are high as compared to other existing approximate multipliers. Finally, the proposed multiplier is used in image processing applications, where the peak signal to noise ratio of the image is measured. Quality of the image is compared with an accurate multiplier and the obtained results show that our proposed multiplier performs better than existing approximate multiplier.

68 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented an accurate modeling hierarchy for mixed CNT bundle interconnects, where single-walled CNTs and multi-wall CNT bundles were modelled as equivalent single conductor transmission lines and then combined to form a mixed-CNT bundle Interconnect, which is basically a multiple-equivalent single conductor model.
Abstract: Presented for the first time is an accurate modelling hierarchy for mixed CNT bundle interconnects. Single-walled CNTs and multi-walled CNTs have been modelled as equivalent single conductor transmission lines and then combined to form a mixed CNT bundle interconnect, which is basically a multiple equivalent single conductor model. Two multiple equivalent single conductor interconnects have been taken to form the multiconductor transmission line model. The delays from transient analysis for both models for a unit bundle have been compared with the corresponding ones for SWCNT bundles and MWCNTs that exist in the literature. It is found that mixed CNT bundle interconnects are superior to both SWCNT bundle and MWCNT interconnects in terms of delay.

32 citations

Journal ArticleDOI
TL;DR: This is the first review on MCB VLSI interconnects and the ability to conduct high current at high temperatures through the 1D structure is making the CNT interconnect technology an attractive one.

31 citations

Journal ArticleDOI
TL;DR: In this article, a realistic inter-carbon nanotube (CNT) electrostatic coupling capacitance and tunnelling conductance model for a mixed CNT bundle is presented.
Abstract: This article presents a realistic inter-carbon nanotube (CNT) electrostatic coupling capacitance and tunnelling conductance model for a mixed CNT bundle. The change of potential across such a bundle necessitates the need to consider the inter-CNT capacitance in the equivalent circuit of CNT interconnects for very large scale integration circuits. The equivalent transmission line circuit model of a unit bundle containing one single-walled CNT (SWCNT) and one multi-walled CNT (MWCNT) has been shown. This new model is then used to calculate the delay induced by the inter-CNT capacitance and tunnelling conductance, which predicts the relative positioning of MW/SWCNTs in mixed CNT bundle.

24 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed a new method to reduce crosstalk of carbon nanotube (CNT)-based VLSI interconnects by proper integration of semiconducting CNTs (s-CNTs) and a new contact geometry.
Abstract: In this letter, we present a new method to reduce crosstalk of carbon nanotube (CNT)-based VLSI interconnects. For this, proper integration of semiconducting CNTs (s-CNTs) and a new contact geometry, where metallic CNTs are in the core and s-CNTs are in the periphery of the CNT bundle, is proposed. The coupling capacitance between adjacent interconnects is modeled and compared with and without s-CNTs in the CNT bundle periphery. SPICE analysis and EM simulations are carried out which show that the coupling capacitance can be reduced by 82.5% and the resulting delay by 8.41%. We suggest that the crosstalk effect between neighboring wires can be reduced by using s-CNTs in the design.

21 citations


Cited by
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Journal ArticleDOI
TL;DR: Novel approximate compressors and an algorithm to exploit them for the design of efficient approximate multiplier circuits are proposed and synthesized approximate multipliers for several operand lengths using a 40-nm library.
Abstract: Approximate computing is an emerging trend in digital design that trades off the requirement of exact computation for improved speed and power performance. This paper proposes novel approximate compressors and an algorithm to exploit them for the design of efficient approximate multipliers. By using the proposed approach, we have synthesized approximate multipliers for several operand lengths using a 40-nm library. Comparison with previously presented approximated multipliers shows that the proposed circuits provide better power or speed for a target precision. Applications to image filtering and to adaptive least mean squares filtering are also presented in the paper.

173 citations

Journal Article
TL;DR: In this article, Boron nitride nanotubes (BNNT)/polyvinyl alcohol (PVA) composite fibers were fabricated via electrospinning so that all BNNTs became aligned in the fiber casting direction.
Abstract: Boron nitride nanotube (BNNT)/polyvinyl alcohol (PVA) composite fibers (<5 vol % BNNTs) were fabricated via electrospinning so that all BNNTs became aligned in the fiber casting direction. A several-fibers-thick ensemble of parallel-arranged contacting fibers made a single polymer sheet. Numerous sheets were then stacked in different ways with respect to the BNNT orientation (all fibers in adjacent sheets were either parallel or alternately rotated 90°) to make multilayer films that were finally hot-pressed. Various BNNT textures were reflected by the corresponding differences in the measured thermal conductivities of the resultant films due to anisotropy of thermal transport in the nanotubes. The highest values (0.54 W/mK) were obtained along the long axes of aligned BNNTs. Somewhat lower values (0.38 W/mK) were documented in films with alternately stacked fibers/tubes. The theoretical thermal conductivity values were estimated using the Nielsen’s model. These show good match with the experimental data. ...

162 citations

Journal ArticleDOI
TL;DR: This study highlights that there is no unique winning approximate compressor topology since the best solution depends on the required precision, on the signedness of the multiplier and on the considered error metric.
Abstract: Approximate multipliers attract a large interest in the scientific literature that proposes several circuits built with approximate 4-2 compressors. Due to the large number of proposed solutions, the designer who wishes to use an approximate 4-2 compressor is faced with the problem of selecting the right topology. In this paper, we present a comprehensive survey and comparison of approximate 4-2 compressors previously proposed in literature. We present also a novel approximate compressor, so that a total of twelve different approximate 4-2 compressors are analyzed. The investigated circuits are employed to design $8\times 8$ and $16\times 16$ multipliers, implemented in 28nm CMOS technology. For each operand size we analyze two multiplier configurations, with different levels of approximations, both signed and unsigned. Our study highlights that there is no unique winning approximate compressor topology since the best solution depends on the required precision, on the signedness of the multiplier and on the considered error metric.

126 citations