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TL;DR: In this article, the performance analysis of a Symmetric Heterojunction Underlap Double Gate (U-DG) GaN/AlGaN Metal Oxide Semiconductor High Electron Mobility Transistor (MOS-HEMT) on varying the effective capacitance by using different oxide materials on source and drain sides, and determination of optimum length of oxides for the superior device performance has been presented.
Abstract: Comparative analysis of a Symmetric Heterojunction Underlap Double Gate (U-DG) GaN/AlGaN Metal Oxide Semiconductor High Electron Mobility Transistor (MOS-HEMT) on varying the effective capacitance by using different oxide materials on source and drain sides, and determination of optimum length of oxides for the superior device performance has been presented in this work. This paper shows a detailed performance analysis of the Analog Figure of Merits (FoMs) like variation of Drain Current (IDS), Transconductance (gm), Output Resistance (R0), Intrinsic Gain (gmR0), RF FoMs like cut-off frequency (fT), maximum frequency of oscillation (fMAX), gate to source resistance (RGS), gate to drain resistance (RGD), gate to drain capacitance(CGD), gate to source capacitance (CGS) and total gate capacitance (CGG) using Non-Quasi-Static (NQS) approach. Power analysis includes Output power (Pout), Gain in dBm and power output efficiency (POE) have been studied. Studies reveal that the device with higher dielectric material towards source side shows superior performance. On subsequently changing the proportion of two oxides in a layer by varying length, it is observed that as the proportion of oxide increases the device demonstrates more desirable Analog and RF characteristics while best power performance is obtained from device with equal lengths of HfO2 and SiO2.
1 citations
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01 Jan 2021TL;DR: The present study reports that a 68 kDa invertase, appreciably present in Mentha spicata stem, was purified by (NH4)2SO4 precipitation, ion exchange chromatography, size exclusion chromatography and HPLC, suggesting the non-thiol nature of the enzyme.
Abstract: Invertase (β-fructofuranosidase), a commercially important enzyme, for the preparation of invert syrup, has gained importance due to its various biotechnological applications in food and pharmaceutical industry. The present study reports that a 68 kDa invertase (specific activity = 230 ± 25 U/mg protein), appreciably present in Mentha spicata stem (1900 ± 100 U/100 g fresh wt.), was purified by (NH4)2SO4 precipitation, ion exchange chromatography, size exclusion chromatography and HPLC. The enzyme was stable in the pH range of 3.5–7.0 up to 55 °C, with a Km of 7.9 mM sucrose. Hg2+ > PCMB > Ag+ > Pb2+ > Cd2+ inhibited the enzyme activity. Iodoacetic acid, iodoacetamide, DTNB and N-ethylmaleimide did not affect the invertase activity suggesting the non-thiol nature of the enzyme. The enzyme hydrolyzed sucrose, raffinose and inulin (slightly) with no maltose or levan hydrolyzing activities. The enzyme (3U/mL) completely hydrolyzed sucrose (8% w/v) to invert syrup in 5 h at 50 °C. Immobilization of the enzyme on oxidized bagasse (dialdehyde cellulose) increased its temperature optima (by 10 °C) and thermostability (retaining 45 ± 2% and 30 ± 1% activities at 70 and 80 °C, respectively). Immobilized enzyme system efficiently produced invert syrup from sucrose, remaining 80 ± 1% active after 20th cycle.
1 citations
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TL;DR: In this paper, the magnetic non-destructive method was used to study the condition of wire rope core ropes in two cage winders in a coal mine, and the results showed that the results were similar to those of the magnetic nondestructive method used in this paper.
Abstract: The most widely used method to study the condition of winder ropes is the magnetic nondestructive method. Localized and distributed flaws in winder ropes can be detected by this method. This paper is intended to highlight the findings using such a technique in the case of independent wire rope core rope in two cage winders in a coal mine.
1 citations
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07 Mar 2009TL;DR: A heuristic approach for the refinements of corpus based on regular expressions and its possible applications in the field of Opinion Mining is provided.
Abstract: In this paper, we have provided a heuristic approach for the refinements of corpus based on regular expressions and its possible applications in the field of Opinion Mining. The proposed work is based on a corpus of reviews. The crude corpus is the raw html files containing reviews. This html file is refined further for the ease of our work so that we can get only the required part from that page. The ultimate output yields the xml files which will precisely store the important parts of the review pages from that refined html page. And that is going to be fed to the further process of language processing for machine learning process in the field of Opinion Mining.
1 citations
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01 Feb 2020TL;DR: In this article, a comparative study of analog performance is undertaken for symmetric and asymmetric source/drain underlap Double Gate (DG) heterojunction based AlGaN/GaN Metal Oxide High Electron Mobility Transistors (MOS-HEMTs).
Abstract: In this work, a comparative study of analog performance is undertaken for symmetric and asymmetric source/drain underlap Double Gate (DG) heterojunction based AlGaN/GaN Metal Oxide High Electron Mobility Transistors (DG MOS-HEMTs). The analog parameters considered for this analysis are Drain current (I D ), Transconductance (g m ) and Intrinsic Gain (g m R O ). A 31.07% and 7.77% higher ON current is achieved for source underlap device when compared with symmetric and drain underlap devices respectively; and a incremented transconductance peak for source underlap device is also established with peak of 16.35% and 5.58% higher than compared to symmetric and drain underlap devices respectively, however the symmetric underlap device shows an Intrinsic gain peak of 60.44% and 58.38% higher than that of source and drain underlap devices respectively.
1 citations
Authors
Showing all 581 results
Name | H-index | Papers | Citations |
---|---|---|---|
Debnath Bhattacharyya | 39 | 578 | 6867 |
Samiran Mitra | 38 | 198 | 5108 |
Dipankar Chakravorty | 35 | 369 | 5288 |
S. Saha Ray | 34 | 217 | 3888 |
Tai-hoon Kim | 33 | 526 | 4974 |
Anindya Sen | 29 | 109 | 3472 |
Ujjal Debnath | 29 | 335 | 3828 |
Anirban Mukhopadhyay | 29 | 169 | 3200 |
Avijit Ghosh | 28 | 121 | 2639 |
Mrinal K. Ghosh | 26 | 64 | 2243 |
Biswanath Bhunia | 23 | 75 | 1466 |
Jayati Datta | 23 | 55 | 1520 |
Nabarun Bhattacharyya | 23 | 136 | 1960 |
Pinaki Bhattacharya | 19 | 114 | 1193 |
Dwaipayan Sen | 18 | 71 | 1086 |