20 research outputs found

    Improvements in the Electrical Performance of IC MOSFET Components Using Diamond Layout Style Versus Traditional Rectangular Layout Style Calculated by Conformal Mapping

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    In the first part of this article, we have proposed an innovative approach to improve the drain current model of the MOSFETs implemented with the diamond layout style (DLS), regarding the longitudinal corner effect (LCE). The proposed model is more accurate than a previous model compared to 3-D TechnologyComputer-AidedDesign (3-D TCAD) simulation results. The new model has an innovative analytical description based on a conformal mapping theory. As a conformal mapping, there has been chosen a Schwarz–Christoffel transformation (SC). The maximal deviation values of the aspect ratio calculated by LCE are in the range from −27% to +38%. In counterpart with the new SC analytical description of DLS, the maximal deviation values are in the range from 0% to −5.5%. The second part of this article describes improvements in the electrical performance of the N-MOSFET components by using DLS counterpart to traditional rectangular layout style (RLS). Both layout style DLS, RLS, respectively, have the same process settings, as well as they are keeping the same gate area A, and an aspect ratio width to length W/L to preserve the same input conditions for their analysis. The maximal drain current increasing for the simulated DLS MOS transistor is over 20% for effective aspect ratio (W/L)eff equal to 2.0 and the angle is set to 60 grads. The presented model has a very good analytic description with the error level lower than 3%

    A True Random Number Generator with Time Multiplexed Sources of Randomness

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    A true random number generator (TRNG) with time multiplexed metastability-based sources of randomness, presented in this paper, is capable of generating random bit sequences formed from noise present in the electronic circuit. An incorporated time multiplexer interleaves digitized random signals coming from sources of randomness and increases output data rate. The proposed TRNGwas fabricated in a STMicroelectronics 130 nm bulk CMOS technology on an area of 0.029mm2. The quality of all random bit sequences has been verified by the FIPS and NIST statistical test suites. The fabricated TRNG generates random bit sequences up to the data rate of 20 Mb/s without any corrective mechanisms at power consumption of 72.48 uW. The changing environmental conditions do not influence the quality of random bit sequences

    Seasonal distribution of harp seals (Phoca groenlandica) in the Barents Sea

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    The distributional patterns of Barents Sea harp seals (Phoca groenlandica) throughout the year are presented based on existing literature and recent Norwegian and Russian field observations. The harp seals breed in February-March in the White Sea. Moulting occurs during April to June in the White Sea and southern Barents Sea. Feeding.behaviour is closely related to the configuration and localisation of the drifting sea-ice during summer and autumn (June-October) when the seals follow the receding ice edge, retiring gradually northwards and northeastwards in the Barents Sea. The southward movement of the population in autumn probably takes place in November prior to the advance of the ice edge, and is likely related to food-search. Apparently, most Barents Sea harp seals seems to concentrate at the southern end of their range in winter and spring
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