Current Issue : October - December Volume : 2020 Issue Number : 4 Articles : 5 Articles
In this paper, a single-phase five-level rectifier with coupled inductors is studied. First,\na discrete mathematical model of a single-phase five-level rectifier is created in two-phase.\nA traditional single vector finite control set model predictive control (FCS-MPC) algorithm is\nimproved to overcome the problems of a varying switching frequency, the large amount of time\nneeded for calculation, and the inaccurate setpoint of current loop tracking. Then, the objective\nfunction of the system is established, and a simple objective function is used instead of an iterative\noptimization of the traditional FCS-MPC algorithm. At the same time, to eliminate the delay error\nand to reduce harmonic distortion, deadbeat control technology is introduced. Finally, the simulation\nand experimental results show that the improved model predictive current control algorithm not\nonly retains the fast response of traditional model predictive control, but also has the advantages of\nfixed switching frequency, small calculation time, and small current steady-state error....
The ultimate memristor, which acts as resistive memory and an artificial neural synapse,\nis made from a single atomic layer. In this manuscript, we present experimental evidence of\nthe memristive properties of a nanopatterned ferroelectric graphene field-effect transistor (FET).\nThe graphene FET has, as a channel, a graphene monolayer transferred onto anHfO2-based ferroelectric\nmaterial, the channel being nanopatterned with an array of holes with a diameter of 20 nm....
This work presents, to our knowledge, the first completely passive imaging with\nhuman-body-emitted radiation in the lower THz frequency range using a broadband uncooled\ndetector. The sensor consists of a Si CMOS field-effect transistor with an integrated log-spiral THz\nantenna. This THz sensor was measured to exhibit a rather flat responsivity over the.................
Assuming that the 0.6-micromsilicon-on-insulator (SOI) complementary metalâ??oxideâ??semiconductor\n(CMOS) technology, different Si-based temperature sensors such as metal-oxide-semiconductor\nfield-effect transistor (MOSFET) (n-channel and p-channel), pn-junction diode (with p-body doping\nand without doping), and resistors....................
Direct Interface Circuits (DICs) carry out resistive sensor readings using a\nresistance-to-time-to-digital conversion without the need for analog-to-digital converters. The main\nadvantage of this approach is the simplicity involved in designing a DIC, which only requires some\nadditional resistors and a capacitor in order to perform the conversion. The main drawback is the\ntime needed for this conversion, which is given by the sum of up to three capacitor charge times\nand their associated discharge times. This article presents a modification of the most widely used\nestimation method in a resistive DIC, which is known as the Two-Point Calibration Method (TPCM),\nin which a single additional programmable digital device pin in the DIC and one extra measurement\nin each discharge cycle, made without slowing down the cycle, allow charge times to be reduced\nmore than 20-fold to values around...................
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