ABSTRACT The input stage of an operational or transconductance amplifier could be a common-source amplifier and it should be designed carefully, since it contributes in a significant way to the performance of the entire cell. In this document, we show the results of analysing a basic transconduction cell based on the multiple-input ffioating-gate transistor in a common-source amplifier configuration

ABSTRACT In this paper, an improved hysteresis-switching table-based current regulation for the field-oriented control (FOC) drive is designed. The control structure of the proposed scheme is similar to the direct torque control (DTC) scheme; therefore, it is named as the hybrid torque and flux control (HTFC) scheme. Conventional HTFC strategy suffers from high current ripple, due to its inefficiency

ABSTRACT Cascaded multilevel inverters have been increasingly used in industrial applications. However, the quality of the output voltage of these inverters depends highly on the modulation techniques. One of the factors affecting the quality of the inverter output voltage is the existence of common mode voltage. This affects the life of three-phase electric motors connected to the inverter. This paper

Transient coupling between the traces in a double-layer printed circuit board (PCB) is analyzed for excitation with different signal waveforms involved in the digital circuits. Different types of signals such as trapezoidal, step, impulse, and clock are considered for excitation at the source end in a two-layer board having three traces on the top of the substrate. All the traces are matched terminated

ABSTRACT This paper proposes the use of a nature-inspired algorithm known as Grasshopper Optimisation Algorithm for optimising switching angles applied to a three-phase 7-level cascaded H-bridge multilevel inverter. Switching angles obtained using the algorithm can be used to synthesise an optimised output voltage waveform with desired fundamental component and minimised 5th and 7th order harmonics

Abstract In this paper, clocked differential adiabatic logic families, namely, Clocked CMOS Differential Adiabatic Logic (CCDAL) and Clocked Differential Cascode Adiabatic Logic (CDCAL) pertinent to low power applications have been presented. Charge recovery operation of these circuits are realized by the use of complementary two phase sinusoidal power signals. CCDAL uses clocked control transistor

Frequency estimation of multiple real sinusoids is widely concerned in a wide range of areas. In this paper, a DFT-based multiple frequency estimation method for real signal is proposed. It contains a coarse estimation stage and a fine estimation stage. This method, which is performed in the frequency domain, focuses on generating the corresponding analytic signal of each component and reducing the

ABSTRACT The dual input boost converter (DIBC) with voltage multiplier cell (VMC) and operating in continuous conduction mode (CCM) is feasible for applications with high voltage from low voltage renewable energy sources (RES). To achieve a high voltage gain, DIBC is operated with two VMC, and overlapping switch signals, i.e., at duty ratio higher than 0.5; these complicate the modeling and control

ABSTRACT A proposed ultra-high slew rate current recycling folded cascode OTA working in the subthreshold region is presented. By employing adaptive biasing and the proposed positive-feedback nonlinear current mirror techniques, it not only forces the charge or discharge path to enter the strong inversion region during slewing, but also provides an ultra-high output current, leading to a significant

Abstract Tight voltage regulation of the DC Microgrid bus may lead to instability issue which leads to Microgrid system collapse. Constant Power Load (CPL) is a serious problem that exists in cascaded power electronic converters which must have a robust controller to mitigate instability issue. The controller based on mathematical model is vulnerable to model mismatch which could lead to instability

This paper proposes a new Non-Isolated Interleaved (NII) high step-up gain DC-DC converter. This new topology aimed for high power applications, which achieves high step-up voltage gain without a high turns ratio n and a high duty cycle. This converter comprised of two-phase interleaved Coupled-Inductors (CIs) integrated with voltage multiplier rectifier and switched capacitor. The key feature of this

ABSTRACT The transistor-based CMOS technology is facing tremendous physical challenges in nano-scale design. The Quantum-dot cellular automata (QCA) have attracted the research focus as a prospective viable alternative to CMOS technology for future designs in the nano-scale. The cell interaction property helps in information propagation in QCA. The 3-input majority gate, Inverter gate are the basic

A novel topology of the modular multilevel inverter with the ability to boost the input voltage is proposed in this work. The proposed single-source structure requires neither any external controller nor transformers to balance the voltages of the capacitors. In addition, the output voltage polarity of the inverter is generated inherently with a low switching frequency, making it suitable for both

Abstract Single-phase induction motors (SPIMs) are commonly used in domestic and industrial applications because of their robustness, low power rating, and simple input power requirement. Due to their widespread application, the dynamic performance and efficiency at the operating point have become vital to ensure energy conservation. This paper is aimed to optimize both the dynamic performance and

Abstract This study presents an attractive closed-loop system of multiphase switched-capacitor coupled-inductor (MSCCI) converter as well as its relevant analysis and design to fulfill the task of high-gain DC-DC conversion/regulation. The power part of MSCCI is structurally composed of a three-stage switched-capacitor (SC) booster and a turn-ratio-n coupled inductor. Under multiphase operation, the

Abstract In today’s world, wireless communication is considered as one of the most vibrant technological areas as it provides remote monitoring and control without using cabling and wiring setup. This paper describes the multiband behavior of several circular-shaped hybrid fractal antennas. Initially, a circular-shaped fractal antenna (antenna-A) is designed and its performance is scrutinized. Afterwards

With CMOS process developing, the Static Random Access Memory(SRAM) suffers unavoidable degradation in terms of read and write stabilities. To optimize the memory with conventional 6-T cell in 7-nm process technology, Response Surface Method (RSM) is adopted to get the optimized relationship among the noise margin, the operating temperature, the supply voltage, the unit ratio, the pull-up ratio and

Abstract This research article implemented a new technique for a direct ac to ac power conversion in a three-phase quasi Z-source direct matrix converter (QZSDMC). The QZSDMC is designed by connecting a quasi Z-source impedance network in series with a normal direct matrix converter. In this system, three-phase fixed voltage and supply frequency has been received from the source whereas, the variable

ABSTRACT In this article we propose a new CMOS neuron topology with analog signals and digital weights. An arrangement of series transconductors multiply the input voltage by the digital weights resulting in weighted currents. These currents can be added or subtracted from the output node. The output current flows through a resistance generating the output voltage. Since the voltage signals are rail-to-rail

ABSTRACT In this paper, a new transformation polynomial for s-to- z plane is presented. This third-order transformation is derived by optimizing the coefficients of the logarithmic series followed by utilizing the multirate technique to extend its bandwidth. In terms of magnitude and phase response, the proposed transform correlates well with the ideal and shows mean absolute magnitude error and mean

In this paper, a novel resistorless CMOS voltage reference with a sub-one-volt power supply is proposed and simulated in 90 nm CMOS technology. The thermal voltage obtained from ∆VBE is converted into a current (I) proportional to the square of temperature (T2) using a deep triode MOSFET as a resistor. A linear positive temperature coefficient part of the circuit is built by applying this current through

ABSTRACT Software-defined radio (SDR) deals with the opportunistic detection and allocation of the radio frequency (RF) signals in the cognitive radio network (CRN). The opportunistic spectrum use between primary licensed and secondary unlicensed user depends upon the adequate detection of the spectrum hole. This paper presents a design of a smart compact wideband patch antenna for SDR in cognitive

Limited by resources, single centralized ZigBee cannot be deployed in very large-scale application. To solve this problem, thepaper presents a strategy design of ZigBee network that can be centralized and decentralized deploying in a wide area. There are two kinds of networks structure: the mobile independent networkand the multi sink large scale network. The paper analyzes their performance, and then

Abstract The weighting factor adjustment limits the extensive application of conventional model predictive torque control in practice. In this paper, a model predictive torque control strategy with gravitational search algorithm (GSA) is proposed. The detail of an adaptive torque variable is introduced to control the flux linkage of the induction motor, and a modified value function is constructed

Abstract- Full Adder cell is the main building block of larger arithmetic circuits and often is placed along their critical path. Therefore, it is a vital task to design high-performance and low-energy Full Adder cells. In this paper, a novel inexact Full Adder cell is proposed based on carbon nanotube field-effect transistor (CNFET) technology. Comprehensive simulations are carried out at the transistor

Abstract Fault Ride-through (FRT) capability of grid connected Doubly Fed Induction Generator (DFIG) for the wind energy system is an important feature. In this paper, FRT control technique of DFIG against the asymmetrical fault conditions is proposed. In which, the grid voltage unbalance is controlled with the help of sequence decomposition of rotor current, stator voltage and grid side current. The

Abstract Memristor-based combinational logic is one of the unique concepts of designing digital circuits to achieve compact design, faster operation, and lesser power consumption. This work presents a unique memristor-based transistor-less combinational logic circuits design and analyses the performance benchmarking with other state of the art methods. Observed results demonstrated that the proposed

Abstract In this research, an improved PTS algorithm is projected for diminishing peak to average power ratio (PAPR) of well accepted and effective orthogonal frequency division multiplexing (OFDM) system. OFDM is also considered as trustworthy method for several wireless communication applications and obtained a lot of the research interests but unfortunately, one of the most important concern is

Abstract This study presents a modified solid-state fault current limiter (SSFCL) based on AC/DC reactor, which limits both transient and steady-state fault currents under fault condition. It includes two diodes and one Insulated-gate bipolar transistor (IGBT) switch. The number of semiconductor switches in the proposed AC/DC reactor SSFCL is a quarter and half of the semiconductor switches employed

Abstract In this paper, a new approach to enhance the radiation efficiency of microstrip patch antennas by a quarter-wavelength antireflection superstrate is proposed. It is based on dielectric right-handed metamaterial (MM) build with U-shape cells. The moments method in the spectral domain predicts a maximum radiation efficiency of 78% for disk microstrip antenna combined with quarter-wavelength

ABSTRACT High gain dc-dc boost chopper are rapidly expanding substituting power converters for Photo Voltaic (PV) appliances. Investigators are creating different schemes to accomplish greater voltage gain, low ripple, switch stress, decreases the cost of converters. and reduces the fluctuations at the photovoltaic operation point. This paper proposes a two-stage converter for standalone solar photovoltaic

This paper proposes a virtual-flux-based model predictive control (VF-MPC) scheme to remove the grid voltage sensor and enhance the grid current performance for AC/DC matrix converter under unbalanced grid voltages. By modelling the power flow in terms of the virtual flux (VF) and its 90o lagging signal, the grid current reference and grid voltage are obtained simply without the extraction of the VF

Abstract This paper aims to design and fabricate a class-F−1 power amplifier (PA) to act at 2.4 GHz frequency with high power-added efficiency (PAE). For this purpose, a harmonic control network is introduced, which consists of three parts: a harmonic control circuit, a transistor bias circuit, and a suppression circuit. Each part of the harmonic control network is individually designed and finally

A novel operational transconductance amplifier (OTA) having high gain and high bandwidth for high speed analog communication techniques and precision filtering is designed in this paper. The designed OTA uses beta multiplier based current biasing scheme with folded cascode amplifier scheme in order to improve the small signal models and the DC gain of circuit. The OTA design was carried out using TSMC

ABSTRACT Linear response characteristics of sensors are affected by ageing and changes in material properties. However, existing methods for improving these characteristics are disadvantaged by recurrent full-scale errors and insufficient speed. Accordingly, this study aims to reduce temperature sensor non-linearity through implementation of evolutionary optimised non-linear functions via a translinear-based

ABSTRACT In this paper, an intelligent direction finding (DF) architecture based on hybrid neural network is proposed. Firstly, the array outputs of DF system are multiplied by the corresponding ideal array manifold and a high-dimensional preprocessed feature vector is derived. In the next, the preprocessed feature is straightly fed into the auto-encoder. The auto-encoder outputs are then used as the

With the boom of communication systems on independent platforms (such as, airplanes and vessels), co-site interference has become prominent. Currently, extensive research has been conducted on the development of an adaptive co-site interference cancellation system (ACICS); however, the related interference cancellation bandwidth characteristics have not been adequately investigated, thereby critically

A vertical p-type 3D Silicon nanotube field effect transistor (p-type Si-NTFET) is designed and simulated by using the tool Sentaurus Technology computer-aided design (TCAD). To improve the performance with reduced short channel effects, Si-NTFET device is created with inner and outer gate structures. The performance of the proposed device is analysed in terms of outer gate length. The Vertical 3D

Abstract This paper presents a seven levels inverter (MLI) used as 3Φ Modified Shunt Active Line Conditioner (MSALC) providing features of low harmonic distortion (low THD) and low Harmonic Current Ratio Factor (HCRF), reduced switching losses, suppressing harmonic currents, compensation of reactive power, enhancement of power factor, balancing load current under unbalanced non-linear load and distorted

Abstract Non-Orthogonal Multiple Access (NOMA) attains a promising result for the several access problems and fulfills the requirements of fifth-generation (5G) networks using strengthening the service quality, like massive connectivity and energy efficiency. To achieve the power allocation of multiple users with the layered transmission, the NOMA is extended with the Multiple Input Multiple Output

This paper proposes a novel modulation algorithm based on vector decomposition and model predictive control for 5-level active neutral-point-clamped (5L-ANPC) inverter. Firstly, the control of 5-level inverter is transformed into that of 3-level inverter by vector decomposition, which reduces the control complexity. Secondly, based on the framework of 3-level inverter, the optimal zero sequence voltage

In this work, implementation of constant current (CC) and constant voltage (CV) control of the LC/S compensated wireless charging converter (WCC) is presented. The LC/S compensation topology, operating as load independent in CC mode, is used in the proposed WCC. The CC charging control mode of the WCC is achieved at the constant operation frequency providing the maximum power transfer. On the other

In this paper, Direction of arrival estimation (DOA) in coprime array is investigated, and an advanced method for DOA estimation is presented with extended coprime array (ECA). Specifically, we use Discrete Fourier Transform (DFT) to obtain initial DOA estimation with large difference co-arrays generated by ECA, then perform Taylor series approximation and total least squares (TLS) method around the

Abstract A (1×2) filtenna array inspired by an inter-digital based bandpass filter is presented in this paper for simultaneous radiation and filtration. The feed line of the proposed antenna array resonating at 14 GHz with fractional bandwidth of 5.72% is modified in such a way that it acts like an inter-digital based bandpass filter. The equivalent lumped circuit model of proposed structure is analysed

ABSTRACT The performance of a Voltage Controlled Oscillator (VCO) is critical to meet the requirements of various wireless standards. This study highlights the use of a tunable active inductor (TAI) to build a VCO with a UMC 0.18 µm process. The exclusion of the MOS varactor and the use of minimal transistors in the design provide significant improvement in the overall silicon area. The proposed single-ended

Abstract Stability and performance of conventional SRAM cells operating at low voltages are severely affected due to enhanced process variations. This paper proposes a Transmission Gate (TG) based 9T SRAM cell with independent read/write operation and compares its performance with 6T, 8T, and 10T SRAM cells. The enhanced read and write ability of the cell is due to the selective use of positive feedback

Abstract In present study, multi-threshold property was firstly utilized to design a new standard quaternary inverter (SQI), quaternary buffer, binary-to-quaternary converter (B2Q) and quaternary-to-binary converter (Q2B) using CNTFET. Then, quaternary Latch and Flip Flops as well as quaternary counter with different structures were designed for the first time, based on inverter, buffer and binary-to-quaternary

Abstract The wound rotor type Doubly Fed Induction Generator (DFIG) based adjustable velocity wind generator system is the most promising wind turbine system in the wind industry. A fractional-order proportional-integral-derivative (FOPID) based modified Incremental Conductance (INC) maximum power point tracking (MPPT) controller is proposed for DFIG based wind turbine (WT) system. The simulation of

Low-complexity neighbourhood search algorithms for a massive Multiple-Input Multiple-Output (MIMO) wireless system has fascinated recent research attention. It performs iterative searches in a constrained maximum-likelihood (ML) space for the solution vector. However, they drive an inversion of large-dimensional matrices with an enormous amount of computations resulting in them becoming practically

Abstract In a Non-orthogonal multiple access (NOMA) system, most crucial function at the transmitter is power allocation followed by superposition coding and at the receiver end Successive Interference Cancellation (SIC). Overall system throughput and performance of the system depends on user clustering, power allocation scheme and SIC at receiver which is expected to have minimal error. In this paper

ABSTRACT Transparent antennas are becoming important in the wireless field since they can be integrated in combination with solar cells placed underneath the transparent antenna to make the antenna system compact. In this regard, water is used in this study. The behaviour of a water dielectric patch antenna is presented to find the influence of the thickness of water and the type of water used on the

ABSTRACT In this paper, the construction of a miniaturised hexagonal microstrip antenna (MSA) loaded with Defected Ground Structure (DGS) and Metamaterial (MTM) superstrate proposed for 5.2 GHz WLAN application is presented. Initially, the fundamental resonant frequency of the hexagonal MSA was reduced from 14.8 GHz to 5.2 GHz using a rectangle DGS. For the suggested antenna model a miniaturisation

ABSTRACT Multiple antennas are usually employed to improve the performance of the wireless communication system. To this context, we derive the effective capacity (EC) expressions for Inverse Gamma (I-Gamma) shadowed fading channel, employing maximal ratio combining (MRC) and selection combining (SC) diversity schemes at the receiver (Rx) side. The channels are assumed to be independent and identical

This paper proposes a non-isolated bipolar bi-directional DC-DC converter with an interleaved switched capacitor for bipolar DC micro-grids suitable for both low power and high power applications to achieve high voltage gain. Interleaved structure onlow voltage side is proposed to realize current sharing to reduce current ripple and switched capacitor topology on high voltage side to achieve high voltage

ABSTRACT Ternary logic emerges as an alternative to the conventional binary logic in designing high performance, energy-efficient VLSI circuits because it reduces the number of interconnects and chip area. In this paper, we presented low power and high speed 9:2 encoder and 2:9 decoder designs based on ternary logic using carbon nanotube field effect transistors (CNTFETs). These circuits have been

ABSTRACT This paper presents improved multiplexer based ultra-low-power ternary Half Adder (HA), ternary Full Adder (FA), and ternary 1-bit multiplier designs. The proposed circuits consume 61-91% lesser power and can be implemented with 10-40% lesser number of transistors, as compared to the other corresponding circuits available in the literature. The reduction in power and transistor count has been

Abstract In order to solve the problem of low detection rate of frequency hopping(FH) signal under low SNR,a FH signal detection technology based on deep neural network (vgg16 network) is proposed.Firstly, this paper introduces the principle of FH signal. Then, this paper presents the SSD deep neural network detection framework, and uses this framework to detect FH signal and estimate its parameters

Perpendicular Magnetic Anisotropy based Magnetic Tunnel Junction (PMA-MTJ), Spin Transfer Torque Magnetic Random-Access Memory (STT-MRAM) has attracted wide attention among the next generation Non-Volatile Memory (NVM) technologies due to low leakage and high-density characteristics for embedded memory architectures. However, STT-MRAM based memory cells are not energy efficient with CMOS scaling at

ABSTRACT This paper presents the design of a compact arc shape slot antenna and its application in multiple inputs and multiple-output (MIMO) communications. The unit cell antenna has a footprint of 15 × 15 mm2. The antenna with arc shape stub loaded feedline provides broadband impedance matching extending from 3 GHz– 9.5 GHz. The antenna is made dual-polarised using orthogonal feed structure. A four-port

Managing the speed and power trade-off is becoming increasing challenging as the power supply voltage (Vdd) is scaled down in each era. Existing logic circuits that address the trade-off require more power. A new logic circuit made up of one PMOS and two NMOS is evaluated while coupled to a typical power delivery network (PDN). Simulated in a 0.09µm CMOS, the present circuit not only reduces the supply