This paper presents the small-signal modeling of a synchronous Cuk converter using state-space averaging method. In the proposed isolated converter, the conduction and switching losses reduced by replacing the traditional diode with transistor and employing an auxiliary circuit. It causes the conversion efficiency of the photovoltaic system to be increased and better matching of the supplied load. Also this circuit has significant advantage over other topologies since it enables low voltage ripple on both input/output sides of the converter and better dynamic response. The low frequency small-signal model is done using state space averaging technique and two main power-stage transfer functions are derived, which are control-to-output voltage transfer function and input-to-output voltage transfer function. Using the proposed model of the converter we can analyze and simulate the time domain transient behavior of the system accurately and intuitively. Finally, the accuracy and validity of the proposed system model is verified by simulation results. پرونده مقاله

The single electron transistor (SET) is an effectual device to quantize current. It has been highly considered as the most fundamental single-electron device in the research field of nanotechnology. An electron from the single electron transistor (SET) is a pivotal element in the research field of nanotechnology. This type of transistor with very low power consumption and high-performance speed is considered as a nano-scaled switching device that can control the motion of a single electron. The principles of SET and some of its applications are discussed in this paper. In this research paper, we also focus on some basic device characteristics like ‘Coulomb blockade’, single electron tunneling effect & ‘Coulomb staircase’ on which this Single electron transistor [SET] works and the basic comparison of SET characteristics and also its [SET] advantages as well as disadvantages to make a clear picture about the reason behind its popularity in the field of nanoelectronics. پرونده مقاله

In this paper, a novel technique to improve the input dynamic range and bandwidth of the microwave power detectors (PDs) simultaneously is presented, which utilizes the piecewise linear approximation in conjunction with the distributed structure to achieve the goals. RF to DC conversion is proved for the proposed PD core, including only a MOS transistor that is capable to convert a part of its RF input signal to a DC value, proportional to the RF input power. This is an efficient method that requires less number of active devices and therefore saves more power consumption and active chip area, rather than the previous conventional methods. The analysis of circuit based on the transmission line theory is discussed and the transfer function is extracted mathematically for the proposed model. Moreover, a transistor level design is performed using a 0.15um pHEMT GaAs technology for 24GHz applications. The post layout simulation results are presented. پرونده مقاله

In this paper, an intelligent control system using state-space feedback controller designed to track the maximum power radiation direction of the sun for a photovoltaic system in a varying direction environment will be studied. In fact, the study focuses on the ability of using the state space feedback controller to control the power oscillation around the optimal point such that the power dissipation is minimized. Furthermore, the control system based on the instantaneous power tracking and with respect to the nonlinear photovoltaic cell makes feasible to access the maximum possible electric power using tiny changes in the Single Ended Primary Inductor Converter (SEPIC). پرونده مقاله

This paper introduces a novel micro-opto-electro-mechanical-systems accelerometer that leverages a tunable all-dielectric meta-material. The device operates by modulating the wavelength of incident light-wave. The utilized metamaterial takes advantage of highly tunable ultra-sharp Fano resonance peaks to create a high-performance accelerometer, offering enhanced sensitivity and resolution. Simulation results indicate the functional attributes of the proposed sensor: a mechanical sensitivity of 0.13 nm/g, a linear measurement range spanning ±38.4 g, and an overall sensitivity of 1.17 nm/g. These characteristics render the device applicable across a broad spectrum of uses, from consumer electronics to inertial navigation. This paper introduces a novel micro-opto-electro-mechanical-systems accelerometer that leverages a tunable all-dielectric meta-material. The device operates by modulating the wavelength of incident light-wave. The utilized metamaterial takes advantage of highly tunable ultra-sharp Fano resonance peaks to create a high-performance accelerometer, offering enhanced sensitivity and resolution. Simulation results indicate the functional attributes of the proposed sensor: a mechanical sensitivity of 0.13 nm/g, a linear measurement range spanning ±38.4 g, and an overall sensitivity of 1.17 nm/g. These characteristics render the device applicable across a broad spectrum of uses, from consumer electronics to inertial navigation. پرونده مقاله