The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Above-IC graphene NEMS (gNEMS) switch electrostatic discharge (ESD) protection structures are designed to replace traditional in-Si PN-based ESD structures. Built in CMOS back-end without PN junctions, gNEMS eliminates ESD-induced parasitics (leakage, capacitance, noise) inherent to PN junctions. Transient characterization of gNEMS ESD structures were conducted by transmission line pulsing (TLP) measurement...
Wireless power transmission (WPT) via inductive coupling is used in many applications such as biomedical implants, sensors, and radio-frequency identification (RFID). Range extension, robustness against load (RL) variations and coil misalignments and rotations, and miniaturization of inductive links are key in such applications, demanding new architectures for the integrated power management (IPM)...
Switching power converters with fast load transients are crucial for application processors (APs) to facilitate system-level power adaptability with high current slew rate. While current-mode hysteretic control has been popularly employed in switching converters for simple structure, robust operation and fast transient response [1], it still does not suffice for the unprecedented 1A/ns current slew...
A physically based SPICE compact model for unipolar resistive memories is presented. The model includes ohmic and quantum conduction accounting for filamentary resistive switching operation. In addition, a detailed description of thermal effects is incorporated. Different types of conductive filaments (CFs) can be taken into consideration; in particular, tree-branch shaped filaments. The implementation...
For high spectrum usage, some independent wireless communication systems should share multi-channel environment. An offloading effect over multi-channel makes system throughput enhanced. A multi-channel access based on channel activities of other systems, which are channel occupancy ratio (COR), is important. The estimation of COR needs a traceability to the transition of COR. In software define radio,...
Power Management devices are becoming ubiquitous in every electronic system for achieving energy efficiency with constrained power/thermal budget. Multi-Function and Multi-Channel PMICs are becoming common design trend to support diverse voltage/power requirements of complex SoCs. In this paper, we present an approach to perform a full chip level thermal analysis with the capability to perform a detailed...
We propose a new switching ℒ2 gain for analyzing the magnitude of a switch between two linear time-invariant systems. It focuses on the difference between the actuality that a switch occurs and the virtual situation where it does not occur. Furthermore, we present ℒ2 gain conditions that enable us to compute the value of the proposed switching ℒ2 gain. From the multiple aspects by using the multiple...
The commercial availability of silicon carbide (SiC) MOSFET has been a significant boost for power electronics industry. It is due to its unique improved switching capabilities compared to state of the art silicon (Si) IGBT. However, the faster switching response of SiC MOSFET gives rise to different technical issues in practical applications. This paper analyzes two of these issues. The first problem...
In a three-level flying capacitor inverter, certain switching state sequences can cause an undesirable transient in the pole voltage. The transients constitute and error voltage which degrades harmonic performance, distorts the current and generates electromagnetic noise. This paper presents a scheme to completely eliminate these dead-time transients using a digital state machine to determine the...
This paper introduces a simplified method for estimating switching energy losses in an IGBT device of a Voltage Source Converter (VSC) using Electro-Magnetic Transient (EMT) simulations. By considering the switching process as characterized by an equivalent circuit model of a unit cell that represents one leg of a VSC, equations are derived to evaluate the switching losses at different load currents...
Modular multi-level converters (M2LCs) are typically controlled by using a hierarchical control scheme, where at least two loops are employed to control the load currents and circulating currents. This paper presents a new model predictive controller to control an M2LC with a single controller, which controls the load currents within tight bounds and minimizes capacitor voltage variations and circulating...
Capacitor switching is one of the most important sources of generating transient overvoltage and inrush current of electrical power system. Energizing transient may reduce the life span of capacitor banks, damage of power system equipment and insulation failure. This paper, presents three technologies used to mitigate transients caused by capacitor switching. ATP program is used to simulate capacitor...
A comparator-based current mode control buck-boost DC-DC converter with low transition noise full-wave current sensor is reported in this work. The proposed comparator-based current mode control method with on-time modulation eliminates the controller delay in constant on/off time period during load transient, which is adopted in a buck-boost DC-DC converter to achieve faster load transient responses...
Power quality (PQ) problem is the deviation of voltage and current from their standard waveforms. Penetration of renewable energy (RE) sources such as wind and solar photovoltaic (PV) system into the utility network affects the quality of power supplied. This paper presents the detection of power quality disturbances in the distribution network with various scenarios in the presence of solar PV system...
In this paper, a new structure based on linear-assisted DC-DC buck converter principle is proposed. Using a segmented LDO regulator instead of the conventional linear one in the hybrid scheme, reduces the difference between input and output voltages and also the switching frequency of the buck converter, while the circuit provides a lower output ripple, better transient response. In addition, the...
This paper presents a calibration scheme for reference error caused by signal dependent switching transient in a high speed SAR ADC. The scheme has a little hardware overhead, which is not dependent on the type of the input signal and is able to run in the background without interrupting the ADC's normal operation. The calibration along with the SAR ADC are implemented in a 65 nm CMOS and the measurement...
The feedback control system with actuator, which has different slew rates during the rise and fall of output parameter, has been analyzed. The controller for control of such a nonlinear control system is proposed. It takes into account the peculiarity of the system, which is introduced by the actuator, and allows us to achieve good control quality. The controller is developed for the control systems...
This paper presents the conducted electromagnetic interference (EMI) analysis of switch-on transient processes in dynamic wireless charging system used for electric vehicle (EV). Firstly, an equivalent model of dynamic wireless EV charging system with two ground side tracks is established. Also, transfer functions between equivalent EMI sources and conducted EMI in system currents are calculated....
An externally triggered analog sampling circuit used as an alternative to a high speed analog-to-digital converter (ADC) in microcontroller systems is designed, fabricated and characterized. High speed ADCs are expensive in terms of cost and power dissipation, the fast transient digitizer (FTD) is a low cost alternative and has no appreciable DC power dissipation. The transient digitizer uses cells...
This paper explains the design and implementation of a low cost Non-Intrusive Load Monitoring (NILM) system. The system is designed using open source hardware and off-the-shelf components for a cost of below 8 USD. The device identification system makes use of the current-peak signature to uniquely identify devices turned ON at any instance in time. A current sensor is used at the utility service...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.