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.
In this paper, a new type of fault current limiter (FCL) called impedance-based fault current limiter (IBFCL) is proposed. The structure has the capability to limit the fault current to an extent predefined value by means of the system impedance. The control circuit uses voltage and current data to calculate the impedance value. In order to limit the fault current, several eliminating resistors, which...
Microprocessors and FPGAs need to enable simpler and compact platforms via integration of self-contained test and training circuits, training of data interface buffers for process and temperature variation being a prime example. This paper studies package embedding of resistors for buffer tuning and presents a scheme to utilize a single resistor to train a large number of buffers without increase...
Four factors impact high speed switching of silicon carbide (SiC) devices in voltage source converters, including limited gate driving capability, cross-talk, parasitics associated in switching loop, and parasitics of inductive load. This paper focuses on a solution to mitigate the adverse impact of the aforementioned factors. First, an intelligent gate drive is developed for gate driving capability...
In this paper, a wireless current sharing Scheme for paralleled online uninterruptible power system (UPS) inverters is proposed, based on which effective power sharing under phase locking condition and fast dynamic response of sharing load are obtained. The output impedance of UPS inverter is designed to be resistive, and the droop method based on resistive output impedance is employed. Moreover,...
An analog front-end circuit of analog-to-digital converter (ADC) is one of critical parts, which defines a performance of high-speed signal acquisition boards/systems. It directly influences following characteristics of system: frequency response, noise floor, transient response, over drive recovery. The analog front-end circuit for 500 MSPS 12-bit ADC has been developed, and it features best-in-class...
When circuit parameters are known, it is easy to calculate the modified transient recovery voltage (TRV) with resister breaking or MOSA operating by numerical simulations. But, when the TRV is only known, it is very difficult to calculate the modified TRV by numerical simulations. This paper shows the theoretical analytic method of the modified TRV at such a circuit impedance modification as breaking...
A SPICE simulation methodology to design an isolation impedance network against the residual pulse from IEC 61000-4-2 stress for the system level ESD protection using the TLP data of transient voltage suppressors and IC interface pins is presented. Case studies are used to demonstrate the usage of this methodology.
Transmission Line Pulsing (TLP) is capable of determining a true impedance function in the s-domain, including time-dependent transients, as Z=Z1(1+as+bs2+...), with nonzero s-coefficients. We show how to determine the Z1 and a terms and how to find more terms if desired, for long and short TLP pulses, drawing on network theory and approximation methods. We apply these to examples of inductive delay...
The high output impedance of active clamp buck and boost converters have been tested as a good method to achieve steady state current sharing among several power stages working in parallel. Nevertheless, dynamic current sharing among paralleled or interleaved phases must be ensured. In this work, the current share dynamic performance of this lossless passive equalization method is studied. Simulation...
A thermal model is presented that follows from the heat conduction equation and is exact under the conditions that the mass density, the specific heat and the thermal conductivity in the set-up do not depend on temperature and that the individual thermal contact areas of the models have uniform temperature distribution. The network models allow for the determination of both: the transient temperatures...
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.