نتایج جستجو برای: capacitor switching
تعداد نتایج: 81012 فیلتر نتایج به سال:
In this work, we analyze the effects of an inter-stage capacitor located between the power stage input and the driver stage output on the overall efficiency of a RF CMOS power amplifier and on gate-drain reliability problems. To verify the analyzed effects, we designed a RF CMOS power amplifier with a center frequency of 1.85GHz. Class-D amplifiers with a feedback resistor are used as driver st...
A 4.6 W/mm2 Power Density 86% Efficiency On-Chip Switched Capacitor DC-DC Converter in 32nm SOI CMOS
The future trends in microprocessor supply current requirements represent a bottleneck for next generation highperformance microprocessors since the number of supply pins will constitute an increasingly larger fraction of the total number of package pins available. This leaves few pins available for signaling. On-chip power conversion is a means to overcome this limitation by increasing the inp...
We present an introduction to and a tutorial on the properties of the recently discovered ideal circuit element, a memristor. By definition, a memristor M relates the charge q and the magnetic flux φ in a circuit and complements a resistor R, a capacitor C and an inductor L as an ingredient of ideal electrical circuits. The properties of these three elements and their circuits are a part of the...
In this paper a new topology of flying capacitor based multicell converter with reduced switches has been introduced. Compared with conventional multicell converters (Flying Capacitor Multicell and Stacked Multicell converters), the proposed converter doubles the number of output voltage levels and the RMS of output voltage by canceling the midpoint of DC source while the number of high frequen...
Multilevel inputs are capable of generating nearly sinusoidal waveform. The three level inverters use a source with two numbers of capacitors. The operating waveform contains three different levels. The five level inverters use a source with six numbers of capacitors. The operating waveform contains five different levels. The main objective of this paper is to compare the performance of diode c...
Identification of intentional and unintentional islanding situations of dispersed generators (DGs) is one of the most important protection concerns in power systems. Considering safety and reliability problems of distribution networks, an exact diagnosis index is required to discriminate the loss of the main network from the existing parallel operation. Hence, this paper introduces a new island...
A new CMOS PCM channel fiiter is described, which includes transmit and receive filters on a single die. This chip displays an idle-channel noise of typically O dBrnCO, a POWeIsupply rejection ratio of 40-50 dB at 1 kHz, and a fully operational power dissipation of only 35 mW, making it very cost effective in telecommunication switching systems. The design of this chip, including architectural,...
Noise in power supplies is not only caused by the power supply itself, but also the load’s interaction with the power supply (i.e. dynamic loads, switching, etc.). To lower load induced noise, most uninitiated designers use the biggest, lowest impedance capacitor that can be found, thinking that this will absorb the dynamic load current. This method is often hit and miss, and can even cause the...
A systematic approach to the analysis and design of a bi-directional Cûk converter for the cell voltage balancing control of a series-connected lithium-ion battery string is presented in this paper. The proposed individual cell equalizers (ICE) are designed to operate at discontinuous-capacitor-voltage mode (DCVM) to achieve the zero-voltage switching (ZVS) for reducing the switching loss of th...
This study presents a two-switch continuous conduction mode pulse width modulation flyback converter that employs an LC snubber circuit. The snubber circuit is used to achieve zero voltage switching (ZVS) operation for the main switches during the turn-off transition and soft switching for power diodes. With the proposed LC snubber, the magnetic energy in the transformer leakage inductance can ...
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