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Combined Power Oscillator using GaN HEMT
Combined Power Oscillator using GaN HEMT

... low output capacitance to get the high output power and highefficiency characteristics at high-frequency[3]. The solid-state oscillators with several tens of watt have reported using a single device[2,4], then a simplified circuit can be designed instead of using drive amplifiers which are essential ...
Solution for CCVT live calibration for ERCOT 12-12
Solution for CCVT live calibration for ERCOT 12-12

... National Research Council Canada and Quanta Technology ...
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... machines with good isolation, and sometimes loads with inductances in excess of the required value. In other words, neither voltage nor current are as expected. This also means harmonic contamination, additional power losses, and high frequency noise that can affect the controllers. All these reason ...


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Modelling LED Lamps with Thermal Phenomena Taken into Account
Modelling LED Lamps with Thermal Phenomena Taken into Account

... experimentally for two types of lamps and the good agreement between the results of calculations and measurements was obtained. ...
Power Quality Enhancement by Using Multilevel Shunt Active Power
Power Quality Enhancement by Using Multilevel Shunt Active Power

Amplifier Construction
Amplifier Construction

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The surge impedance loading or SIL of a transmission line is

A 5mA 0.6µm CMOS Miller-Compensated LDO Regulator with
A 5mA 0.6µm CMOS Miller-Compensated LDO Regulator with

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... Inadvertent or unexpected loss of power can cause a number of system level problems. Memory loss, uncontrolled program status and indeterminate processor state are just a few of the issues which can occur during catastrophic power failure. Power-fail recovery is critical for applications created to ...
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... capability of the proposed scheme, the system has been simulated with severe voltage sags, making the control work at the maximum output voltage and dealing with the triggering of the crowbar protection. The data of the simulated system may be seen in Table I. In order to compare the presented contr ...
Homework 6
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... Now that we have a reference we can focus on the core of the voltage regulator itself. Using this reference circuit, an op-amp, and resistors, design a circuit that is powered by the super-capacitor voltage Vsc (which for now you can assume is always high enough for the circuit to work) and that wou ...
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... operation cost is successfully reduced up to 3.4% using the parameter given in this paper. At the same time, the bus voltage is maintained in the acceptable level, as is shown in Fig. 4 (d). As is can be seen from Fig. 4 (b) and (c), the power is shared among differently according to the different v ...
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linear-manual - Henley Designs Ltd.
linear-manual - Henley Designs Ltd.

... Impedances of dynamic headphones can vary from 30 Ohms to 600 Ohms. Transferred to loudspeakers this would result in impedances from 4 Ohms to 80 Ohms. The same signal amplitude results in a power consumption difference of factor 20! Loudspeakers and headphones are manufactured in a dazzling variety ...
Converter Power Density Increase using Low Inductive Integrated DC-link Capacitor/Bus
Converter Power Density Increase using Low Inductive Integrated DC-link Capacitor/Bus

... Fig. 6 shows the data that is measured and calculated in the DSP, namely the output three phase currents, the model based calculated on-state voltage drops for 25 C and 150 C as ...
Simulation and Measurement of an On-Die Power
Simulation and Measurement of an On-Die Power

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Decibel

The decibel (dB) is a logarithmic unit that expresses the ratio of two values of a physical quantity, often power or intensity. One of these quantities is often a reference value and in this case the decibel expresses the absolute level of the physical quantity. The number of decibels is ten times the logarithm to base 10 of the ratio of two power quantities, or of the ratio of the squares of two field amplitude quantities. One decibel is one tenth of one bel, named in honor of Alexander Graham Bell; however, the bel is seldom used.The definition of the decibel is based on the measurement of power in telephony of the early 20th century in the Bell System in the United States. Today, the unit is used for a wide variety of measurements in science and engineering, most prominently in acoustics, electronics, and control theory. In electronics, the gains of amplifiers, attenuation of signals, and signal-to-noise ratios are often expressed in decibels. The decibel confers a number of advantages, such as the ability to conveniently represent very large or small numbers, and the ability to carry out multiplication of ratios by simple addition and subtraction. By contrast, use of the decibel complicates operations of addition and subtraction.A change in power by a factor of 10 is a 10 dB change. At the half power point an audio circuit or an antenna exhibits an attenuation of 3dB. A change in voltage by a factor of 10 results in a change in power by a factor of 100, which is a 20 dB change. A change in voltage ratio by a factor of two approximately corresponds to a 6 dB change.The decibel symbol is often qualified with a suffix that indicates the reference quantity that has been used or some other property of the quantity being measured. For example, dBm indicates a reference power of one milliwatt, while dBu is referenced to approximately 0.775 volts RMS.In the International System of Quantities, the decibel is defined as a unit of measurement for quantities of type level or level difference, which are defined as the logarithm of the ratio of power- or field-type quantities.
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