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Profile Documents Logout
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full text pdf
full text pdf

... and most promising power electronic converters intended for very and ultra high voltage and power applications, particularly for HVDC systems [1, 2]. The converter converts electrical energy from ac voltage to dc voltage or from dc voltage to ac voltage. Its specific topology, without the need for t ...
Catalogue PDF (3.4 MB)
Catalogue PDF (3.4 MB)

... • The cradle is easier to pull out owing to the foldable structure adopted, thus reducing the time required for unpacking and installation (only available for types C/V with a rated current of 200A, and when a position switch is not installed). • Low-friction resin with excellent sliding performance ...
LT1787/LT1787HV - Precision, High Side Current Sense Amplifiers
LT1787/LT1787HV - Precision, High Side Current Sense Amplifiers

bq500410A Qi Compliant Free-Positioning Wireless Power
bq500410A Qi Compliant Free-Positioning Wireless Power

... information, or to download a copy of the WPC specification, go to http://www.wirelesspowerconsortium.com. 7.1.3 Power Transfer Power transfer depends on coil coupling. Coupling is dependant on the distance between coils, alignment, coil dimensions, coil materials, number of turns, magnetic shieldin ...
Chapter 2 Diode Circuits
Chapter 2 Diode Circuits

... rectifier forms the first stage of a dc power supply as shown in Figure 2.1. As we will see throughout the text, a dc power supply is required to bias all electronic circuits. The dc output voltage vO will usually be in the range of 3 to 24V depending on the particular electronics application. Throu ...
Aalborg Universitet Yang, Yongheng; Ma, Ke; Wang, Huai; Blaabjerg, Frede
Aalborg Universitet Yang, Yongheng; Ma, Ke; Wang, Huai; Blaabjerg, Frede

File - BZ eLAB
File - BZ eLAB

... when the rectifier output voltage drops. This circuit is called a filter, and its job is to reduce the pulses from the rectifier to a much smaller ripple voltage. No filter configuration can be absolutely perfect, but a properly designed filter will provide a dc output voltage with only a small ac r ...
AN1299
AN1299

ZXLD1350 30V 350mA LED DRIVER with AEC
ZXLD1350 30V 350mA LED DRIVER with AEC

... Device operation (Refer to block diagram and Figure 1 - Operating waveforms) Operation can be best understood by assuming that the ADJ pin of the device is unconnected and the voltage on this pin (VADJ) appears directly at the (+) input of the comparator. When input voltage VIN is first applied, the ...
MAX7032 Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL General Description
MAX7032 Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL General Description

... data in the 300MHz to 450MHz frequency range with data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded). This device generates a typical output power of +10dBm into a 50Ω load, and exhibits typical sensitivities of -114dBm for ASK data and -110dBm for FSK data. The MAX7032 features se ...
MAX5099 Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection General Description
MAX5099 Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection General Description

... to lower voltage components. The DC-DC converter operates over a wide 4.5V to 19V operating voltage range. The MAX5099 operates 180° out-of-phase with an adjustable switching frequency to minimize external components while allowing the ability to make trade-offs between the size, efficiency, and cos ...
Exam 2
Exam 2

... and U denote stored energy. Of these quantities, capacitors in parallel must have the same: a. Q only b. Q & U only c. U only d. V & U only e. V only 18. Two capacitors with CA greater than CB and are connected in series with a battery. Which of the following is true? a. There is more charge stored ...
Interleaved Boost Converter With Intrinsic Voltage
Interleaved Boost Converter With Intrinsic Voltage

... switches and reverse-recovery-related losses of boost rectifiers are also significantly reduced because in the voltage-doubler mode the switching voltages are reduced. In addition, the proposed converter features natural self balancing of the currents through the two interleaved channels so that no ...
RF5388 3.3V, DUAL-BAND FRONT-END MODULE Features
RF5388 3.3V, DUAL-BAND FRONT-END MODULE Features

... The RF5388 is a single-chip dual-band integrated front-end module (FEM) for high performance WiFi applications in the 2.5GHz and 5GHz ISM bands. The RF5388 addresses the need for aggressive size reduction for a typical 802.11a/b/g RF front-end design and greatly reduces the number of components outs ...
A6986F - STMicroelectronics
A6986F - STMicroelectronics

... any digital load (µC, FPGA). The RST open collector output can also implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. ...
Optimal Design for Resonant Power Transformer
Optimal Design for Resonant Power Transformer

... transformer. It somewhat differs from the common study of the hard switching transformer, as we all know the conduction loss equal core loss such that its output power performance can meet the optimal required. But we design a resonant transformer of the essentials are considered in detailed discuss ...
REVIEW ARTICLE Josephson voltage standards
REVIEW ARTICLE Josephson voltage standards

... Thus, in the early 1970s, many national standards laboratories adopted a value for the Josephson constant K J ⫽2e/h and began using the ac Josephson effect as the practical standard of voltage.12,13 Owing to small differences in existing national standards, different values of K J were adopted by va ...
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BD00D0AWHFP
BD00D0AWHFP

Load, Switch, and Commutation Considerations
Load, Switch, and Commutation Considerations

... iii. The parallel Zener diode requirement is VZ2 = Vs+VZ1 = 100V+25V = 125V. iv. Zener diode VZ1 in the parallel-load reset circuit: The energy ½LI 2 is transferred from the coil to the Zener diode when the switch is turned off. The power dissipated in the Zener diode at 20kHz is therefore ½LI 2f s ...
Real Time Implementation of PI and PID Controlled Cascaded H
Real Time Implementation of PI and PID Controlled Cascaded H

... (+Vdc,+2Vdc,+3Vdc,+4Vdc), and negative(−Vdc,-2Vdc,3Vdc,-4Vdc) supply dc voltage (assuming that Vdc is the supply voltage). By using the carrier frequency and switching functions, the harmonic components of the output voltage are determined. Therefore, their reduction of harmonics is just restricted ...
Journal of Applied Science and Agriculture
Journal of Applied Science and Agriculture

... Background: DC voltage power supplies are used in various types of electronic devices. To provide stepped-up DC voltages, a boost converter has been widely used, because the boost converter can realize a simple circuit configuration. However, the boost converter is difficult to utilize for high volt ...
BD95861MUV
BD95861MUV

... For example, with VIN = 12 V, VOUT = 3.3 V, L = 2.2H and the switching frequency f = 600 kHz, the calculated ripple current ⊿IL is 1.8A. Then, the inductor saturation current must be larger than the sum of the maximum output current (IOUTMAX) and 1/2 of the inductor ripple current (∆IL / 2). A larg ...
ECE 431 Electric Machines Lab Manual
ECE 431 Electric Machines Lab Manual

... of circuit breakers. Your instructor will assist you by turning on the necessary breakers when you are ready. Please realize that circuit breakers can only protect against extreme problems or mistakes. They cannot protect against electric shock. The rotating parts of the machines on each bench are s ...
Wireless Communications and Networks
Wireless Communications and Networks

... For power to get to an antenna it must be connected to a transmission line. To prevent standing waves from occurring within the line and for maximum power transfer, the resistance of the transmission line must be equal to the resistance of the antenna. The antenna resistance is termed radiation resi ...
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Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
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