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MP6001 - Monolithic Power System
MP6001 - Monolithic Power System

... setting input UVLO ≥ 10V. It is also recommended that the capacitor at VCC pin be no less than 1uF to achieve stable operation. The VCC pin can be powered with a voltage higher than 4.5V from an auxiliary winding to reduce the power dissipated in the internal start-up circuit. The VCC pin is interna ...
Chapter 3 Additional Problems
Chapter 3 Additional Problems

... would be a view looking downward from the top of the C-shaped core. Since the downward directed flux through this created loop is decreasing as the conductor moves to the left, Lenz's law requires that a current would flow out of the page of Fig. X3.6 through the conductor, if it could, to establish ...
PDF
PDF

Morini Riders Club - elctrical system
Morini Riders Club - elctrical system

... The electrical system is divided into two separate parts: the charging circuit and the ignition circuit. ...
module2 - SNGCE DIGITAL LIBRARY
module2 - SNGCE DIGITAL LIBRARY

... comparator exceeds Vut its output switches from +Vsat to –Vsat and reverts to its original state, +Vsat when the input goes below Vlt. The hysteresis voltage is equal to the difference between Vut and Vlt. Therefore ...
The Flyback Converter
The Flyback Converter

... represented using the same symbol as the transformer, a more descriptive name is “twowinding inductor”. This device is sometimes also called a “flyback transformer”. Unlike the ideal transformer, current does not flow simultaneously in both windings of the flyback transformer. Figure 1(d) illustrate ...
Electronics Exercise 2: The 555 Timer and its
Electronics Exercise 2: The 555 Timer and its

... The discharge pin is normally connected to ground (internally). When the trigger pin transitions from Vcc to 33% Vcc the discharge pin is then internally disconnected from ground and the output pin is set high. The capacitor C then starts to charge through resistor R. The threshold pin detects when ...
Higher EE teacher notes (8.4MB Word)
Higher EE teacher notes (8.4MB Word)

... level rises, output voltage increases. ...
Switch mode power supply controller
Switch mode power supply controller

... The TEA2260/61 can be used in two types of architectures: – Master/Slave architecture. In this case, the TEA2260/61 drives the power transistor according to the pulse width modulated signals generated by the secondary located master circuit. A pulse transformer provides the feedback (see Figure 1). ...
LS7538-LS7539
LS7538-LS7539

Chapter-7
Chapter-7

Design Calculation of Voltage Transformer 66kV Line In 230/66
Design Calculation of Voltage Transformer 66kV Line In 230/66

... oltage transformers is a type of instrument transformer. Which is used in conjunction with measuring instruments, protective relays and control circuits. Instrument transformers are designed to transform voltage or current from the high values in the transmission and distribution systems to low valu ...
Let`s analyze a simple series circuit, determining the voltage drops
Let`s analyze a simple series circuit, determining the voltage drops

SCHOOL OF ENGINEERING
SCHOOL OF ENGINEERING

... Sketch the buffer input and output waveforms to illustrate your explanation as well as the current in the resistor R. Ensure that the sketches have clearly labelled axis. Make reference to the role of both the zener diodes which are a matched to have the same zener breakdown voltage. Assume that bef ...
FSDH0265RN, FSDM0265RN
FSDH0265RN, FSDM0265RN

... functions such as over load protection (OLP), over voltage protection (OVP), abnormal over current protection (AOCP), under voltage lock out (UVLO) and thermal shutdown (TSD). Because these protection circuits are fully integrated inside the IC without external components, the reliability is improve ...
25471_energy_conversion_11
25471_energy_conversion_11

... larger internal voltage EA required for lagging loads than for leading loads • Therefore a larger field current required with lagging loads to get same terminal voltage EA=Kφω • Alternatively for a given IF and load current , Vφ is lower for lagging loads & higher for leading loads • In real synchro ...
primary side - Portal UniMAP
primary side - Portal UniMAP

as440 automatic voltage regulator (avr)
as440 automatic voltage regulator (avr)

... Newage Power Factor controller or other external devices with compatible output. The AVR has the facility for droop CT connection, to allow parallel running with other similarly equipped generators. ...
Voltage and current stepdown PWM controller
Voltage and current stepdown PWM controller

... 5. A current foldback function is implemented thanks to a systematic -6mV negative offset on the current amplifier inputs which protects the battery from over charging current under low battery voltage conditiions, or output short circuit conditions. 6. The Gate Drive output stage has been optimized ...
Lab #4 - Instructional Physics Lab
Lab #4 - Instructional Physics Lab

... 3. What is the resonant frequency,wo, for an RLC circuit with a 1000 Ohm resistor; a 68 mH inductor and a 1000 pf capacitor? What is the decay rate for this circuit? Bonus: At what frequency would the undriven circuit oscillate? 4. Consider the circuit described in question three driven by a voltage ...
Breakdown of Gasses - Department of Electrical Engineering
Breakdown of Gasses - Department of Electrical Engineering

... circuit current expression becomes zero and the current I → ∞ . In this case, the current will, in practice, be limited only by the resistance of the power supply and the conducting gas. This condition may thus be defined as the breakdown and can be written as .d ...
NTUST-EE-2013S
NTUST-EE-2013S

MAX1680/MAX1681 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters _______________General Description
MAX1680/MAX1681 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters _______________General Description

Flash ADC Lab
Flash ADC Lab

... A/D CONVERSION WITH FLASH CONVERTERS A Practical Exercise ...
MAX3238E/MAX3248E +3.0V to +5.5V, 10nA, 250kbps RS-232 Transceivers General Description
MAX3238E/MAX3248E +3.0V to +5.5V, 10nA, 250kbps RS-232 Transceivers General Description

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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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