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Subgap biasing of Superconducting Tunnel Junctions without a Magnetic Field
Subgap biasing of Superconducting Tunnel Junctions without a Magnetic Field

... decreased, the system follows a different path than it did when the current was increased, as shown in Fig. 5共a兲. Kirchhoff’s voltage law continues to require that VB = VA + VC. Figure 5共b兲 shows the predictions of the full model, again showing good qualitative agreement. In the experiments, the app ...
CPG.0 Single busbar gas-insulated cubicles Up to 36 kV
CPG.0 Single busbar gas-insulated cubicles Up to 36 kV

LM3914 data sheet
LM3914 data sheet

... a very efficient display driver. Typical standby supply current (all LEDs OFF) is 1.6mA (2.5mA max). However, any reference loading adds 4 times that current drain to the V+ (pin 3) supply input. For example, an LM3914 with a 1mA reference pin load (1.3k), would supply almost 10mA to every LED while ...
RESET MAX1947 Low Input/Output Voltage Step-Up DC-DC Converter with
RESET MAX1947 Low Input/Output Voltage Step-Up DC-DC Converter with

... An inductor value of 4.7µH performs well in most applications. The MAX1947 also works with inductors in the 2.2µH to 6.8µH range. Smaller inductance values typi- ...
Design Consideration for Boundary Conduction Mode Power Factor
Design Consideration for Boundary Conduction Mode Power Factor

... ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other in ...
Altech/ABL Sursum Miniature Circuit Breakers
Altech/ABL Sursum Miniature Circuit Breakers

... allows electrical remote tripping of a breaker. It is trip-free and the housing and terminal specifications are the same as for V-EA miniature circuit breakers. ...
Advanced Applications of Current Conveyors: A Tutorial
Advanced Applications of Current Conveyors: A Tutorial

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The LEDset (Gen2)

... LED technology is changing the world of general lighting. In luminaire design, however, the various benefits of LEDs, e.g. their high level of flexibility in operating luminaires, can only be achieved with perfectly matched power supplies. This is further complicated by the rapid improvement of the ef ...
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Half bridge converter DC balance with current signal

G - Iowa State University
G - Iowa State University

... is one for which we are all quite familiar. Although much heating is done with natural gas as the primary fuel, some heating is done electrically, and even gas heating systems always contain some electric components as well, e.g., the fans. Other thermostatic loads include space heaters/coolers, wat ...
Voltright - Sollatek
Voltright - Sollatek

... controlled by installing a Sollatek SVS on the power lines which supply the cold room equipment. When to use a Sollatek voltage Stabiliser (SVS) The Sollatek Voltage Stabiliser (SVS) is strongly recommended in the following situations where, for example: • A new vaccine cold room is being installed ...
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Stacked_Switches_MJB_V1

... switch. Probably due to turning off high current following a BD [trigger to switch-on is increased in duration for 3 µs from the instant of a BD – but a turn-off command can have been sent ≤200 ns before the BD …..].  Limitations – no active pull down at present (23 µs fall time-constant  250 ns t ...
GVR Brochure- Feb 05.indd
GVR Brochure- Feb 05.indd

... no health hazard from toxic by-products of arcing. Electrical life is well in excess of ANSI requirements. The patented, single coil magnetic actuator provides consistent performance and a dramatic reduction in the number of moving parts. Materials and finishes have been carefully chosen for reliabi ...
Aalborg Universitet Multilevel Converters
Aalborg Universitet Multilevel Converters

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... • Two MIN Terms can be combined if the same output is obtained but the input variable values differ in only 1 bit position. • The variable for which the value differs with no effect on output is eliminated from the resulting expression. ...
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... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Expo ...
A Review of Three Level Voltage Source Inverter Based Shunt
A Review of Three Level Voltage Source Inverter Based Shunt

... Literature review consists of shunt active power filter related research papers that includes different power topologies, control schemes, mathematical modelling, simulation and experiments results. Jose Rodriguez et al. [1] described about the most important topologies like diode-clamped inverter ( ...
Wall Presentation
Wall Presentation

... a DC/DC power supply that would work within the transfer stations to support repeaters and base stations for their wireless voice and data network. Wall provided a highly reliable custom power supply that could survive a rugged environment with no forced air and intense temperature fluctuations. Our ...
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE)
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE)

... the other which are magnetically coupled together with or without change of voltage and without any change in power and frequency. The basic use of transformer is to increase or decrease ac. voltage. If it is used to increase the voltage, it is called a step-up transformer, if it is used to decrease ...
MAX1534 High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers General Description
MAX1534 High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers General Description

... The MAX1534’s buck converter uses a proprietary current-limited control scheme with operation to 100% duty cycle. This DC-to-DC converter pulses as needed to maintain regulation, resulting in a variable switching frequency that increases with the load. This eliminates the high supply currents associ ...
Bias Current Effect on Gain of a CMOS OTA
Bias Current Effect on Gain of a CMOS OTA

... amplifiers requires efficient circuit design techniques [2]. A folded cascode configuration has been widely used in CMOS circuits. The reason is that the output capacitance plays the same role as the compensation capacitance [3]. This configuration also increases transconductance (g0) which in turns ...
experiment - UniMAP Portal
experiment - UniMAP Portal

... Figure 3.6 Voltage versus Current Characteristics of a Separately-Excited DC Generator (Fixed Speed) The separately-excited dc generator provides flexible use because its characteristics can be changed by changing the field current. However, a separate dc power source is needed to excite the field e ...
Low Inductance DC
Low Inductance DC

Chapter 25: Semiconductors Please remember to photocopy 4
Chapter 25: Semiconductors Please remember to photocopy 4

... Do you have any idea how hard it is to solder wires to germanium? I'll tell you: real goddamn hard. The solder simply won't stick, and you can forget about getting any of the grad students in the solid state labs to help you out. Once the wires were in place, I attached them as appropriate to the se ...


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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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