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Transformerless Power Supply Design
Transformerless Power Supply Design

Ring core chokes with iron powder core
Ring core chokes with iron powder core

... non-sinusoidal current flow (see also “Sine-wave chokes”). The current harmonics and the impedance of the circuitry cause voltage harmonics. These harmonics not only cause higher losses and shorten the lifetime of equipment, they are also coupled back into the mains power supply. Harmonic distortion ...
MODEL 63200A SERIES Programmable DC Electronic Load KEY FEATURES
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... waveforms. Another distinct feature is the dynamic auto-frequency sweep function, which enables detecting a UUTs worst case output deviation across a wide range of current frequencies. In addition, a 255-set of data storage function has ...
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Specification Status: Released PolyZen GENERAL DESCRIPTION

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... and when cold without its normal load current.  For example, a typical 100-W incandescent light bulb has a hot resistance of 144 Ω, but when the bulb is not lit, an ohmmeter reading of the cold bulb’s filament will read only about 10 Ω. ...
application note bte15a- installation of plfm
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... 6- Remove wh/red wire from term 19 (40V) to xtal oven socket. MODULATED OSCILLATOR SECTION: 1- Remove Blk/wh and Yel/wh from poinrs 6 & 8 of mod osc board. Save these for composite input to PLFM100. 2- Remove AFC adjust capacitor, chassis mounted choke (L4), and feed thru C28 on chassis wall. Route ...
S-90P0112SMA - SII Semiconductor Corporation
S-90P0112SMA - SII Semiconductor Corporation

... The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments ...
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Lab 5 Handout

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... One solution to the problem of voltmeters and ammeters interfering with the circuits being measured is to use galvanometers with greater sensitivity. This allows construction of voltmeters with greater resistance and ammeters with smaller resistance than when less sensitive galvanometers are used. T ...
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AN-4108 A Fairchild Power Switch based on Switched Mode Power

... switching noise off screen. If a constant sync comparator reference is used, the SenseFET can be turned on just after being turned off by the first sync signal. In this case the secondary rectifying diode is turned off while it is still conducting. This causes a high reverse voltage spike between th ...
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The Reverse Bias Requirement for PIN Diodes in High Power

... to be at least equal to the peak RF These higher voltages are oi%en not available or voltage. too expensive to employ in many applications. In the conditionally safe region there is an instantaneous If a reverse excursion of voltage into forward conduction. voltage in this region is selected, circui ...
FPGA board - ECE Users Pages
FPGA board - ECE Users Pages

... convertor. The ItoV converter consists of an integrator structure with a reset switch in parallel to the capacitor. The reset will give us control of the integration. The input current, Id , is integrated on the capacitor, C, thus producing an output voltage Vout that changes linearly with time. The ...
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TVS Diode Array SPA SP725 Datasheet

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... Thus maintaining the highest efficiency at light load currents. In this mode, the output voltage is monitored with the error amplifier. As soon as the output voltage falls below the nominal value, the high side switch is turned on and the inductor current ramps up. When the inductor current reaches ...
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... Transformers are arguably the most universally applied pieces of electrical equipment. As such, they range in size from miniature units weighing ounces to huge units weighing tons. All transformers, however, exhibit the same basic properties. When mutual induction is permitted between two coils or w ...
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A) Resistance, Voltage and Current Measurement using Analog

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... called negative, return, ground and earth, it’s all the same thing. Occasionally it is also very confusingly referred to as common, the term common can also be used to describe the paralleling of circuits, so if you see it be aware it’s an ambiguous term. I dislike the terms ground and earth; frame ...
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Power Minimization Strategy in MOS Transistors Using

... distort the circuit operation at the lowest frequency required. The input signal(s) to the QFG transistor are superimposed onto the value of the DC voltage that has been placed at the gate. So, if an NMOS transistor is used as the QFG MOSFET, then the input signal is superimposed onto VDD and vice v ...
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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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