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A SLOTTED LECHER LINE FOR lMPEDANCE - Research
A SLOTTED LECHER LINE FOR lMPEDANCE - Research

self assessment
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... To solve for the current, write KVL ...
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... and then turns off. After it is off for 2.3µs, the MOSFET switches on once more, and remains on until the switch current again reaches its limit. This cycle repeats until the output is in regulation. A benefit of this control scheme is that it is highly efficient over a wide range of input/output ra ...
gain - Bek Varcoe
gain - Bek Varcoe

... respect to ground. Unlike unbalanced audio lines there is no "signal" carried in the shield or ground connection (unless there is a fault.)The main benefit is that any noise that gets induced into the line will be common to both the positive and negative sides and thus canceled when it arrives at it ...
Review power devices in ac circuits.
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Page 1 of 2 Belkin : Small Conceal Surge Protector 5/10/2008 http
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... especially set aside for epoxy curing only. If possible the curing oven should be flushed with dry nitrogen. The gold-tin (80% Au 20% Sn) eutectic die attach has a melting point of approximately 280°C but the absolute temperature being used depends on the leadframe material used and the particular a ...
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... only in very slow applications where the maximum frequency is much less than 50 Hz/60 Hz. ...
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chapter 2 - UniMAP Portal
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... with the voltmeter connected. Therefore, the voltage across the component is less whenever the voltmeter is connected.  The decrease in voltage may be negligible or it may be appreciable, depending on the sensitivity of the voltmeter being used.  This effect is called voltmeter loading. The result ...
(b).
(b).

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Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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