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AL4201250256
AL4201250256

CAT3626AEVB CAT3626 6-Channel LED Driver Evaluation Board User's Manual
CAT3626AEVB CAT3626 6-Channel LED Driver Evaluation Board User's Manual

... The CAT3626 input voltage, VIN is supplied on board from a fixed +5 V or +3 V voltage (internally provided) or from an external voltage applied to the VEXT (T5) pad. The voltage supplied at the VIN input of the CAT3626 device can be selected using the jumper options for the K1 connector. When using ...
Electric Current and DC Circuits
Electric Current and DC Circuits

... 23. A 40 Ω electric motor consumes 350 W of power. How much current flows through the motor? 24. How much voltage must be applied across a 450 Ω resistor in order for it to consume 120 W of power? Resistors in Series Classwork 25. A 3 Ω resistor is connected in series to a 6 Ω resistor and a 12-V ba ...
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MAX16936,38 - Maxim Part Number Search
MAX16936,38 - Maxim Part Number Search

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IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

... One of the methods to measure output voltage. When output is at the lower region than the required switch will turn on. Same vice versa when high switch will be turnedoff. iii. Mosfet The metal-oxide-semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET), is by far the most common field ...
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TLVx313 Low-Power, Rail-to-Rail In/Out, 500

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PSPICE Tutorial - Purdue Engineering

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... circuit of the sensor amplifier. Two transistors are used to amplify the signal from the photodiode. The direct-coupled amplifier automatically sets itself to a mid-range operating point, which gets a good signalto-noise ratio from the low-noise BC549C transistors. The transistor input of the amplif ...
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WEEKLY PROGRESS REPORT Student: Rizal Maulana 102521603
WEEKLY PROGRESS REPORT Student: Rizal Maulana 102521603

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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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