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Additional sc Electricity
Additional sc Electricity

... Explain the shape of each graph ...
10 W, 24 V / 5 V Off-Line Power Supply
10 W, 24 V / 5 V Off-Line Power Supply

... output power supply intended for industrial control applications. ON Semiconductor’s NCP1027 integrated monolithic controller is implemented in a discontinuous conduction mode (DCM) flyback topology to provide 24 volts for powering motors or relays and an additional 5 volt output is provided utilizi ...
The B B LST Detector High Voltage System: Design and Implementation
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... region ranges between 5 and 6kV, with a typical working point of 5.5kV. At this operating voltage, currents in a single LST tube typically range between 15 and 100nA without beams, and between 50 and 1000nA (depending on the position within the detector) with colliding beams. Since the occupancy and ...
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... High Efficiency 10-LED Boost Converter. The functionality and major parameters of the CAT4238 can be evaluated with the CAT4238AGEVB board. The CAT4238 is a high voltage CMOS constant-current DC/DC converter that has been designed to drive with high efficiency white or other high brightness LEDs. Th ...
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PDF

Lab 2
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... current is infinitely large, a very non-practical result. In the Norton case (current source without a resistor), the open circuit output voltage will be infinitely large. We then have a circuit that will have a voltage breakdown if we don’t provide a load at the output. Practical sources have some ...
Single Clock Generator - Asahi Kasei Microdevices
Single Clock Generator - Asahi Kasei Microdevices

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DN489 - High Efficiency, High Density 3
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... LTC3829 includes two features that reduce the peakto-peak output voltage excursion during a load step: programmable nonlinear control or programmable active voltage positioning (AVP). Figure 4 shows the transient response without these features enabled. Figure 5 shows that nonlinear control improves ...
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Mid-Semester Presentation Senior Design 1 October 8, 2009 RF
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Chapter 17
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... The drift speed is much smaller than the average speed between collisions When a circuit is completed, the electric field travels with a speed close to the speed of light Although the drift speed is on the order of 10-4 m/s the effect of the electric field is felt on the order of 108 m/s ...
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ADF7023 - Analog Devices
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... resistance. It is valid for many circuits and allows us to calculate one quantity if we know the value of the other two. Ohm’s law states that the current through a circuit is directly proportional to the source voltage and inversely proportional to the resistance in the circuit. For a single circui ...
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... The traffic sign uses many small lights all powered by a rechargeable battery. These lights need to be very bright during the day so that they can be seen clearly. They do not need to be as bright at night. Explain how using a light-dependent resistor can make the energy stored in the battery last ...
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... The Model 648 electromagnet power supply is a robust, fault-tolerant 9 kW supply optimized for powering large 7 or 10 in research electromagnets. It is specifically designed for high precision laboratory use requiring extremely low electrical noise. The linear design removes undesirable higher frequ ...
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... domain schematic, the output of inverter Ua1 (Ub1) in figure 2 is replaced by the switch S. The initial conditions for Cvar and the output, y(t), are 0V and 5V. (b) In the equivalent S domain circuit after 0 + time point, the capacitor and voltage source are replaced with their corresponding S domai ...
High Output LED Strip Tape
High Output LED Strip Tape

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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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