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Chapter 32
Chapter 32

... induced emf arise from the circuit itself. The emf L set up in this case is called a self-induced emf. ...
shortwave power amplifier with gu84b
shortwave power amplifier with gu84b

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... ing input lead 117b provides a constant bias to transistor 40 ampli?er 110. In operation, ?rst switches 111 and 112 are closed, and switch 88 opened. This places the opera 115b, thus providing a relatively constant current flow tional ampli?er 110 in the unity gain mode with the through transistor 1 ...
An EMTP – RV Based Analysis of the Line Surge Arrester
An EMTP – RV Based Analysis of the Line Surge Arrester

... due to bipolar flashes that can cause serious problems in electrical power systems. Modelling is of great importance in power system transient analysis. Modelling can be used to describe system, to analyze the behavior of a system under conditions that can occur in nature. The main goal is to achiev ...
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... extremely fast change over to any selected new value. Any fluctuation or deviation of set values is controlled and corrected within microseconds. These features make the system an excellent candidate not only for radiographic and radioscopic applications but also for scanning methods like tomography ...
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... number of these and other electronic devices using more and more power, actions must to be taken to ensure the functionality of the nationwide power grid. In 2001, the European Union put EN61000-3-2 into effect to set the harmonic regulation standard on any power grid supplied application with power ...
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... power rails. The TPS65012 provides two highly efficient, step-down converters targeted at providing the core voltage and peripheral, I/O rails in a processor-based system. Both step-down converters enter a low power mode at light load for maximum efficiency across the widest possible range of load c ...


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... A piezoresistive polysilicon high pressure sensor and thermometer of polysilicon resistor are integrated on the mono-chip of the sensor. The structure, design and fabrication of the high pressure and temperature multifunction sensor are introduced as follows: 2.1. High pressure polysilicon pressure ...
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... diseases is still doubtful. Furthermore, the optimal position of the nebulizer in the system and its type is still unknown. The intermittent synchronized inspiration nebulization is in principle a great improvement for this type of therapy. By using an advanced nebulizer based on vibration mesh, a p ...
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... Almost all modern velocity sensors used for prediction measurements are actually piezoelectric accelerometers which have an integrating circuit built into them to convert acceleration to velocity. These velocity sensors — by the nature of the integration — will always have less frequency range than ...
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Opto-isolator



In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs.A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.
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