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Accurately measuring nanoamperes Using the Fluke 8808A
Accurately measuring nanoamperes Using the Fluke 8808A

SGA6486Z 数据资料DataSheet下载
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... 100 mV/1A (+/−20 A), adjustable bandwidth up to 80 kHz and low noise analog signal (maximum 92 mVpp for bandwidth of 80 kHz). 3.1.4. LV 25–400 Voltage Sensor The mains supply voltage is measured through a LV 25–400 voltage transducer manufactured by LEM (Geneva, Switzerland). Likewise, it follows th ...
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... The width ∆x of the delta function is zero, and the width ∆k of its Fourier transform is infinite, since the constant function goes on forever. In some fashion, the product of zero times infinity, in this case, is something of order one. ...
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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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