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AC circuit
AC circuit

... example, your voice is transmitted over telephone wires by time-varying voltages, which cause a membrane in the speaker at the other end of the line to vibrate, thus recreating your voice. In audio equipment, the information about sound is encoded as numbers on a compact disk, but can only be played ...
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SGA-4300 数据资料DataSheet下载

... The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or ot ...
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XAPP946 - 适用于 Virtex-4 RocketIO MGT 的开关电源

... used, linear regulator presents a considerable thermal management design challenge. One solution to this problem uses a switching regulator. The switching regulator can easily achieve greater than 85% efficiency and often can peak near 95%. The switching regulator frees board designers to use any in ...
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FMS6203 Low-Cost, 3-Channel, Video Filter Driver for SD/PS/HD FM S6203 — Low-
FMS6203 Low-Cost, 3-Channel, Video Filter Driver for SD/PS/HD FM S6203 — Low-

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... and other high-power transient loads. To meet the peak power demands of aircraft electric loads and to absorb regenerated power, an ultracapacitor based energy storage system is examined in which a bidirectional DAB dc– dc converter is used. The DAB converter shown in Fig. 1 consists of two full-bri ...
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... of active and passive element. But a pulse width modulated inverter employing pure sinusoidal modulation cannot supply sufficient voltage to enable a standard motor to operate at rated power and rated speed. Sufficient voltage can be obtained from the inverter by over modulating, but this produces d ...
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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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