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ZnO-based transparent thin-film transistors
ZnO-based transparent thin-film transistors

... fact that a positive gate voltage is required to induce a conducting channel, and that the channel conductivity increases with increasing positive gate bias. Enhancement mode is preferable to depletion mode behavior, in which application of a gate voltage is required to turn the transistor off, sinc ...
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... 2. A critical component is any component of a life support which, (a) are intended for surgical implant into the body, device or system whose failure to perform can be or (b) support or sustain life, or (c) whose failure to perform reasonably expected to cause the failure of the life support when pr ...
BFQ790 for 433 MHz Smart Metering Applications
BFQ790 for 433 MHz Smart Metering Applications

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IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676

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Speed Control of Induction Machines

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... (transimpedance) amplifier for high transfer rate optical transmission, such as LAN (Local Area Networks) and FTTH (Fiber-To-The-Home). The performance of the optical interconnection system depends on the receiver’s gain, bandwidth, power consumption, and noise. These four parameters tend to trade-o ...
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... Measurement Specialties, Inc., a TE Connectivity company. Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information giv ...
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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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