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An Ultra-low Power Temperature Independent Subthreshold CMOS
An Ultra-low Power Temperature Independent Subthreshold CMOS

... about 1.25 V and therefore they require a higher supply voltage. But some solutions have been offered in order to generate a sub-1V reference voltage [10]. Resistive subdivision is used in [11], [12] to decrease the reference voltage. Floating gate structure has also been used as another approach to ...
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... In order to validate the flying-capacitor-based-chopper proposal and the control schemes presented earlier, a fiveleveldiode-clamped inverter system is implemented in the laboratory. The overall structure of the experimental setup is shown in Fig. 7. The main power circuits consist of a single-pha ...
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... In passive devices, (ones that don’t have an internal source of energy) electron flow is always from a location with an excess of electrons to a place with a relative shortage of electrons. In other words, current flows from an area of abundance to one of scarcity. ...
Standing Waves - Oregon State EECS
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Networks I for M.E. ECE 09.201 - 2

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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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