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Chapter 9 Capacitors
Chapter 9 Capacitors

... • When the supply is removed from the capacitor, the capacitor retains the stored charge • The amount of charge that a capacitor can store per volt across the plates is its capacitance (C) • The unit of capacitance is the farad (F). One farad is the amount of capacitance when one coulomb of charge i ...
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... We continue our journey into electric circuits by learning about another circuit component, the capacitor. Like the name implies, “capacitors” have the physical capability of storing electrical charge. Many things can be accidental capacitors. Most electrical components have some amount of capacitan ...
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... Several audio DACs used today require an external low-pass filter to remove out-of-band noise. This is possible with the DRV603, as it can be used like a standard OPAMP. Several filter topologies can be implemented, both single-ended and differential. In Figure 13 , a multi-feedback (MFB) with diffe ...
Electronic Energy Meter
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... Modern solid-state electronic energy meters (also knows as kilowatt-hour meters, etc.) employ recently developed electronic components to measure electrical energy. Basic electronic meters are not just more cost-effective than mechanical meters, but offer further benefits: measurement accuracy of th ...
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... each pair of parallel driven T-PMs. In addition, the bus bars of the main circuit are arranged and connected to ensure wide parallel plates and thus reduce inductance. With these measures, as shown in Fig. 2 b), the parallel drive current is equally distributed through the two T-PMs. 2.2 Vibration-r ...
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... look towards interplanetary travel. These small satellites could provide a cost effective means of exploring the galaxy, using off the shelf components and piggy-backing on other launch vehicles with more expensive payloads. However, CubeSats are traditionally launched into Low Earth Orbit (LEO), an ...
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... VSI and CSI. The VSI topology based DVR has buck type output voltage characteristics thereby limiting the maximum voltage that can be attained. In CSI topology an additional dc–dc buck (or boost) converter is needed. The additional power conversion stage increases system cost and lower efficiency an ...
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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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