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AD628 High Common-Mode Voltage Programmable Gain
AD628 High Common-Mode Voltage Programmable Gain

... amplifier and is accessible to the user at Pin 4. A capacitor may be connected to implement a low-pass filter, a resistor to further reduce the output voltage, or a clamp circuit to limit the output swing. The uncommitted amplifier is a high open-loop gain, low offset, low drift op amp, with its non ...
Why control techniques depend on heater element materials
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... (115 230 400 etc) up to around 6kW rating. The high cold-inrush current can decay in a second or two because of the low filament mass and consequent fast rise to working temperature of some 2500 ºC. Current limiting is inherent in the resistance attained at working temperature. Automatic current li ...
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... of this inverter are: transformerless topology, grounded PV array, and only film capacitors. The motivations are to reduce cost, eliminate leakage ground currents, and improve reliability. The use of Silicon Carbide (SiC) transistors is the key enabling technology for this particular circuit to atta ...
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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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