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Laboratory 7 Bipolar Transistor Biasing and Small Signal Behavior
Laboratory 7 Bipolar Transistor Biasing and Small Signal Behavior

... This is a linear relationship between VCE and IC. The load line can be superimposed on a set of VCE-IC transistor characteristics. The slope of the DC load line is -1/(RC+RE) ⎯ it intersects the horizontal axis at VCE = VCC and the vertical axis at IC = VCC/(RC + RE). A transistor amplifier is typic ...
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... II. SERIAL-LINK AT HIGH FREQUENCY The designers use 200 milli-volt peak to peak differential swing for the general serial-link structures and because of these low swings only, a small amount of stray signal can also create a significant problem. As a result, the effect of noise in a transmission lin ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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