This video provides background to a detailed discussion on Power BJT. Its an introduction to Power BJT and after that I go in detail to discuss this device. Transistor is normally employed as an amplifier in analog electronics. However, in power electronics transistor is employed as a switch.
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https://www.youtube.com/watch?v=-FiIhVcqWKA
Suspension type insulators are extensively used in overhead transmission system. This overview will help learner understand next topic with more insight
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https://www.youtube.com/watch?v=FIjXiAZUsCo
This video provides introduction to Switching models which will be utilized to explain the switching characteristics of MOSFET
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https://www.youtube.com/watch?v=y6Xau3CeGVo