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MOSFET Explained - How MOSFET Works

Posted: Wed Jan 07, 2026 4:45 pm
by Gregski
if you've ever wondered how the guts of an inverter work then you will appreciate this most excellent explanation of a MOSFET, trust me I have seen many bad ones, enjoy!



Re: MOSFET Explained - How MOSFET Works

Posted: Wed Jan 07, 2026 4:52 pm
by Gregski
using a brilliant water analogy

here the big inlet pipe represent high voltage/high current, it has a spring loaded disc aka valve (the orange piece) closing and opening the flow

it is controlled by the smaller branch pipe, in other words requiring much lower voltage for control

Spring Loaded Disc aka Valve.jpg

small pressure or voltage applied to the Gate pin on the MOSFET, not enough to open the valve
Small Pressure Applied To MOSFET.png

lots of pressure or voltage applied to the Gate pin on the MOSFET, now enough to open the valve
Lots Of Pressure Applied TO MOSFET.jpg