3 pn Diode Principle - Part 1

3 pn Diode Principle - Part 1 - pn-Diode Principle Part 1...

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pn-Diode Principle Part 1
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Hi – Fi amplifier circuit design analysis frequency response transistor pn - diode n / p – type semiconductor field-effect transistor npn / pnp transistor semiconductor pn – diode applications low / high frequency response
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p n cathode anode
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Semiconductor Dode Notation :- ~ 0.5A ~ 25A Various Types of Junction Diodes :- ~ 3A ~ 30A ~ 400A
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pn - diode ideal switch !!! ideal diode !! R V DC R V I DC D p n + - R V DC 0 D I p n + -
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Diffusion Current :- Electron -ve charge Hole +ve charge diffuse diffusion current electrons holes
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Drift Current :- - + - - - - - - - - + + + + + + + + E ~ drift current E ~ - + E ~ fix charge fix charge
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pn - Junction Behaviour :- electron hole p-type n-type majority carriers minority carriers majority carriers minority carriers Diffusion Current majority carriers - - - + + + Drift Current minority carriers + ve ion - ve ion E ~
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? what happen at equilibrium ( steady state ) ? Diffusion Current = Drift Current net current = ZERO - - - + + + Depletion Region p-type n-type NO free carriers within the depletion region fix charges (ions) good conductor?
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3 pn Diode Principle - Part 1 - pn-Diode Principle Part 1...

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