Transistor diode model
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In a diode model two diodes are connected back-to-back to make a PNP or NPN bipolar junction transistor (BJT) equivalent. This model is theoretical and qualitative.
Examples
=PNP transistor=
To make a PNP transistor, the cathodes of both diodes are back-to-back connected to form a large N type base region.{{Cite web|url=https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/info/comp/active/BiPolar/page1.html|title=BiPolar Transistors - Page 1}}
=NPN transistor=
Base biasing
As the base region is a combination of two anodes or two cathodes, and is not lightly doped, more base biasing is required for making this model operational.{{citation needed|date=November 2020}}
References
External links
- https://en.wikiversity.org/wiki/Electronic_Circuits/Introduction_to_the_simple_diode_npn_model
- https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/info/comp/active/BiPolar/dtob.gif
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