Transistor Used

Can an npn transistor be used as a pnp transistor and vica versa?

I am doing a project and it says it requires the use of npn transistors and pnp transistors. Is there a way to make an npn act as a pnp and vice versa and if so how would you go about doing this? Thanks.

no, they are totally different, require different polarity voltages.

You can replace all NPNs with PNPs (and vv) if you reverse the polarity of all the voltages in the system.

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References

IEEE Lasers and Electro-Optics Society Website

OÏDA (Association Optoelectronics Industry Development)

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