PNP transistor

A two-junction (bipolar) semiconductor transistor with a P-type collector and emitter, and an N-type base. In such a device, the current amplification arises from the injection of holes from the emitter into the base, and their subsequent collection in the collector. A PNP transistor is formed by introducing a thin region of N-type semiconductor material between two regions of P-type material.

Image              Image

A PNP transistor is "triggered" when its base is pulled low. Go here for more details on transistors in general; go here for a discussion of transistor usage in BEAM robots. Compare to NPN transistor. Note that both PNP and NPN are TLAs.

Legalities  Image 

Page author: Eric Seale  
This page was last updated on

This work is licensed under a
Creative Commons License.