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(In short, this means that you can copy and modify the image freely as long as you provide attribution; preferably in the form of a link back to this page.) This W3C-unspecified circuit diagram was created with the Electrical Symbols Library .
Description: PNP transistor symbol with case (IEEE 315). Note: A little confusing on the BJT page, because the NPN is drawn with Collector (C) on the top, while here it is drawn on the bottom.
Practical Electronics/Bipolar Transistors/PNP Transistor Practical Electronics/Basic Components Electronics Fundamentals/Semi Conductor Devices/Transistor/PNP Transistor
Description: A schematic diagram of the Ebers-Moll models of a PNP BJT. The base, collector and emitter currents are I B, I C and I E, the common-base forward and reverse current gains are α F and α R, and the collector and emitter diode currents are I CD and I ED. Date: 4 August 2010, 05:26 (UTC) Source: Ebers-Moll_Model_PNP.PNG
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The circuit symbol is also shown. A p–n junction is a combination of two types of semiconductor materials , p-type and n-type , in a single crystal . The "n" (negative) side contains freely-moving electrons , while the "p" (positive) side contains freely-moving electron holes .
The diagram shows a schematic representation of an NPN transistor connected to two voltage sources. (The same description applies to a PNP transistor with reversed directions of current flow and applied voltage.) This applied voltage causes the lower p–n junction to become forward biased, allowing a flow of electrons from the emitter into the ...