Npn transistor

Bipolära transistorer kan förekomma i två polariteter, som kallas NPN och PNP. Bokstaven N står för N-dopat och P står för P-dopat material. I båda polariteterna har emittern och kollektorn samma typ av dopning, och basen har motsatt typ av dopning. Basen ligger mellan emitter och kollektor och skiljer dem åt.

Here the majority charge carriers are the electrons. Transistorer kan delas in i två huvudtyper, bipolära transistorer baserade på PN-övergångar ( NPN eller PNP polaritet) samt unipolära fälteffekttransistorer (N-kanal eller P-kanal) med undergrupperna utarmningstyp och anrikningstyp. The same description applies to a PNP transistor with reversed directions of current flow and applied voltage. NPN transistor is one of the Bipolar Junction Transistor (BJT) types.

This applied voltage causes the lower P-N junction to become forward biase allowing a flow of electrons from the emitter into the base. When a third doped element is added to a diode in such a way that two PN-junctions are forme the resulting device is called a transistor. Used in the some Darlington pair circuits.

Working of NPN Transistors : As discussed above, the transistor is a current controlled device which has two depletion layers with specific barrier potential required to diffuse the depletion layer. The barrier potential for a silicon transistor is 0. V at 25°C for a germanium transistor.

Making of PNP Transistor. The PNP transistor configuration is shown below. The voltage between the base and emitter terminal VBE is. PNP- Transistoren werden für negative Spannungen verwendet.

NPN - Transistoren werden für positive Spannungen verwendet. Funktionsweise eines Transistors ( NPN ) Bei der Funktionsweise des Transistors muss man die Stromrichtung. V), along with operational currents and voltages to fit various applications.

The portfolio features low to ultra-low saturation voltage (VCE(sat) as low as 0. Below are a few example circuits.