epitaxial
TIP120/TIP121/TIP122 NPN Epitaxial Darlington Transistor • Medium Power Linear Switching Applications • Complementary to TIP125/126/127
BT169 is neither an NPN nor a PNP transistor. BT169 is a thyristor, otherwise known as a silicon controlled rectifier.
silicon ang germanium there are two types of transistor \ 1. PNP 2. NPN silicon ang germanium there are two types of transistor \ 1. PNP 2. NPN
TIP120/TIP121/TIP122 NPN Epitaxial Darlington Transistor • Medium Power Linear Switching Applications • Complementary to TIP125/126/127
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What is a 2N2369 transistor.It's an npn switching transistor.
It is an npn power transistor
An NPN transistor must be biased with a positive voltage in order to "turn on". A silicon transistor must have at least .07 volts on its base to start current flow from the collector to the emitter of the transistor. Some transistors have different biasing voltages. Like a germanium transistor will "turn on" at .02 volts.
2N2222
is zero
npn is preferred to pnp since n-doping can be pushed to higher values without damaging silicon lattice. due to this fact, doped regions can be less resistive. difference between npn and pnp is becoming smaller and smaller, tho.
Generally upstream is closer to the positive (+) voltage source. In the case of an NPN transistor upstream of the transistor is the part of the circuit from (+) to the NPN collector pin. Downstream of the transistor is from the NPN emitter pin to the ground / sink / negative (-) terminal.