What happens if you reverse a transistor?

Now, if you use the transistor in reverse, the emitter becomes the collector and the collector becomes the emitter, and its quite simple to see what happens: (1). As the collector doping is less than the emitter doping, the hole current in the collector (now the emitter) increases, leading to lower beta.

What happens when a transistor is turned on?

When the transistor is turned on, current flows through the collector and emitter, thus lighting the LED. When the transistor is turned off, the transistor acts as an insulator, and the LED doesn’t light. R2: This 1 kΩ resistor limits the current flowing into the base of the transistor.

Are transistors reversible?

1 Answer. The transistor is in reverse active mode. The collector acts as the emitter and the emitter as the collector. This is possible because NPN reversed is still NPN.

Are transistors directional?

Transistors typically have one round side and one flat side. If the flat side is facing you, the Emitter leg is on the left, the Base leg is in the middle, and the Collector leg is on the right (note: some specialty transistors have different pin configurations than the TO-92 package described above).

Which transistor mode gives the inverted output?

common emitter transistor amplifier
The common emitter transistor amplifier is the only configuration that gives an inversion, 180°, between the input and output signals. The reason for this can be seen from the fact that as the input voltage rises, so the current increases through the base circuit.

How does bipolar junction transistor work?

How does BJT Work? For an NPN transistor, it consists of a layer of P-doped semiconductor between two layers of N-doped material, where electrons are passed from the emitter to the collector instead. The emitter then “emits” electrons into the base, with the base controlling the no. of electrons the emitter emits.