What is the difference between emitter and collector for BJTs?
Also not that the collector voltage is higher than the base voltage. The main differences between emitter and collector are doping concentration and size. The emitter is heavily doped, while the collector is lightly doped. You could try to swap them, but you’ll get a very low \\$H_{FE}\\$, probably even less than 1.
Can a BJT have the same voltage as a diode?
Yes, BJTs have the same voltage drop across their junctions as common diodes, that’s 0.6V to 0.7V between base and emitter, and the same between base and collector. Since the junctions act like diodes they don’t conduct in both directions if you apply a voltage across the two pins.
How are the DC characteristics of a BJT determined?
The DC characteristics of the intrinsic BJT are determined by the nonlinear dependent current sources i B and i C . The exact functional descriptions of these two currents – as adopted by Spice – are rather complex and will not be given here. Interested readers can consult [Nagel, 1975] for more details.
What’s the difference between an emitter and collector in a transistor?
But conventional flow can’t explain the details of the working of a transistor, so here electron flow is shown. Also not that the collector voltage is higher than the base voltage. The main differences between emitter and collector are doping concentration and size. The emitter is heavily doped, while the collector is lightly doped.
What happens when an emitter and collector is shorted?
When an input signal is applied to base greater than cut in voltage the transistor conducts and the collector is shorted to ground. This is like a switch. For example, when the collector is shorted to VCC of 5V the output of the collector will get low. Similarly, when no voltage is applied to the collector the output will be logic high.
Is the base region the emitter or the collector?
The middle region is called the base and the outer two regions are called emitter and the collector. The outer layers although they are of same type but their functions cannot be changed. They have different physical and electrical properties.