Table of Contents
- 1 What is the mode of operation of transistor if base emitter junction is reverse biased and base collector junction is also reverse biased?
- 2 What is the voltage applied across the emitter base junction?
- 3 What is the forward biased voltages of base to emitter?
- 4 How does an NPN BJT work?
- 5 Is emitter base junction is in forward bias and base-collector junction is in forward bias then transistor is in?
- 6 When emitter base & collector base junction are forward bias then transistor can operate in?
- 7 Which of the following is the correct relationship between base and emitter current of a BJT IB β ie IB ie IB β 1 ie ie β 1 IB?
- 8 How does the base-emitter junction work in a PNP transistor?
- 9 How many PN junctions are in BJT?
What is the mode of operation of transistor if base emitter junction is reverse biased and base collector junction is also reverse biased?
The supply of suitable external dc voltage is called as biasing. Either forward or reverse biasing is done to the emitter and collector junctions of the transistor….Transistor biasing.
| EMITTER JUNCTION | COLLECTOR JUNCTION | REGION OF OPERATION |
|---|---|---|
| Reverse biased | Reverse biased | Cutoff region |
What is the voltage applied across the emitter base junction?
In the case of the common emitter circuit the emitter voltage is FIXED at 0V and will limit the base voltage to 0.6V. When fully turned ON the voltage across the transistor is the saturation voltage (Vsat) – typically about 0.1 – 0.3V depending on transistor type and collector current.
What is the forward biased voltages of base to emitter?
One voltage is the forward voltage of a conventional diode (the base-emitter junction of a transistor), which has a negative temperature coefficient. The other is the difference between the forward voltages of two diodes with the same current but operating at two current densities.
When emitter junction is reverse biased and collector junction is forward biased the transistor is said to be in?
Saturation: Emitter diode and collector diode are on. Active: In the active region, the emitter diode is on and the collector diode is off. Collector base junction is reverse biased, whereas base emitter junction is forward biased. The transistor is said to operate in the active region.
What is emitter base junction?
In the active region the emitter base (input region) junction is forward bias, and the base collector (output) junction is reverse bias. Now, we will look at the circuit in which a transistor is connected in common base configuration.
How does an NPN BJT work?
The NPN transistor is designed to pass electrons from the emitter to the collector (so conventional current flows from collector to emitter). The emitter “emits” electrons into the base, which controls the number of electrons the emitter emits.
Is emitter base junction is in forward bias and base-collector junction is in forward bias then transistor is in?
In the active mode of transistor operation, the base-emitter junction is forward biased and the base-collector junction is reverse biased.
When emitter base & collector base junction are forward bias then transistor can operate in?
Working of PNP Transistor As shown in the following figure, the emitter to base junction is forward biased and the collector to base junction is reverse biased. Forward bias on the emitter to base junction causes the holes to flow from P type emitter towards the bias. This condition formulates the emitter current (IE).
In what ways are the emitter base and collector base junction biased generally?
As shown in the above figure, the emitter to base junction is forward biased and the collector to base junction is reverse biased.
How is the base-emitter junction of the transistor biased?
In typical operation, the base–emitter junction is forward biased, which means that the p-doped side of the junction is at a more positive potential than the n-doped side, and the base–collector junction is reverse-biased.
Which of the following is the correct relationship between base and emitter current of a BJT IB β ie IB ie IB β 1 ie ie β 1 IB?
Explanation: The correct mathematical expression are Ie = (1 – ß) Ib and Ib = (1 – α) Ie respectively.
How does the base-emitter junction work in a PNP transistor?
Since the base-emitter junction is forward-biased, holes in the emitter region can move through the base-emitter junction and enter the base region. At the same time, electrons in the base region can also move into the emitter region. Inside the PNP transistor, the emitter current is due to the movement of holes from the emitter to the base region.
How many PN junctions are in BJT?
A BJT consists of two pn junctions so it is analogous to two back to back connected diodes as shown in fig 1.1. A transistor is classified into two types based on its construction. 1. NPN Transistor
What is the operation of NPN transistor?
Operation of NPN Transistor The base-emitter junction is forward biased by the dc source V EB and the collector-base junction is reverse biased by the V CB. So the depletion layer width at E-B junction is reduced and depletion layer width at the C-B junction is increased. Operation: The operation of the NPN transistor as follows:
What is a bipolar junction transistor (BJT)?
Note: The usage of the term transistor in this article will be used for bipolar junction transistor (BJT). A BJT consists of two pn junctions so it is analogous to two back to back connected diodes as shown in fig 1.1.