Table of Contents
- 1 Which of the following regions of operations are mainly responsible for heating of the transistor under switching operation?
- 2 Which region is used for BJT switching operation?
- 3 In which region a transistor acts as an open switch?
- 4 What is Silicon BJT circuit?
- 5 In which region of operation a BJT works as an amplifier?
- 6 What is saturation region in BJT?
- 7 What is the active region of BJT?
- 8 In what condition does BJT acts like an open switch?
- 9 What are the different operating regions of BJT?
- 10 What are the modes of operation of BJT transistor?
- 11 What is the difference between base and emitter-base junction in BJT?
Which of the following regions of operations are mainly responsible for heating of the transistor under switching operation?
Saturation region
The regions of operation which are mainly responsible for heating of the transistor under switching operation are: 1. Saturation region.
Which region is used for BJT switching operation?
The transistor acts as a switch in the cut-off mode and the saturation mode. The transistor is fully off in the cutoff region and fully on the saturation region.
What are the three regions of operation of BJT?
A bipolar junction transistor (BJT) has three operating regions:
- Cut off ( for NPN BJT)
- Active region ( for NPN)
- Saturated ( for NPN)
In which region a transistor acts as an open switch?
saturation region
Transistor acts as a switch in the saturation region and cutoff region. The emitter-base junction and the collector-base junction is reverse biased in the cutoff region. Both the junctions are forward biased in the saturation region.
What is Silicon BJT circuit?
A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. Hundreds of bipolar junction transistors can be made in one circuit at very low cost.
How do BJT transistors 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.
In which region of operation a BJT works as an amplifier?
The transistor can work in three different regions like active region, cutoff region & saturation region. Transistors are turned off while working in the cut-off region and turned on while working in the saturation region. Transistors work as an amplifier while they work in the active region.
What is saturation region in BJT?
The second region is called “saturation”. This is where the base current has increased well beyond the point that the emitter-base junction is forward biased. In fact, the base current has increased beyond the point where it can cause the collector current flow to increase.
How is BJT region of Operation Determined?
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 |
|---|---|---|
| Forward biased | Reverse biased | Active region |
| Reverse biased | Forward biased | Inverse active region |
| Reverse biased | Reverse biased | Cutoff region |
What is the active region of BJT?
For the BJT, there are three regions of operation; Active region: In this region, the base emitter junction is forward biased and the base-collector junction is reverse biased. This region is the normal transistor operation mode for amplification, and is characterized by the transistor current gain value, beta.
In what condition does BJT acts like an open switch?
Explanation: In this mode, both the junctions are reverse biased. The transistor has practically zero current because the emitter does not emit charge carriers to the base. There is negligibility current due to minority carriers. In this mode the transistor acts as an open switch.
How a transistor acts as a switch?
One of the most common uses for transistors in an electronic circuit is as simple switches. In short, a transistor conducts current across the collector-emitter path only when a voltage is applied to the base. When no base voltage is present, the switch is off. When base voltage is present, the switch is on.
What are the different operating regions of BJT?
The operating regions of BJT are: 1 Forward active or active region 2 Reverse active or inverted region 3 Saturation 4 Cut-off More
What are the modes of operation of BJT transistor?
Bipolar Junction Transistor. BJT operation modes. The transistor can be operated in three modes: Cut-off mode. Saturation mode.
What is the working principle of the base BJT?
BJT is a current controlled device. The current flows from emitter to collector or from collector to emitter depending on the type of connection. This main current is controlled by a very small current at the base terminal.
What is the difference between base and emitter-base junction in BJT?
The base is always reverse bias with respect to emitter so that it can emit a large number of majority carriers. It is the most heavily doped region of the BJT. The emitter-base junction should be always forward bias in both PNP and NPN transistors.