Question
Download Solution PDFWhat is the biasing condition of junctions in bipolar junction transistor to work as an amplifier?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFBJT Amplifier:
- Transistors biasing is done to keep stable DC operating conditions needed for its functioning as an amplifier.
- A properly biased transistor must have its Q-point (DC operating parameters like IC and VCE) at the center of saturation mode and cut-off mode i.e. active mode.
- In the active mode of transistor operation, the base-emitter junction is forward biased and the base-collector junction is reverse biased.
Different modes of BJT operations are:
|
Mode |
Emitter-base Junction |
Collector-Base Junction |
|
Cut off |
Reverse |
Reverse |
|
Active |
Forward |
Reverse |
|
Reverse Active |
Reverse |
Forward |
|
Saturation |
Forward |
Forward |
Last updated on Jul 2, 2025
-> ESE Mains 2025 exam date has been released. As per the schedule, UPSC IES Mains exam 2025 will be conducted on August 10.
-> UPSC ESE result 2025 has been released. Candidates can download the ESE prelims result PDF from here.
-> UPSC ESE admit card 2025 for the prelims exam has been released.
-> The UPSC IES Prelims 2025 will be held on 8th June 2025.
-> The selection process includes a Prelims and a Mains Examination, followed by a Personality Test/Interview.
-> Candidates should attempt the UPSC IES mock tests to increase their efficiency. The UPSC IES previous year papers can be downloaded here.