Discussion
Why is emitter bias with a single supply only partly effective?
Answer: A
With the base fed through a single large resistor, the base voltage moves as the base current changes, so the emitter feedback is diluted. The gain reduction and the need for a bypass are consequences of the emitter resistor rather than limits on its stabilising action. The remedy is to fix the base voltage with a divider stiff enough that base current changes hardly move it, which is precisely what the fourth arrangement does. Most errors on this topic come from carrying a result across from a neighbouring scheme where it does not hold.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development