Discussion
Why does an active load also raise the stage's voltage gain?
Answer: B
The gain is the transconductance times the load impedance, and a current mirror's output impedance is hundreds of kilohms rather than the few kilohms a practical resistor allows, so the stage approaches the device's intrinsic gain limit. Tail current, base current and input capacitance are unaffected. One component supplying both the conversion to single-ended and a large increase in gain is why the arrangement displaced resistive loading entirely. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.
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