Discussion
When would the 0.7 volt approximation be inadequate?
Answer: A
Bias work tolerates the approximation easily, but a circuit whose accuracy depends on two junctions agreeing to within millivolts - a current mirror, a differential pair, a bandgap reference - needs the exponential law and the actual currents. Ordinary changes in current, supply or resistance do not invalidate it. Knowing where an approximation stops working is more valuable than knowing the approximation. Checking the units of each quantity catches a wrong formula before the arithmetic begins.
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