Discussion
What does a Widlar current source achieve in an input stage's bias?
Answer: C
Adding a small resistor in one emitter of a mirror makes the copied current far smaller than the reference, so microamps can be generated without the megohm resistor a plain mirror would need - which matters because large resistors occupy impossible area on a chip. Supply independence and temperature tracking are separate properties of other arrangements. A technique that exists because one component is expensive in a given technology is worth recognising as such.
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