Discussion
Consider the following pairs of quantity and its definition.
Input offset voltage - The difference needed to zero the output
Input bias current - The average of the two input currents
Input offset current - The difference between the two input currents
Common-mode rejection ratio - Common-mode gain over differential gain
How many of the pairs given above are correctly matched?
Answer: C
The first three are correctly paired and the fourth is inverted: the rejection ratio is the differential gain over the common-mode gain, so a good stage has a large one rather than a small one. Getting the ratio the right way up matters because the inverted form would be a number far below one and would look like a fault. A figure of merit should grow as the device improves, which is a quick check on whether a ratio has been written the right way round. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.
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