Discussion
Why is a mixer often a significant noise contributor?
Answer: C
A passive mixer has conversion loss, so the Friis formula divides the following stage's noise by less than unity and the mixer's own contribution is undiminished. Frequency alone does not determine noise contribution. Local oscillator noise matters but is a separate mechanism. And signal handling concerns intermodulation rather than noise. Wherever a chain loses gain, the stages after it become more important to the noise budget. 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