The RF amplifier A is having 3 dB NF & 5 dB of gain, amplifier B is having 3.5 dB NF & 15 dB. For overall noise figure of the cascaded system, the correct statement is:

B as first stage & A as second stage minimum over all NF

A as first stage & B as second stage offers minimum over all NF

Both the combination will offer same overall NF

Over all NF will be less than 3 dB

The RF amplifier A is having 3 dB NF & 5 dB of gain, amplifier B is ha

1.	The RF amplifier A is having 3 dB NF & 5 dB of gain, amplifier B is having 3.5 dB NF & 15 dB. For overall noise figure of the cascaded system, the correct statement is:
A.	A as first stage & B as second stage offers minimum over all NF
B.	B as first stage & A as second stage minimum over all NF
C.	Both the combination will offer same overall NF
D.	Over all NF will be less than 3 dB
Answer» B. B as first stage & A as second stage minimum over all NF