input rms noise vs. input-referred noise

[x1346]

hi all,
if the input rms noise of an amplifier is AVrms, the bandwidth is BHz, and the input-referred noise is CV/rtHz. Assuming the noise is flat.
1. What's the relation between A and C? does C equal A/rtB?
2. How to convert A (or C) to decibal? is NF=10log(1+C/4kTRs) or NF=10log(1+C/kTRs)? which one is correct?
thanks in advance.
andy

 

[RCinFLA]

Think total noise power. Noise power will be evenly spread across bandwidth, assuming noise is flat.

Think noise temperature. Convert noise temp to NF if you want expressed in NF.