Post Go back to editing

What is residual noise (vs noise figure) and flicker of RF/IF Gain blocks

Hi all,

The question is related to noise figure of RF/IF gain amplifiers, and can be formulated in different variants.

1.a What was the signal level used to measure the noise figure of ADL5536 or ADL5602?

1.b If I provide a 0dBm signal with a noise level of -174dBc, what the output power/noise level would be?

     1.b.1 what if the signal is +5dBm with -179dBc?

     1.b.2 signal with -5dBm, -169dBc?

1.c. What is the residual noise of these amplifiers (providing a theoretical signal with -300dBc noise)?

The second question is:

2. What is the flicker corner of these amplifiers provided with a 0dBm signal?

Any help appreciated.

Regards,

Dorin

Parents
  • If you apply a 0 dBm signal with phase noise of -177 dBc/Hz at 1 KHz offset, then the absolute value of the phase noise is equal to -177 dBm/Hz. The output noise will be the sum of the input noise (that is the KT Noise of -173.8 dBm/Hz and the -177 dBm/Hz from your source; this is approximately -172 dBm/Hz) plus the gain plus the noise figure.

Reply
  • If you apply a 0 dBm signal with phase noise of -177 dBc/Hz at 1 KHz offset, then the absolute value of the phase noise is equal to -177 dBm/Hz. The output noise will be the sum of the input noise (that is the KT Noise of -173.8 dBm/Hz and the -177 dBm/Hz from your source; this is approximately -172 dBm/Hz) plus the gain plus the noise figure.

Children
No Data