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How to measure NF of LA? Need Help again.

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R

rats

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I design limiting Amp, just at simulaton level. It is 10Gb/s LA. gain is 47dB.
1.I have not design input buffer and output buffer. using ST 0.13 process
2.How can I measure the NF in cadence?
3Is there any NF difference between the LA core only and with inan dout put buffer? I need help.
As I knew , I shall remove input source, put a port intead. Then in pssI shall choose beating Freq, shall 5GHz? About freq sweep range, what I shall choose? About sweep type? I also don't know what I shall do. Please help me
 

Another good simulation to do to check input sensitivity of your limiting amp is to do an input referred noise simulation.

Your simulation results, which will be in V_rms will be an additive noise.

Input sensitivity (mVpp) = SNR * V_rms

For BER=10E-9 is 12 and for BER=10-12 is 14.
 

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