I want to simulate the Noise figure for such a setup that first a band pass filter, then sample and hold, and then follower by amplifier, and ADC and so on.
Can i get the noise figure from source to each stage with Pnoise?
I understand that if the output is specified with voltage of two node but NOT specified by a port or probe, it won't exclude the noise from next stages in the NF calculation. So eventually, this is not the noise figure exactly upto such stage.
But how could I get the correct noise figure for each stage. And what i want to see is that the NF can be validated with just accumulate from one stage to the following. like NF04=NF01+NF12+NF23+NF34, where NF04 means NF from source to 4th stage.
Thanks a lot.
I don't know if this is an unusally question. But it should be common to ask what's the NF from stage two to stage three, isn't it?
The spectreRF manual suggest not use noise summary for Pnoise. Calculate by hand with result browse is not recommended as well. But there should be a simple way to get the NF from a non-port input to certain output node i guess.
Does any body have the same issue?
Or someone tell me this is not possible within cadence, so that i could move on.
Thanks in advance.