Hi
I am designing high speed cmos clocked comparator. I want to add manually thermal noise to the input voltage source.
we can do it in two ways, either as a noise file or as a frequency noise pairs ion vsource element. I generated a file by doing noise analysis to a simple resistor divider circuit, By referring this file in the comparator circuit at the input it is not showing any impact .
You could poor-boy it by attaching a rack of parallel
current sources that inject chaotic signals, and use
the transient analysis (eye diagram style, perhaps).
I have done this many times; tnoise, never.
It will give you application-realistic, observable info
but will not give you the quantitative noise figure/#.
Which you want, maybe defines the method to use.