Dear all,
I want to include a voltage noise source with a custom spectrum given in a file in a transient noise simulation. For illustration purposes, I made a minimal example as shown below. It merely contains a "vdc" source from "AnalogLib" with "vdc=0V", where a very simple noise data file containing just three points is entered.
As can be seen in the noise simulation at the upper right, the data seems to be interpreted correctly. However, when I run a transient noise simulation with 1ms duration (see its setup in the image), there seem to be jumps in the order of tens of millivolt at the very beginning that remain a "dc offset" during the whole simulation time. I am using the Cadence Spectre simulator, but APS returns the same results.
I did not expect this behavior, I rather expected my noise sources to have an average of 0V during each 1ms-run. Am I overlooking something, or what is going on here?
Thank you!
Best regards,
thegon