Hello,
I performed a DC OP simulation and I back-annotated the basic OP parameters and all terminal currents of a PMOS device in my circuit:
![](https://s9.postimg.org/l6iu0nm0f/PMOS.png)
I was quite surprised to see that only half the drain current/leakage comes from the bulk (3.428pA). The current through the channel is tiny (3.871fA) yet there is a source current that amounts to the remaining half of the leakage.
To identify where the source current comes from, I printed all the DC OP parameters for P8:
![](https://s18.postimg.org/gezxukzs9/image.png)
To my surprise, there is no bulk current flowing through P8, and the total drain current of 6.854pA in the screenshot above appears to be modeled by the "ide" parameter.
1) What are "ide", "ibe" and "idb" parameters?
2) I am assuming that "id" is the total drain current which should match the annotated drain current above; if not, and this is actually parameter "ide", then what is "id"?
3) Most importantly and more to the point, where is the total drain current coming from? How can I find out?
Thanks very much in advance for your help :)