i really not sure why my vee got problem.it is connected to -15v.i am really a beginner,maybe i cannot follow your meaning,can you modify the circuit for me?
I changed one of your output transistors to a generic PNP, because my LTSpice didn't have a model for yours. That's the only change besides correcting vee. Try running my .asc file. It that doesn't work, then I just don't know.
BTW, your differential stage was OK. I am just used to seeing it drawn differently.
You never answered my question: Why are you doing this? Is it a school assignment? If so, what kind of program are you in. I whet to school for a VERY long time, and have been working in the field for almost 30 years. If you want this, you have to make a commitment.
Many of us learned Electronics in school and in university.
A few of us learned electronics themselves.
Since you know such a little amount of electronics then maybe you should do something else (gardening, catching butterflies?).