There is, bhikkhus, a not-born, a not-brought-to-being, a not-made, a not-conditioned. If, bhikkhus, there were no not-born, not-brought-to-being, not-made, not-conditioned, no escape would be discerned from what is born, brought-to-being, made, conditioned. But since there is a not-born, a not-brought-to-being, a not-made, a not-conditioned, therefore an escape is discerned from what is born, brought-to-being, made, conditioned. (Sutta pitaka , khuddaka nikaya , udana 8:3)
That is Nibbana, and not god or Brahman or any kind of Ultimate Reality. It is that which is experienced by the mind, when it is completely free of all fetters and defilements.
I quote from this answer below. Please see that answer for details.
So, Nibbana is not a thought of the mind, not a concept of the mind, not a state of the mind, not a state of consciousness and also not a feeling. However, when the mind experiences this Nibbana, which is not conditioned, not compounded, not suffering, not impermanent, not arising, not ceasing and not changing, it experiences bliss. The mind can therefore experience Nibbana, but it cannot feel it or think about it.
Sukha or happiness for an unenlightened person is experienced when encountering pleasant feelings (from the six senses) or when encountering the cessation of painful feelings (from the six senses). But for an arahat, sukha or bliss (in this context) is experienced when encountering neutral feelings, no feelings and Nibbana.
It is similar, Maimonides of the Hebrew faith also ended up saying that God could only be described through negation, and the Hindus say Brahman is 'neti neti' - 'not this, not that'.
However the difference between nibbana and God is that God is Ultimate Reality, which is where the term differes from nibbana.
If God is seen as a '1' to the '0' of our daily experience, then nibbana is the '0' to the '-1' of our daily experience. It is perhaps more melancholy, but it is less contrived, as no 'thing' needs to be pulled out of a hat.
God, is not neccesary. Buddha didnt said, it exist, doesnt, both or neighther. Birth is the origination of dependant phenomenon. Its like Electric field is always present with magnetic disc around it. Magnetic disc can be called as dependent origination, as it attract the Iron. Iron can be term as 5 khandas and when one attain nibbana, it cease to that magnetic disc. Know for sure, that magnetic disc never ceases, it always accompanied by electric field. Magnetic field can be term as anatta. You are asking about electric field, the source of life. If you see above statements, then question of electric field is not neccessary. Real question likes in how to attain cessation!
There is no god, creator of all. Nibbana is the cessation of the manifested, cessation of perception of the manifested, and cessation of the memory of the manifested. Nothing remains of mind as you know it. Nibbana is unborn. It creates nothing. The question is, how does manifestation come into being?