thanks Ashish-chauhan!
* concerning the noise simulation, i am using spectre and not Hspice!
*concerning the BNG integrartion in same chip that contains the LDO, there is a point that i found not clear : the input voltage of this BNG which is, i think, vdd should be stable, or when doing the line regulation the vdd changes.
so how can i manage to fixe the input voltage of the BNG? could it be an extra voltage source or the output voltage of the LDO.
note: when simulating the LDO, i used a Vdc voltage that generates 1.2V to replace the bandgap. and now i am trying to replace this ideal voltage source by a bandgap that was already prepared.
what should i do to solve this problem!
thanks.