as I want to calculate the transfer function of circuit that is meant to generate source current using an Op amp as control loop, I need the gm and r0 of the mosfet(to determine the transfer function of the Op amp current source with nMOSFET) here is the picture of MOSFET with showed parameters
and here are the link for the datasheet
https://docs.rs-online.com/c5c9/0900766b80dcb3d2.pdf
and here are the link for the datasheet
https://docs.rs-online.com/c5c9/0900766b80dcb3d2.pdf