Hello Ron
i have said earlier that for the current magnitude measurement i am using OP07 since the accuracy required is below the offset stated by OP07.I will dig some p-channel mosfets and test the source version today.
The sense resistor i am using is not precise for now.But WILL sure use a precise one actually.I am getting a board painted for this today since on a general purpose board i have lots of wires and links which must be adding to noise and offsets.
You have been very helpful..