Unipolar transistor basic variable transconductance is commonly marked by:
It is commonly used in calculations where we need drain current, Ugs, rds(on), and similar.
I have also seen many equations for calculating upper variables but here mostly used variable is known as "conduction parameter" (unit: mA/V square). It says (in the pdf file) that "K" should be given by manufacturer. But none datasheet till now had any value like this one.
Question: Do these two (transconductance & conduction parameter) have something in common? Can one replaced with another (probably not)? Are these equations with conduction parameter even used in practice?