Utilizing spectre simulator and the models file of 5V standard CMOS process , a nmos transistor is simulated, and the DC operation point of this nmos transistor is printed in the picture. Under the condition of normal operation state, i have some doubts concerning its DC parameters:
1. Why is the "ibulk" current so big?
2. What is the relation of the DC parameters in the blue mark rectangle? why the Vdsat doesn't equate (Vgs-Vth)? According to the Vds,vgs and vth, how to calculate this vdsat and get 647.4mV?
Pls guide me! Any reply is very appreciated! Thks in advance!