Question

LAB 4: CURVE TRACER

Answer 1

whats ur problem in it
plz mention here!

Answer 2

Yeah, I have no idea how to do the equations at the bottom of the lab.

Answer 3

to make the system you will need 2 sources one set to triangle wave and the other set to DC. both will be connected to ground from negative terminal the source of the triangle will connect to a current probe and then to a mosfet....the mosfet will also connect to the DC source and ground There will be a probe set to "x-axis" on the node by the triangle source...if you get confused check out this drawing
https://6002x.mitx.mit.edu/discussion/question/42785/lab4-not-getting-green-on-the-graph

now you should make multiple circuits with the DC source at 0V,, 1.0V, 1.5V, 2.0V, 2.5V and 3V
no need to do 0.5V (actually the only one really needed is 3V)
*graph should have voltage on x-acis and current on y-axis

now for the analysis...
graph at t=0.003

1.take cursor to 1V and read the current on the 3V curve...then using R=V/I you should be able to solve for R

2. now to solve for i they give you the formula
ids1/ids2=(vgs1-Vt)^2/(vgs2-Vt)^2
now go back to the graph and pick a voltage...I used @3V and you should read what the current is on both the 2.5V and 3V curves --> this will give you 1ds1 and ids2 and use Vgs1 as 2.5V and Vgs2 as 3V and solve for VT

3. Very easy go back and plug values into ids=k/2(Vgs-VT)^2 to solve for k

Answer 4

I