Amin’s Guidelines for Lab Report #4
Introduction
State the objective(s)/purpose(s) for this lab
Journal
(a) Draw a schematic of the circuit used to perform the experiment described
in Figure 4 of the lab manual. Indicate on this schematic to which SMU
each terminal of the NMOS was connected. Furthermore, mention how
each SMU was configured (e.g. was it kept at a constant voltage, swept
through a certain range, etc.).
1) Provide a printout of the IDS versus VDS plot obtained from the
parameter analyzer
2) Comment on the shape of the graphs. In particular, how does VDSAT
and IDSAT compare with theory (your comparisons should be
quantitative)?
3) Describe how one can compute λn from the IDS versus VDS plot
4) Calculate (show your work) a value for λn by taking the average of the
λn values computed for VGS = 2V, 3V, 4V, and 5V
(b)
Draw a schematic of the circuit used to perform the experiment described
in Figure 7 of the lab manual. Indicate on this schematic to which SMU
each terminal of the NMOS was connected. Furthermore, mention how
each SMU was configured (e.g. was it kept at a constant voltage, swept
through a certain range, etc.).
1) Provide a printout of the IDS versus VGS plot obtained from the
parameter analyzer
2) Using Excel (or other similar tool), find and plot the best-fit line
approximating the graph obtained in (b.1) above
3) Describe how one can compute VTn and Kn from the best-fit line
obtained in (b.2) above
4) Calculate (show your work) VTn and Kn
(c)
Draw a schematic of the circuit used to perform the experiment described
in Figure 8 of the lab manual. Indicate on this schematic to which SMU
each terminal of the NMOS was connected. Furthermore, mention how
each SMU was configured (e.g. was it kept at a constant voltage, swept
through a certain range, etc.).
1) Provide a printout of the IDS1/2 versus VGS plot obtained from the
parameter analyzer (use Excel or other similar tool)
2) Using Excel (or other similar tool), find and plot the best-fit line
approximating the graph obtained in (c.1) above
3) Describe how one can compute VTn and Kn from the best-fit line
obtained in (c.2) above
4) Calculate (show your work) VTn and Kn
(d)
Specify a PSpice model for your NMOS transistor. For λn, use the value
computed in (a.4) above. Calculate the average values of VTn and Kn
from (b.4) and (c.4) above, and use these average values in your PSpice
model.
(e)
Draw a PSpice schematic corresponding to Figure 4 of the lab manual.
Label each node/element on your schematic so that each corresponds to
the names specified in your netlist.
1) Obtain an IDS versus VDS plot. Provide a printout of this plot overlaid
on the one obtained from the parameter analyzer in (a.1) above (Excel
may come in handy here)
(f)
Draw a PSpice schematic corresponding to Figure 7 of the lab manual.
Label each node/element on your schematic so that each corresponds to
the names specified in your netlist.
1) Obtain an IDS versus VGS plot. Provide a printout of this plot overlaid
on the one obtained from the parameter analyzer in (b.1) above (Excel
may come in handy here)
(g)
Draw a PSpice schematic corresponding to Figure 8 of the lab manual.
Label each node/element on your schematic so that each corresponds to
the names specified in your netlist.
1) Obtain an IDS1/2 versus VGS plot. Provide a printout of this plot
overlaid on the one obtained from the parameter analyzer in (c.1)
above (Excel may come in handy here)
(h)
Repeat the above for the PMOS transistor for extra credit
Conclusions
Compare/comment on results/discrepancies between the VTn/Kn values
computed in (b.4) and (c.4) above.
Also, compare/comment on the
results/discrepancies between the overlaid plots in (e.1), (f.1), and (g.1) above.
Repeat this for the PMOS transistor for extra credit.