ENGR 338 - Spring 2021
Lab 3
Name: Zane Sauer
Email:
zmsauer@fortlewis.edu
Introduction:
In this lab we were introduced to subcells and how they can be used when designing major projects.
Task 1: Create the schematic of the subcells for the R 2R ladder
![](img/DRC_schm_1.JPG)
Figure 1: DRC clear for schm of N-RWELL resistors for subcell
![](img/DRC_schm_2.JPG)
Figure 2: DRC clean for N-RWELL with icon
![](img/DRC_layout_1.JPG)
Figure 3: N-RWell layout for subcell, also shows DRC clean
Task 2: Create the layout of the subcells for the R- 2R ladder
![](img/DRC_schm_3.JPG)
Figure 4: Schematic view of R 2R ladder using subcells
![](img/DRC_Layout_2.JPG)
Figure 5: Layout view of R 2R ladder using subcells
![](img/NCC_R_2R_Ladder.JPG)
Figure 6: NCC clear for R 2R ladder
![](img/LTSPICE_Sim.JPG)
Figure 7: LTSpice simulation of new R 2R ladder in ADC R 2R DAC simulation
Conclusion:
Overall
this was a good lab to understand the usefullness of using subcells and
I beleive that they will continue to be useful throughout the semester.