CE 338 2021 Spring
Lab 4: MOSFETs and IV Curves
Nic Theobald
nstheobald@fortlewis.edu
MOSFETs and IV Curves
Introduction
This
lab covers the design and simulation of n-type and p-type MOSFET
transistors. MOSFETS are special in that they are voltage controlled
current sources that, as opposed to BJT transistors, don't draw current
when turned off. This lab was intended to familiarize students with the
MOSFET transistor, IV curves, and electricVLSI. I performed the same
lab in a previous course. I redesigned and ran everything, just like
before, but didn't detail the process in as much detail, during this
report.
Methods and Materials
Item
Quantity
LTspice
Electric VLSI
Ideal ADC/DAC Library
1
1
1
The schematic of the NMOS transsitor was first created (Figure 1). Then the layout for the NMOS was created (Figure 2). The NMOS was then simulated (Figure 3). The exact same process was followed for the PMOS transistor. DRC, NCC, and ERC checks were also performed.
Results
Design and
Simulate NMOS Transistor The schematic and layout for
the NMOS transistor was first created.
Figure
1: Schematic view of the NMOS transistor.
The schematic and layout for the NMOS transistor was first created.
Figure
2: Layout view of the NMOS transistor.
An LTspice simulation of the IV curve was performed.
Figure 3: Simulation of
NMOS IV curve.
Design and
Simulate PMOS Transistor The schematic and layout for
the PMOS transistor was first created.
Figure 4: Schematic view of the PMOS transistor.
The schematic and layout for the PMOS transistor was first created.
Figure 5: Layout view of the PMOS transistor.
An LTspice simulation of the IV curve was performed.
Figure 4: Simulation of PMOS IV curve.
Discussion:
This lab detailed the design and simulation of an NMOS and PMOS
transistor. The same procedures were followed at a previous time, so
this report was not as detailed.