ENGR337 Lab 2020 Spring
Lab 1 LTSpice and Lab Report Preparation
Name: James Ferguson
Email: jwferguson@fortlewis.edu
Lab 1: LTSpice and Lab Report Preparation

Task 1
Recreate circut and compare calulated, simulated and measured values

Materials and Methods
Parts
2x
 5v voltage sources
3x
 2k resistors
3x
 3k resistors

LT Spice Code
test
V1 1 0 5
v2 2 0 5
R1 1 3 2k
R2 3 4 2k
R3 4 2 3k
R4 0 3 2k
R5 0 4 6k
.tran 0 1 0.01

Results

 V1
 V2
 V3
 V4
 IR1
 IR2
 IR3
 IR4
 IR5
sim
 5.0000V 5.0000V
 2.6668V
 2,9997V
 1.1mA
 -0.16mA
 -0.7mA
 -1.3mA
 -0.5mA
calculated
 5.0000V
 5.0000V
 2.6667V
 3.0000V
 1.1mA
 -0.16mA
 -0.66mA
 -1.3mA
 -0.5mA
measured
 4.99V
 4.99V
 2.90V
 2.98V
 1.04mA
 -0.164mA
 -0.554mA
 -1.310mA
 -0.497mA

Discussion
simulated and calculate values where the same when accounting for, measured values differed because of inacuracies in resistor values and powersupply voltage.

 Task 2
Recreate AC circut and measure values

Materials and Methods
LT Spice Code
Task 2
V1 0 1 SINE(0 12 60 0)
R1 1 2 30
C1 2 0 100u
.tran 0 1 0.01

Results

amplitude attenuation: 0.63776582021
time-delay: 2.1374046ms

Task 3
Recreate circut and perform DC sweep

Materials and Methods
LT Spice Code
Task 3
V1 1 0 0
R1 1 2 30
R2 2 0 30
.dc V1 -2 5

Results


Task 4
Recreate circut and perform AC analasys

Materials and Methods
LT Spice Code
Task 4
V1 1 0 ac 1
R1 1 2 30
C1 2 0 100u
.ac dec 1000 1 1MEG

Results


Task 5
Recreate circut and measure time delay

Materials and Methods
LT Spice Code
Task 5
V1 1 0 PULSE(0 5 1u 1p 1u 2.1u)
R1 1 2 1k
C1 2 0 27p
.tran 10u

Results

Simulated Time Delay = 28.507042ns
Calculated Time Delay = 1 * 10^3 * 27 * 10^-12 = 27ns