Homework 2
Question 1
a)
PSpice Schematic
SQ RT( 27)* V(% IN+, %I N-)* (V(% IN+, % IN-)- 1)*( V(% IN+, %IN -)-2 )
G1
IN+
OUT+
INOUTGV ALU E
ou t
I
RL
{R L}
V0
B
0V dc
Cd y na mic
1n
I
3V
IC = 0
Vb ias
PARAMETERS:
RL = 2
0
Plot of diode current and load line (VO : 0 to 5V)
400A
200A
0A
-200A
0V
0.5V
I(G1)
1.0V
1.5V
2.0V
2.5V
3.0V
3.5V
4.0V
4.5V
5.0V
I(RL)
V_V0
Plot of diode current and load line (VO : 0 to 2.2V)
4.0A
2.0A
0A
-2.0A
0V
0.2V
I(G1)
0.4V
I(RL)
0.6V
0.8V
1.0V
1.2V
V_V0
1.4V
1.6V
1.8V
2.0V
2.2V
b)
Updated schematic with VO removed
SQ RT( 27)* V(% IN+, %I N-)* (V(% IN+, % IN-)- 1)*( V(% IN+, %IN -)-2 )
ou t
G1
IN+
OUT+
INOUTGV ALU E
V
I
RL
{R L}
B
I
3V
Cd y na mic
I
1n
2.9 36m V
IC = 0
Vb ias
PARAMETERS:
RL = 2
0
3.0 00V
Plot of transient run data (IRL, IC, ID, VOut vs. Time)
0V
1.5
1.0
0.5
0
0s
I(G1)
0.1ns
I(RL)
V(OUT)
0.2ns
-I(Cdynamic)
0.3ns
0.4ns
0.5ns
0.6ns
0.7ns
0.8ns
0.9ns
1.0ns
120mV
140mV
160mV
180mV
200mV
Time
Plot of transient run data (IC vs. VOut)
1.5A
1.0A
0.5A
0A
0V
20mV
-I(Cdynamic)
40mV
60mV
80mV
100mV
V(out)
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