Experiment #4
MOSFET Common Source Amplifier
Executive Summary:
The MOSFET is a voltage controlled current source. It controls the amount of current
flow through the Drain-Source by creating fields between the drain and source. The field works
as a connection between the drain and source.
In this experiment, we used MOSFET’s common
-
source configuration to create a voltage amplifier. The gain that we calculated for this
configuration was about 13.13. The Input impedance was high: about 21.5K
Ω
. The output
impedance was relatively low: about 829
Ω
. The gain was inverted which was yielded through
the hybrid-pi model. The gain was relatively low compared to the BJT.
Objective:
To experiment on design, analysis, construction and testing of a MOS field effect
transistor common source amplifier.
Diagrams:
Figure 1
Data:
R_L
1K
R1
360k
R2
160k
Rs
200
Rd
910
C3
100u
C1
100u
0
10Vdc
0
R_S
20k
0
C2
100u
V9
.5Vac
0Vdc
M1
BSP110/PLP
V
V
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Measured Value
Measured Gain
Calculated Val.
|%ERROR|
No Load
V
IN
(V)
0.11
Av =
13.13
(Inverted)
11.4
15.18
V
OUT
(V)
2.625
Loaded
V
IN
(V)
0.11
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- Spring '11
- MITTSKUS
- Amplifier, Volt, Electronic amplifier, common source amplifier, enhancement mode MOSFET
-
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