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Lab #5 Overview
• Activity #1 - Simulation of an Op-Amp
inverting amplifier
• Activity #2 - Build and Test the Op-Amp
inverting amplifier
• Activity #3 - Determining the Gain and
Saturation of the Op-Amp inverting
amplifier
Simulation
• Run the simulated circuit found in the
class folder (Lab_5_Circuit.msm)
• Notice that a negative voltage is used as
the input to produce a positive output
voltage
• The gain is the output divided by the input
Build and Test
• Build and test the circuit
• Measure each resistor before assembling
into the circuit, so you can find the current
through each resistor later
Photo #1 - Power Connections on the Proto-Board
Make sure there is visible wire at the terminals, so that the
terminals are not clamping down on the wire insulation
+15V
ground
At this end there
will be a cut-out
and/or a dot next
to pin 1
ground
-15V
Photo #2
An example
circuit layout
of figure 5 on
page 4 of the lab
C1
R3
R1
Vin
C2
1
2
8
7
3
4
6
5
R2
R6
R4
R7
Vout
R5
Photo #3 - Vin Connections from the HP DC Power Supply
Vin
Determining Saturation
• Change the input voltage until the output
stops going up ( it has reached saturation)
• Switching the leads on the DC power
supply enable you to get positive voltages
on the inputs (and negative output
voltages)