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-BoardMake sure there is visible wire at the terminals, so that the terminals are not clamping down on the wire insulation

Vout

R1

R5

R4

R3

R2

12

3

4 5

6

8

7

C2

C1

R7

R6

At this end there will be a cut-outand/or a dot next

to pin 1

-15V ground

+15V

ground

Vin

Photo #2 An example circuit layoutof figure 5 on

page 4 of the lab

Vin

Photo #3 - Vin Connections from the HP DC Power Supply

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)