Lab Worksheet: Summing Amplifier (Inverting and Non-Inverting) and Instrumentation Amplifier

Laboratory Report Cover/Worksheet
DeVry University
College of Engineering and Information Sciences

Course Number: ECET220
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Laboratory Title: Summing Amplifier (Inverting and Non-Inverting) and Instrumentation Amplifier

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Objectives:

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Observations/Measurements:

IV. A. 2. DMM measurements of the summing amplifier (inverting): Voltage between pin 4 and ground =
Voltage between pin 11 and ground =
Table 1

IV. A. 3. Record DMM measurements for the following voltages with respect to ground:

Node Voltages
Theoretical Values
Measured Values
VA
1 VDC

VB
1 VDC

VC
1 VDC

Table 2

IV. A. 4. Calculated and measured values of VOUT:
VOUT (calculated) =
VOUT (measured) =
VOUT-MEASURED – VOUT-CALCULATED =
Table 3
IV. A. 5. Record DMM measurements for the following voltages with respect to ground:
Node Voltages
Theoretical Values
Measured Values
VA
-1 VDC

VB
-1 VDC

VC
-1 VDC

Table 4
IV. A. 6. Calculated and measured values of VOUT:
VOUT (calculated) =
VOUT (measured) =
VOUT-MEASURED – VOUT-CALCULATED =
Table 5

IV. A. 7. Record DMM measurements for the following voltages with respect to ground:
Node Voltages
Theoretical Values
Measured Values
VA
-1 VDC

VB
+2 VDC

VC
+3 VDC

Table 6
IV. A. 8. Calculated and measured values of VOUT:
VOUT (calculated) =
VOUT (measured) =
VOUT-MEASURED – VOUT-CALCULATED =
Table 7
IV. A. 9. Answer the following questions:
The Theoretical value closely predicts the actual circuit output. (True / False) _________
Which input has the highest voltage gain? __________
a) VA
b) VB
c) VC
d) All have the same voltage gain
Which input has the lowest voltage gain? __________.
a) VA
b) VB
c) VC
d) All have the same voltage gain
If R1 = R2 = R3 = R4, write the equation for VOUT.
VOUT =

If R1 = R2 = R3 = 3 x R4, write the equation for VOUT.