Discuss at least three very important characteristic of differential amplifiers.

Differential Amplifiers

INTRODUCTION

Discuss at least three very important characteristic of differential amplifiers.

What do the terms inverting and non-inverting mean in the context of amplifiers?

Calculate the ideal IT, IE, Vc for the differential amplifier shown in the diagram. Repeat the calculations using the second approximation. Show all work and record the final answers in the table.

EQUIPMENT

  • <List of devices and meters that are used.>

PROCEDURE

Build the circuit in Multisim and measure IT, IE, Vc , record them in the table.

<Steps you took to carry out the lab.>

RESULTS

  IT IE VC
Ideal      
2nd

approx.

     
Measured      

Compare calculations with the measured values.

What did you discover/confirm?

Include screen shots of the meter readings.

The table below shows readings for three different cases where the circuit above, was malfunctioning. Find the fault, assuming only one device in each case has a problem. List the steps taken to arrive at a solution.

  IC IE VC What is the problem?
Case 1

Q1

Q2

 

4.87mA

4.61mA

 

4.89mA

4.64mA

 

15V

10.4V

 
Case 2

Q1

Q2

 

7.49mA

0

 

7.53mA

1.99mA

 

7.51V

-695mV

 
Case 3

Q1

Q2

 

15pA

9.46mA

 

0

9.52mA

 

15V

5.54V

 

CONCLUSION

What did you learn?

 

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