Electronics II and Lab

 

Power Amplifiers

 

INTRODUCTION

 

Discuss some of the basic differences between the operation of a class A, B and C amplifiers.

 

EQUIPMENT

 

• 1 power supply: 12V
• 1 transistor: 2N3904
• 2 resistors: 1kΩ, 50kΩ
• 3 capacitors: 0.1µF, 0.01µF, 560pF
• 1 inductor: 38.07µH
• Tektronix oscilloscope
• Waveform generator

 

PROCEDURE

 

Using Multisim construct the circuit shown below:

 

Diagram posted as attachment

 

 

 

 

 

 

 

Calculate the resonant frequency f_r – show your work and record the answer in row 1 of the table.

 

1. Use the Waveform generator to produce an input: 2.5Vpk and frequency set to the resonant frequency.
2. Use the Tektronix oscilloscope to measuref_outand record it in the table
3. Take a screen shot of circuit showing the frequency measurement on the oscilloscope.
4. Repeat steps a) and c) for each input frequency in the table.

 

RESULTS

 

fin	fout
1	fr =
2	1500kHz
3	300kHz
4	546kHz
5	273kHz
6	873kHz

 

Discuss the results.

 

CONCLUSION

 

What is the function of this circuit?

 

What did you learn?

 

Please fill out and use the following Lab Report Template when submitting your lab work.