Exp.5_Feedback effect study

Apparatus required: Signal generator, CRO, connecting leads, CRO probes and CE amplifier kit.
Apparatus required: Signal generator, CRO, connecting leads, CRO probes and CE amplifier kit.

Observations:
Without feedback (Vin_p-p = 100 mV)
Frequency
Vout_p-p
Gain (Vout_p-p/ Vin_p-p)

1kHz
0.93332
93.332

10kHz
0.93175
93.175

100kHz
0.93132
93.132

1MHz
0.92742
92.742

10MHz
0.65594
65.594

100MHz
0.116013
1.16013


With feedback (Vin_p-p = 100 mV)

Frequency
Vout_p-p
Gain (Vout_p-p/ Vin_p-p)

1kHz
1.58249
15.8251

10kHz
10.2058
102.058

100kHz
10.9614
109.614


1MHz
10.8909
108.909

10MHz
10.2453
102.453

100MHz
1.64315
16.4315

Conclusion:
The gain and frequency response of CE-BJT amplifier is low with feedback in compared to the without feedback gain. And bandwidth is more without feedback we also see that there is a sudden hike in gain when we close the feedback switch.