Op amps - Harjutus 5 (1)

Tallinn University of Technology
Department of Electrical Drives and Power Electronics

Report on Exercises 5
On Electronics and Semiconductor Engineering
Op amps

AAVB-41

Tallinn
2008
Exercise 5.1. Non-Inverting Voltage Amplifier
Uin = 0,7 V
f = 300 Hz
Fig. 5.2. Diagrams of bandwidth versus gain
Data table
Uin,V
R2,kΩ
R1,kΩ
Measured
Calculated
K
Uout,V
fc,kHz
K
Uout,V
fc,kHz
1
90
50
2,80
1,98
530,31
2,8
1,96
535,71
1
90
40
3,25
2,30
457,55
3,25
2,28
461,54
1
90
30
4,00
2,83
372,40
4
2,80
375,00
1
90
20
5,50
3,89
271,37
5,5
3,85
272,73
1
90
10
10,00
7,07
149,63
10
7,00
150,00
1
90
5
19,01
13,44
78,86
19
13,30
78,95
1
90
2
24,81
17,54
32,59
46
32,20
32,61
Calculation
where fu=1, 5MHz – the unity gain bandwidth taken from Multisim op amp model.
Conclusion
Calculated and experimental results are very similar while the output is less than the op amp voltage swing. To obtain the higher output voltage, the op amp voltage swing must be increased.