1. AMPLIFIERS
Presenter :王智偉
Advisor : Chih-Kuo Liang

2. Outline NONINVERTING SUMMING AMPLIFIER AC-COUPLED AMPLIFIER
CURRENT AMPLIFIER
HIGH-CURRENT AMPLIFIER

3. NONINVERTING SUMMING AMPLIFIER
Numerical Analysis
Voltage Gain RI RF
Rin
Rout
AOL VI VO
2.7kΩ
3.9kΩ
(2.28)
=3.9k/2.7k +1
3.25v
=2.44

4. NONINVERTING SUMMING AMPLIFIER
Output Voltage
(2.1)
=2.44*3.25 V
=7.93 V

5. AC-COUPLED AMPLIFIER Voltage Gain - + (2.37) Rf 68k CI RI VI Co 27k
0.02uF +
0.02uF
39kΩ RL

6. AC-COUPLED AMPLIFIER
Xc=1/(62.8*800 Hz*0.02uF)
=9.95kΩ
=28.8kΩ

7. AC-COUPLED AMPLIFIER Bandwidth =(1 MHz*27 kΩ)/(68 kΩ+27 kΩ)
(2.37)
(2.40)
=(1 MHz*27 kΩ)/(68 kΩ+27 kΩ)
=-(68 kΩ/28.80kΩ)
=-2.4
=284 kHz

8. AC-COUPLED AMPLIFIER =295 Hz/204 Hz =1/(6.28*27 kΩ*0.02 uF) =295 Hz
(2.41)
(2.42)
=295 Hz/204 Hz
=1/(6.28*27 kΩ*0.02 uF)
=295 Hz
=1.45

9. AC-COUPLED AMPLIFIER =295 Hz*1.32 =284 kHz-389 kHz =389 Hz =283.6 kHz
(2.43)
=295 Hz*1.32
=284 kHz-389 kHz
=389 Hz
=283.6 kHz

10. CURRENT AMPLIFIER Numerical Analysis - =56 kΩ/1 kΩ+1 + =57
Current Gain I1 R1
1 kΩ IL R2
56 kΩ RL
3 kΩ
(2.45) I1 -
=56 kΩ/1 kΩ+1 +
=57
10~50uF

11. CURRENT AMPLIFIER
=50 uA*57
=10 uA*57
=570uA
=2.85 mA

12. CURRENT AMPLIFIER Numerical Analysis
Range of Acceptable Input Currents
(2.46)
=(1 kΩ*13 V)/〔1 kΩ(56 kΩ+3 kΩ)+(56 kΩ*3 kΩ)〕
=57.3 uA

13. CURRENT AMPLIFIER Numerical Analysis =13 V/(57*50 uA)-56 kΩ/57
Maximum Load Resistance
=13 V/(57*50 uA)-56 kΩ/57
=3.58 kΩ

14. CURRENT AMPLIFIER
Numerical Analysis
Input Resistance
(2.47)

15. CURRENT AMPLIFIER =(1.0 kΩ*56 kΩ)/(1.0 kΩ+56 kΩ)
(2.47)
=(1.0 kΩ*56 kΩ)/(1.0 kΩ+56 kΩ)
=〔56 kΩ(982 Ω+3 kΩ)〕/〔982 Ω( )+3 kΩ〕
=982 Ω
=4.54 Ω

16. CURRENT AMPLIFIER Numerical Analysis =50000*982 Ω =49.1 MΩ
Output Resistance
(2.48)
=50000*982 Ω
=49.1 MΩ

17. HIGH-CURRENT AMPLIFIER
Numerical Analysis
+15V RF
220kΩ
22uF
27kΩ -
(2.49)
(MJE1103) CI RI +
=750*4 Vo VI RB
22kΩ
=3000 Ω RL 4Ω RP
+ V
5kΩ

18. HIGH-CURRENT AMPLIFIER
(2.50)
=10 V-2.5 V
=7.5 V/4 Ω
=7.5 V
=1.88 A

19. HIGH-CURRENT AMPLIFIER
(2.51)
=1.88 A/750
=2.51 mA

20. HIGH-CURRENT AMPLIFIER
(2.52)
=(10 V+2.5 V)/2
=6.25 V
=10 V-2.5 V
=7.5 V peak-to-peak

21. HIGH-CURRENT AMPLIFIER

22. HIGH-CURRENT AMPLIFIER
(2.6)
=-(220 kΩ/27 kΩ)
=-8.15

23. HIGH-CURRENT AMPLIFIER
(2.1)
=7.5/8.15
=0.92 V peak-to-peak

24. Thanks for your attention