Example 2 For the RC-coupled transistor amplifiers of Fig.4. a) Calculate the no-load voltage gain and output voltage. b) Calculate the overall gain and output voltage if a 4.7 k2 load is applied to the second stage and compare to the results of part (a). c) Calculate the input impedance of the first stage and the output impedance of the second stage. +20 V 2.2 k2 Cc 15 k2 2.2 k2 15 k2 10 uF 10 uF V,- 25 µVo ) B=200 B= 200 10 uF 4.7 k2 4.7 ka 20uF I K2 20µF Fig. 4

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Author:Robert L. Boylestad
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Multistage Amplifier Analysis (Cascaded Systems)
Example 2
For the RC-coupled transistor amplifiers of Fig.4.
a) Calculate the no-load voltage gain and output voltage.
b) Calculate the overall gain and output voltage if a 4.7 kN load is applied to the second stage,
and compare to the results of part (a).
c) Calculate the input impedance of the first stage and the output impedance of the second stage.
+20 V
to
2.2 k2
15 ks2
2.2 kf2
15 k2
10 uF
10 uF
V,= 25 µVo
B=200
B = 200
10 µF
4.7 k2
4.7 k2
I k2
20µF
I k2
20uF
Fig. 4
Transcribed Image Text:Multistage Amplifier Analysis (Cascaded Systems) Example 2 For the RC-coupled transistor amplifiers of Fig.4. a) Calculate the no-load voltage gain and output voltage. b) Calculate the overall gain and output voltage if a 4.7 kN load is applied to the second stage, and compare to the results of part (a). c) Calculate the input impedance of the first stage and the output impedance of the second stage. +20 V to 2.2 k2 15 ks2 2.2 kf2 15 k2 10 uF 10 uF V,= 25 µVo B=200 B = 200 10 µF 4.7 k2 4.7 k2 I k2 20µF I k2 20uF Fig. 4
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