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Question 5.21: For the network of Fig. 5.115 , determine: a. Z i . b. Z o ....

For the network of Fig. 5.115 , determine:
a. Z_i .
b. Z_o .
c. A_{v} .
d. A_i .

5.115
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a. Z_{i}=R_{E}\left\|h_{i b}=2.2 k \Omega\right\| 14.3 \Omega= 1 4 . 2 1 \Omega \cong h_{i b}

 

b. r_{o}=\frac{1}{h_{o b}}=\frac{1}{0.5 \mu A / V }=2 M \Omega

 

Z_{o}=\frac{1}{h_{o b}} \| R_{C} \cong R_{C}=3.3 k \Omega

 

c. A_{v}=-\frac{h_{f b} R_{C}}{h_{i b}}=-\frac{(-0.99)(3.3 k \Omega)}{14.21}= 2 2 9 . 9 1

 

d.  A_{i} \cong h_{f b}=- 1

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