
(a)
The small signal parameters for each of the transistor and the value of the composite transconductance for the given specifications.
(a)

Answer to Problem 11.80P
The value of the small signal parameters are
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
Calculation:
The expression to determine the value of the emitter current of the second transistor is calculated as,
The expression to determine the value of the current
Substitute
The value of the transconductance
The expression to determine the value of the small signal resistance is given by,
Substitute
The value of the drain current
The value of the transconductance
Substitute
The expression to determine the value of the composite transconductance is given by,
Substitute
Conclusion:
Therefore, the value of the small signal parameters are
(b)
The small signal parameters for each of the transistor and the value of the composite transconductance for the given specifications.
(b)

Answer to Problem 11.80P
The value of the small signal parameters are
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
Calculation:
The expression to determine the value of the emitter current of the second transistor is calculated as,
The expression to determine the value of the current
Substitute
The value of the transconductance
The expression to determine the value of the small signal resistance is given by,
Substitute
The value of the drain current
The value of the transconductance
Substitute
The expression to determine the value of the composite transconductance is given by,
Substitute
Conclusion:
Therefore, the value of the small signal parameters are
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Chapter 11 Solutions
Microelectronics: Circuit Analysis and Design
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