To derive: The expression for the loop gain.
Answer to Problem 12.69P
The expression for the loop gain is
Explanation of Solution
Given:
The given circuit is shown in Figure 1
Figure 1
Calculation:
The small signal equivalent diagram for the Figure is shown in Figure 2
Figure 2
Apply KCL at node
Apply KCL at node
The expression for the voltage
Apply KCL at node
Substitute
Apply KCL at node
Substitute
Substitute
Substitute
Substitute
Substitute
Conclusion:
Therefore, the expression for the loop gain is
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Chapter 12 Solutions
Microelectronics: Circuit Analysis and Design
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