To show: The variation in magnitude of the input resistance
To explain: The influence of
Answer to Problem 12.9TYU
The influence of
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
Feedback resistor value is varied between
Calculation:
Mark the nodes and redraw the circuit.
The given diagram is shown in Figure 2
Figure 2
Mark the values and draw the PSpice circuit for the above circuit.
The required circuit is shown in Figure 3
Figure 3
The snip for the drop box of the internal parameters of the transistor is shown in Figure 4
Figure 4
The simulation settings to estimate the magnitude of the current gain as the value of
Figure 5
Then left click on the trace option then select add trace and type “ABS(V(vi)l(li))” then command in the trace magnitude of the resistance
Figure 6
By KCL the expression for the current
The expression for the node voltage is given by,
Apply KCL at node
Substitute
Consider
The expression for the output current is given by,
Substitute
Substitute
Conclusion:
Therefore, the influence of
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Chapter 12 Solutions
Microelectronics: Circuit Analysis and Design
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