Consider the circuit shown in Figure P7.32. The transistor parameters are
Figure P7.32
(a)
The value of
Answer to Problem 7.32P
The value of collector resistor,
Explanation of Solution
Given:
The given circuit is shown below.
Calculation:
From figure, the value of emitter current is,
The value of base current is,
Substitute
The value of collector current is,
Substitute
The value of emitter voltage is,
Substitute
The value of collector voltage is,
Substitute
The value of collector resistor is,
Substitute 3 V for
(b)
The mid band gain
Answer to Problem 7.32P
The value of mid-band gain
Explanation of Solution
Given:
The given circuit is shown below.
Calculation:
Draw the small signal equivalent circuit of figure to derive expression for mid band gain.
Apply voltage division rule to calculate the voltage across the base input resistor associated withthe input portion of the circuit.
Apply Kirchhoff's current law at output node in Figure 1
Substitute
The value of base input resistance.
Substitute
The value of transconductance is,
Substitute
The value of mid-band gain is,
Substitute
for
(c)
To derive: The expression for the corner frequencies associated with
Answer to Problem 7.32P
The expression for the corner frequency associated with
The expression for the corner frequency associated with
Explanation of Solution
Given:
The given circuit is shown below.
Calculation:
Derive the expression for the comer frequency associated with
Thus, the expression for the corner frequency associated with
Derive the expression for the comer frequency associated with
Thus, the expression for the corner frequency associated with
(d)
The value of
Answer to Problem 7.32P
The value of capacitance,
The value of capacitance,
Explanation of Solution
Given:
The given circuit is shown below.
Calculation:
Determine the value of capacitance,
Substitute
Thus, the value of capacitance,
Determine the value of capacitance,
Substitute
Thus, the value of capacitance,
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Chapter 7 Solutions
Microelectronics: Circuit Analysis and Design
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