Concept explainers
(a)
Find current through
(a)
Answer to Problem 59E
The current through
Explanation of Solution
Given data:
Value of trans-conductance
Value of voltage supply
Calculation:
The redrawn circuit is shown in Figure 1.
Refer to the Figure 1.
The expression for voltage division across resistance
Here,
The expression for current division rule across resistance
Here,
Substitute
Solve for
Substitute
Solve for
Conclusion:
Thus, the current across the
(b)
Find the amplifier output voltage
(b)
Answer to Problem 59E
The amplifier output voltage
Explanation of Solution
Calculation:
Refer to the Figure 1.
The expression for ohm’s law across resistance
Here,
Refer to the Figure 1.
Substitute
Conclusion:
Thus, the amplifier output voltage in the circuit is
(c)
Check whether the circuit can amplify the signal.
(c)
Answer to Problem 59E
The amplified output voltage can’t amplify the input signal because
Explanation of Solution
Refer to Figure 1
The amplified output voltage
For the amplification, the desired condition must satisfy which is
Conclusion:
Thus, the amplified output voltage can’t amplify the input signal because
(d)
Check whether the circuit can amplify the signal for input voltage
(d)
Answer to Problem 59E
The circuit can amplify the input signal because it satisfies the condition
Explanation of Solution
Refer to Figure 1
The amplified output voltage
For the amplification, the desired condition must satisfy which is
Conclusion:
Thus, circuit can amplify the input signal because it satisfies the condition
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Chapter 3 Solutions
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