Concept explainers
(a)
The value of minimum value of
(a)
Answer to Problem 8.1EP
The value of resistance for which the Q point in within the safe area is
Explanation of Solution
Calculation:
The expression for the collector to the emitter load line is given by,
The expression for the power transistor is given by,
The expression for the value of current at which the maximum power is obtained is obtained by differentiating the above equation with respect to zero and is given by,
The expression for the voltage at the maximum power point is,
Substitute
The expression for the maximum power dissipation in the circuit is given by,
Substitute
It is given that
Substitute
The expression for the maximum collector current is given by,
Substitute
The expression for the maximum power dissipation is given by,
Subsume
Conclusion:
Therefore, the value of resistance for which the Q point in within the safe area is
(b)
The value of minimum value of
(b)
Answer to Problem 8.1EP
The value of resistance for which the Q point in within the safe area is
Explanation of Solution
Calculation:
The expression for the maximum collector current is given by,
It is given that
Substitute
The value of the maximum collector current is given by,
Substitute
The expression for the maximum power dissipation in the transistor is given by,
Substitute
Conclusion:
Therefore, the value of resistance for which the Q point in within the safe area is
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Chapter 8 Solutions
Microelectronics: Circuit Analysis and Design
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