Concept explainers
Consider the differential amplifier circuit in Figure 17.1 biased at
(a)
The design parameters of the circuit for the given values.
Answer to Problem 17.1EP
The value of the resistances to design the circuit are for
Explanation of Solution
Calculation:
The given circuit is shown in Figure 1.
The expression for the voltage at the emitter terminals is given by,
Substitute
The expression to determine the value of the current
Substitute
The expression to determine the value of the collector current of the first transistor is given by,
Substitute
The expression for the value of the collector current of the second transistor is given by,
Substitute
The expression for the value of the voltage
Substitute
Conclusion:
Therefore, the value of the resistances to design the circuit are for
(b)
The value of the current
Answer to Problem 17.1EP
The value of the current and the voltage for the value of the input voltage of
Explanation of Solution
Calculation:
The expression for the voltage at the emitter terminals is given by,
Substitute
The expression to determine the value of the current
Substitute
The expression to determine the value of the collector current of the first transistor is given by,
Substitute
The expression for the value of the collector current of the second transistor is given by,
The expression for the value of the voltage
Substitute
The expression for the value of the voltage
Substitute
The expression for the voltage at the emitter terminals is given by,
Substitute
The expression to determine the value of the current
Substitute
The expression to determine the value of the collector current of the first transistor is given by,
The expression for the value of the collector current of the second transistor is given by,
Substitute
The expression for the value of the voltage
Substitute
The expression for the value of the voltage
Substitute
Conclusion:
Therefore, the value of the current and the voltage for the value of the input voltage of
(c)
The value of the power dissipated in the circuit for the different value of the input voltage.
Answer to Problem 17.1EP
The value of the power consumed in the circuit for the input voltage of
Explanation of Solution
Calculation:
The expression for the value of the power dissipated in the circuit.
Substitute
Substitute
Conclusion:
Therefore, the value of the power consumed in the circuit for the input voltage of
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Chapter 17 Solutions
Microelectronics: Circuit Analysis and Design
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