Concept explainers
Consider the multistage bipolar circuit in Figure P 11.90, in which de base currents are negligible. Assume the transistor parameters are
(a)
The design parameters for the circuit.
Answer to Problem 11.90P
The value of the resistances to design the circuit is
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
The given values are
Calculation:
The collector for both the transistors are equal and is given by,
The expression for the voltage
Substitute
The value of the voltage
The value of the resistance
The value of the resistance
The value of the resistance
Conclusion:
Therefore, the value of the resistances to design the circuit is
(b)
The value of the differential mode voltage gain
Answer to Problem 11.90P
The value of the differential voltage gain is
Explanation of Solution
The given diagram is shown in Figure 1
Figure 1
Calculation:
The expression for the gain
The value of the gain
The value of the resistance
The value of the gain
The value of the gain
The value of the voltage gain
Substitute
Conclusion:
Therefore, the value of the differential voltage gain is
(c)
The value of
Answer to Problem 11.90P
The values of the gain are
Explanation of Solution
The given diagram is shown in Figure 1
Figure 1
Calculation:
The value of the voltage
The value of the common mode voltage
Solve further as,
The value of the common mode rejection ration is calculated as,
Conclusion:
Therefore, the values of the gain are
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Chapter 11 Solutions
Microelectronics: Circuit Analysis and Design
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