A BJT cascode amplifier with a cascode active load is shown inFigure P10.89. Assume transistor parameters of
The small-signal voltage gain
Answer to Problem 10.89P
Explanation of Solution
Given:
Calculation:
The given circuit is,
The equivalent circuit for active load amplifier is as shown,
The expression for input voltage
Now expression for output resistance is,
Put equation (3) in equation (2)
Consider
Now expression for hybrid resistor parameter.
Now output voltage will be,
Consider
Put value from equation (8) to equation (6)
Put
Now
Substitute the value for
Now
Substitute the derived values in equation (10)
Conclusion:
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Chapter 10 Solutions
Microelectronics: Circuit Analysis and Design
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