Practice Small Signal Parameters And Voltage Gain Calculation (58.1.6) - Multi-Transistor Amplifiers (Contd.): Numerical Examples (Part A)

Practice: Small Signal Parameters and Voltage Gain Calculation

Lesson 58.1.6Multi-Transistor Amplifiers (Contd.): Numerical Examples (Part A)

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6 sample questions

Question 1.
What is the formula for calculating transconductance (g_m)?
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Recall the relationship between collector current and the thermal voltage.
Question 2.
Define the term 'Operating Point.'
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Think about when a transistor works efficiently in an amplifier.
3Question 3.
What does transconductance (g_m) indicate?
- Control of output current by input voltage
- Resistance in the output
- Frequency response of the circuit
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In your understanding, think of g_m as reflecting the sensitivity of the amplifier.
4Question 4.
True or False: A common collector stage always increases the voltage gain.
- True
- False
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Evaluate the role of the CC stage in overall configurations.
Question 5.
Given a CE amplifier with an input current of 20 μA and a beta of 150, calculate the collector current I_C and verify its effect on transconductance g_m for an assumed V_T of 26 mV.
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Use the relationship between beta and collector current.
Question 6.
Design a multi-stage amplifier using both CE and CC configurations, and explain the effect of each configuration on gain and bandwidth in a summary report.
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Focus on the interactive role of both configurations in the cascading design.

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