Practice The Π-model (hybrid-π Model) (3.2.1) - Small-Signal Analysis and Frequency Response of Amplifiers (Low Frequency)
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The π-Model (Hybrid-π Model)

Practice - The π-Model (Hybrid-π Model)

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does the π-model help illustrate?

💡 Hint: Think about circuit analysis.

Question 2 Easy

Calculate the transconductance (g_m) for I_C = 1 mA and V_T = 25 mV.

💡 Hint: Use the formula g_m = I_C / V_T.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does the π-model represent in small-signal analysis?

A. AC and DC analysis
B. Only DC analysis
C. Small-signal behavior of BJTs
D. Only low-frequency analysis

💡 Hint: Think about what type of analysis involves more complex circuits.

Question 2

True or false: The input resistance r_π affects how much current the signal source provides to the amplifier.

True
False

💡 Hint: Consider the definitions of input resistance.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design a small-signal model for a BJT with I_C = 1.5 mA, β = 150, and V_A = 100V. Calculate g_m, r_π, and r_o.

💡 Hint: Use g_m = I_C / V_T for transconductance and other formulas for resistance.

Challenge 2 Hard

How would the voltage gain change if the input resistance increased while keeping all other parameters constant? Discuss implications.

💡 Hint: Consider what roles resistances play in your basic amplifier equations.

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Reference links

Supplementary resources to enhance your learning experience.