Practice Output Impedance Calculation (47.3.6) - Common Collector and Common Drain Amplifiers (Contd.): Numerical Examples (Part A)

Practice: Output Impedance Calculation

Lesson 47.3.6Common Collector and Common Drain Amplifiers (Contd.): Numerical Examples (Part A)

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8 questions

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6 sample questions

Question 1.
What is output impedance?
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Think about what 'impedance' means in a circuit context.
Question 2.
Name one small signal parameter.
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It’s related to the current flowing in the transistor.
3Question 3.
What is the formula for calculating output impedance?
- R_out = R_load + small signal parameters
- Z_out = 1 / (g_m + g_o)
- Z_out = R_load + R_bias
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Think about how output and small signal parameters relate.
4Question 4.
True or False: Lower output impedance is always better for amplifier performance.
- True
- False
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Consider what happens when the impedance is high.
Question 5.
Given a common collector amplifier with a collector current of 0.75 mA, calculate the output impedance if the small signal parameters g_m = 40 mS and r_o = 200 kΩ.
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Substitute the values carefully into the formula.
Question 6.
Consider a scenario where a load resistance of 1kΩ is connected. If the output impedance calculated is 52Ω, what is the effect of this load on the output voltage?
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Think about voltage division principles and how impedance interacts.

4 more questions in this section. Enroll free to practise them all.