Practice Department Of Electronics And Electrical Communication Engineering (23.2.2)

Practice: Department of Electronics and Electrical Communication Engineering

Lesson 23.2.2Linear models of Amplifiers (Part B)

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6 sample questions

Question 1.
What is a current amplifier?
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Consider the type of signals managed by the amplifier.
Question 2.
What does unloaded current gain indicate?
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Think about testing an amplifier with no devices connected.
3Question 3.
What does an unloaded current gain of 5 mean?
- The output current is five times the input current
- The input current is five times the output current
- It has no significance
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Think about how gain changes the input and output relation.
4Question 4.
True or False: A current amplifier can also amplify voltage.
- True
- False
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Remember, each amplifier type serves a specific purpose.
Question 5.
Design and describe a circuit featuring both a current amplifier and a transimpedance amplifier. Explain how the output of the first amplifier drives the second.
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Remember the signal flow from current to voltage!
Question 6.
A current amplifier has an internal resistance of 150 ohms and is connected to a load of 450 ohms. What is the effective current gain considering loading effects?
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Consider resistance in parallel and the impact on current transfer.

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