Practice Small Signal Model Analysis (83.4) - Usage of current mirror (Part-A)

Practice: Small Signal Model Analysis

Lesson 83.4Usage of current mirror (Part-A)

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8 questions

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6 sample questions

Question 1.
What is the primary function of a current mirror?
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Think about current redundancy in circuits.
Question 2.
Name one type of transistor used in current mirrors.
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Consider common transistor types.
3Question 3.
What does a current mirror do?
- Provides different currents
- Mirrors output to match reference current
- Only works under DC conditions
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Consider what a mirror does!
4Question 4.
Is the small signal model applicable under AC signal conditions?
- True
- False
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Think about small variations.
Question 5.
Design a current mirror circuit using two BJTs to ensure that the collector currents match precisely within 5%. Explain how you would achieve this.
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Think about how temperature affects junction conductivity.
Question 6.
Calculate the small signal output given a reference current of 1 mA and a transconductance of 10 mS in a MOSFET current mirror. What is the expected output current under a small AC signal?
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Use Ohm's and Kirchhoff's laws to analyze the circuit.

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