Practice Current Mirror Characteristics And Applications (82.3.2) - Current mirror circuits (Part-B)

Practice: Current Mirror Characteristics and Applications

Lesson 82.3.2Current mirror circuits (Part-B)

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9 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a current mirror?
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Think about how mirrors reflect images.
Question 2.
Why is high output resistance important?
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Stability is key in circuit design.
3Question 3.
What is the primary purpose of a current mirror?
- To amplify voltage
- To maintain constant current
- To switch signals
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Reflect on how mirrors operate.
4Question 4.
True or False: A Beta-helper circuit decreases the accuracy of a current mirror.
- True
- False
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Consider the helping effect of the Beta-helper.
Question 5.
Design a current mirror circuit that includes both a cascode structure and Beta-helper. Discuss the advantages in terms of output resistance and accuracy.
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Focus on stability and reliability when discussing advantages.
Question 6.
Calculate the output current for a BJT current mirror with a reference current of 100 μA and a β value of 100, including any voltage drops across V_BE.
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Utilize the fundamental relationships of the currents flowing through the base and emitter.

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