Practice Common Mode Rejection Enhancement (85.2.5) - Usage of current mirror (Part-C)

Practice: Common Mode Rejection Enhancement

Lesson 85.2.5Usage of current mirror (Part-C)

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8 questions

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6 sample questions

Question 1.
Define common mode gain.
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Think about signals that affect both sides of the amplifier equally.
Question 2.
What is a current mirror?
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It 'mirrors' current.
3Question 3.
What is the main function of a current mirror in amplifier circuits?
- To amplify the signal
- To maintain a consistent current
- To reduce signal distortion
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Focus on what is meant by 'mirroring'.
4Question 4.
True or False: Increasing common mode gain is beneficial for amplifier performance.
- True
- False
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Recall the relationship between input signals.
Question 5.
Given a differential amplifier with a low common mode gain and its transconductance specified, design a similar circuit with a current mirror. Identify potential challenges.
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Refer back to the current mirroring effects discussed.
Question 6.
Assume a circuit yields incorrect biasing due to high common mode gain. Redesign it using calculations for ideal current mirror values.
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Use known relationships to recalculate.

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