89.2.4 - Common Mode Gain Calculation
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Practice Questions
Test your understanding with targeted questions
Define common mode gain in the context of differential amplifiers.
💡 Hint: Think about what happens to signals that are identical at both inputs.
What is the role of a current mirror in a differential amplifier?
💡 Hint: Consider the function of copying currents in the circuit.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the common mode gain of a differential amplifier designed for high performance?
💡 Hint: Reflect on the purpose of differential amplifiers.
True or False: The current mirror helps to equalize the quiescent currents in a differential amplifier.
💡 Hint: Remember the role of current mirrors in circuit performance.
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Challenge Problems
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Design a differential amplifier with a current mirror that maintains a differential mode gain of 300 while ensuring the common mode gain remains below 0.1. Calculate the needed parameters.
💡 Hint: Consider how varying the values affects both gains.
Given a common mode voltage applied to a differential amplifier, analyze how the current mirror's performance gets affected and quantify any changes in output voltage.
💡 Hint: Focus on the characteristics of output voltage variation with common inputs.
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