Practice Differential Amplifier Using Bjt (85.2) - Usage of current mirror (Part-C)

Practice: Differential Amplifier using BJT

Lesson 85.2Usage of current mirror (Part-C)

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9 questions

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6 sample questions

Question 1.
What is the main purpose of a differential amplifier?
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Think about why we need to amplify a difference.
Question 2.
Define a current mirror.
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It helps in biasing circuits.
3Question 3.
What is the role of a current mirror in a differential amplifier?
- To amplify voltage
- To replicate current
- To stabilize temperature
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Think about what 'mirror' implies.
4Question 4.
True or False: A differential amplifier can amplify both common-mode and differential signals equally.
- True
- False
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Recall the definitions of common-mode and differential signals.
Question 5.
Design a BJT differential amplifier with specified input and output impedances. Calculate the necessary resistor values for a desired gain of 100.
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Make sure to consider how resistances affect gain and impedance.
Question 6.
If given a common-mode gain of 10 and a differential gain of 100, calculate the common-mode rejection ratio (CMRR).
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Remember the formula for CMRR and apply it directly.

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