Practice Analog Electronic Circuits (79.1) - Differential Amplifier : Analysis and Numerical Examples (Contd.)

Practice: Analog Electronic Circuits

Lesson 79.1Differential Amplifier : Analysis and Numerical Examples (Contd.)

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10 questions

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6 sample questions

Question 1.
What is the main function of a differential amplifier?
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Think about what it does with two input voltages.
Question 2.
Define common mode gain.
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Consider what happens when both signals are identical.
3Question 3.
What is the primary function of a differential amplifier?
- To amplify single input
- To amplify the difference between two inputs
- To isolate input signals
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Consider what defines 'differential' in the context.
4Question 4.
True or False: The common mode gain is typically higher than the differential mode gain.
- True
- False
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Think about the purpose of each gain type.
Question 5.
Calculate the maximum output swing of a BJT differential amplifier with a supply voltage of 12V, a collector current of 1 mA, and a base voltage of 2.6V.
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Account for the drop across the collector resistor too.
Question 6.
Discuss reasons why replacing the tail resistor with an active device could improve amplifier performance.
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Consider how active devices stabilize operating points.

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