Practice Analog Electronic Circuits (77.1) - Differential Amplifier : Analysis and Numerical Examples

Practice: Analog Electronic Circuits

Lesson 77.1Differential Amplifier : Analysis and Numerical Examples

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8 questions

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6 sample questions

Question 1.
Define differential mode operation.
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Consider what happens to both input signals in this mode.
Question 2.
What is the purpose of small signal analysis?
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Think about how this technique helps in calculations.
3Question 3.
What is the purpose of a differential amplifier?
- To amplify a single signal
- To amplify the difference between two signals
- To reduce the amplitude of signals
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Think about what aspect of the signals is being measured.
4Question 4.
True or False: Common mode gain should be as high as possible in a differential amplifier.
- True
- False
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Reflect on the ideal characteristics of signal amplification.
Question 5.
A differential amplifier using BJTs has a transconductance of 30 mS and a load resistance of 1.5kΩ. What is its differential gain?
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Use the transconductance and load resistance to find the gain.
Question 6.
If a differential amplifier's common mode gain is measured at 2 V/V, while its differential gain is 50 V/V, calculate the Common Mode Rejection Ratio (CMRR).
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Recall the formula for CMRR to calculate the answer.

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