Practice Small Signal Analysis Of Common Source Amplifier (67.6) - Multi-Transistor Amplifiers : Amplifier With Active Load (Part B)

Practice: Small Signal Analysis of Common Source Amplifier

Lesson 67.6Multi-Transistor Amplifiers : Amplifier With Active Load (Part B)

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9 questions

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6 sample questions

Question 1.
What is the purpose of using an active load in a common source amplifier?
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Consider how active components differ from passive ones.
Question 2.
Define voltage gain in the context of amplifiers.
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Think about the relation between input and output signals.
3Question 3.
What is the primary reason to use an active load in a common source amplifier?
- To increase voltage gain
- To decrease output resistance
- To simplify design
- To use less power
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Consider the main function of an amplifier.
4Question 4.
True or False: In a common source amplifier, both MOSFETs must operate in saturation for proper gain.
- True
- False
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Think about the operating regions of a MOSFET.
Question 5.
Given the following parameters of a common source amplifier: $g_m = 3 mS$ , $r_{ds1} = 2 k\Omega$ , and $r_{ds2} = 4 k\Omega$ . Calculate the voltage gain and explain if the active load indeed increases the gain.
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Use the rules for parallel resistances to calculate equivalent resistance.
Question 6.
Compare the impact of load line slopes on gain when switching from passive to active loading in a common source amplifier setup, offering numerical examples.
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Highlight you can compare directly by evaluating the slope characteristics.

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