Basics of Amplifier Design

Impedance Matching Circuits for Amplifiers - Part I — Lesson 1

Impedance Matching Circuits for Amplifiers - Part II — Lesson 2

Amplifier Gain Stability - Part I — Lesson 3

Amplifier Gain Stability - Part II — Lesson 4

Gain Circles - Part I — Lesson 5

Gain Circles - Part II — Lesson 6

Noise Figure Circles - Part I — Lesson 7

Noise Figure Circles - Part II — Lesson 8

DC Bias — Lesson 9

Amplifier Classes and Frequency Compensation — Lesson 10

Linearity — Lesson 11

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Question 1 of 16

1. Question
What are the benefits of using signal flow graphs in microwave engineering? (Select the two correct answers)
- Simplifies the analysis of the device
- Provides a visual representation of the device
- Helps in determining the power gain
- Assists in calculating the frequency range
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Question 2 of 16

2. Question
What can Mason's rules help determine in a two-port network? (Select the two correct answers)
- Transmission coefficient
- Input reflection coefficient
- Power gain
- Frequency range
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Question 3 of 16

3. Question
What is the main purpose of matching in amplifier circuit design?
- To decrease noise
- To decrease output power
- To maximize power transfer
- To decrease bandwidth
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Question 4 of 16

4. Question
What is the unilateral case in amplifier design?
- It is when the circuit is unstable
- It is when the circuit has maximum power gain
- It is when the circuit has zero reverse transmission
- It is when the circuit has maximum bandwidth
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Question 5 of 16

5. Question
What are the conditions for a potentially unstable case? (Select the two correct answers)
- K > 1
- Delta < 1
- K < 1
- Delta > 1
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Question 6 of 16

6. Question
What are the limitations of the bilateral case in microwave integrated circuit design? (Select the two correct answers)
- It doesn't allow for maximum gain
- It doesn't offer much design flexibility
- It doesn't allow for simultaneous match
- It doesn't allow for variable input impedance
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Question 7 of 16

7. Question
What is the noise figure in amplifier design?
- The ratio of the signal-to-noise ratio (SNR) at the output to the SNR at the input
- The ratio of the signal-to-noise ratio (SNR) at the input to the SNR at the output
- The ratio of the signal power to the noise power
- The ratio of the noise power to the signal power
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Question 8 of 16

8. Question
What does the noise measure help in determining?
- The arrangement of elements in a cascade to achieve the highest noise figure
- The arrangement of elements in a cascade to achieve the lowest noise figure
- The arrangement of elements in a cascade to achieve the highest signal-to-noise ratio
- The arrangement of elements in a cascade to achieve the lowest signal-to-noise ratio
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Question 9 of 16

9. Question
What is an active bias circuit?
- A circuit that decreases the bias voltage
- A circuit that increases the bias voltage
- A circuit that produces a specific bias voltage regardless of circuit or temperature changes
- A circuit that changes the bias voltage with circuit or temperature changes
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Question 10 of 16

10. Question
What is the role of a DC bias network?
- It separates AC from DC
- It decreases the temperature
- It separates DC and RF
- It mixes DC and RF
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Question 11 of 16

11. Question
What are the characteristics of an active bias circuit? (Select the three correct answers)
- It produces a specific bias voltage
- It maintains the bias voltage regardless of circuit changes
- It maintains the bias voltage regardless of temperature changes
- It changes the bias voltage with circuit or temperature changes
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Question 12 of 16

12. Question
What is frequency compensation in the context of amplifier design?
- The process of adjusting the frequency of the amplifier
- The use of filters to maintain constant gain across different frequencies
- The process of reducing the frequency of the amplifier
- None of the above
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Question 13 of 16

13. Question
What type of amplifier is typically used in low noise amplifiers?
- Class A
- Class B
- Class AB
- Class C
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Question 14 of 16

14. Question
What are the characteristics of a Class B amplifier? (Select the two correct answers)
- Conducts for exactly 180 degrees
- Has higher power consumption than Class A
- Typically used in power amplifiers
- Conducts for the entire 360-degree phase variation
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Question 15 of 16

15. Question
What is intermodulation?
- Interference between two different frequency tones
- Interference between two similar frequency tones
- Interference between three different frequency tones
- Interference between three similar frequency tones
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Question 16 of 16

16. Question
What is the impact of multiple frequencies on gain reduction?
- They increase gain reduction
- They decrease gain reduction
- They have no impact on gain reduction
- They can either increase or decrease gain reduction
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