34.1.6 - Finding Drain Resistance
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Practice Questions
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What is the role of bias resistors in a common source amplifier?
💡 Hint: Think about what voltage needs to be applied at the gate.
Define threshold voltage.
💡 Hint: What happens when VGS is below this value?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the approximately calculated value of RD using Vdd = 12V, VGS = 2V, and IDS = 0.5 mA?
💡 Hint: Apply the formula for RD.
True or False: Increasing the bias current will always lead to a higher output swing.
💡 Hint: Consider how changes in current can affect range.
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Challenge Problems
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Design a common source amplifier for a desired output voltage swing of +/- 3V using Vdd = 12V and a threshold voltage of 1V. Determine the values of R1, R2, and RD.
💡 Hint: Break down the design based on maintaining balance around the center voltage.
What will happen to the output gain if RD is increased without changing VGS? Explain and calculate.
💡 Hint: Look into the effects on gain per the transistor’s equations to fully understand this.
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