Quiz 4 MOSFET Amplifiers EEE 334 Circuits II (2023 Fall)

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Arizona State University *

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334

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Electrical Engineering

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Apr 3, 2024

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Quiz 4: MOSFET Amplifiers Due Nov 15 at 11:59pm Points 10 Questions 6 Available Nov 11 at 12am - Nov 15 at 11:59pm Time Limit None Allowed Attempts 2 Instructions This quiz was locked Nov 15 at 11:59pm. Attempt History Attempt Time Score KEPT Attempt 2 4 minutes 10 out of 10 LATEST Attempt 2 4 minutes 10 out of 10 Attempt 1 28 minutes 9 out of 10 Score for this attempt: 10 out of 10 Submitted Nov 15 at 5:44pm This attempt took 4 minutes. Quiz 4 Instructions: • You may use your textbook, class notes, or any other textbook. You may use a calculator. • You may not use the internet. The only exception is to access an electronic version of the textbook. • You will be given two attempts. Quiz 4 has no time limit per attempt. However, all submissions must be Quiz 4: MOSFET Amplifiers: EEE 334: Circuits II (2023 Fall) https://canvas.asu.edu/courses/151244/quizzes/1134050 1 of 6 12/6/2023, 12:05 PM

1 / 1 pts Question 1 Find the answer that lists the correct amplifier names of the circuits below. a) b) c) a) common source, b) common drain, c) common gate Correct! Correct! Quiz 4: MOSFET Amplifiers: EEE 334: Circuits II (2023 Fall) https://canvas.asu.edu/courses/151244/quizzes/1134050 2 of 6 12/6/2023, 12:05 PM

a) common source, b) common gate, c) common drain a) common drain, b) common source, c) common gate a) common gate, b) common source, c) common drain Consider the following common source amplifier with a current mirror load (the textbook refers to this as the "basic gain cell"). Use the circuit to answer Question 2, 3, 4, 5 and 6. Assume the following process parameters: Quiz 4: MOSFET Amplifiers: EEE 334: Circuits II (2023 Fall) https://canvas.asu.edu/courses/151244/quizzes/1134050 3 of 6 12/6/2023, 12:05 PM

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V = 3.3V V = |V | = 0.5V k ’ = 5 mA/V k ’ = 3.2 mA/V DD tn tp n 2 p 2 1 / 1 pts Question 2 The operating region of PMOS Q is best described as? 3 If conducting it is in saturation. Correct! Correct! If conducting it is in triode. If conducting it is in triode or saturation depending on V . GSp 1 / 1 pts Question 3 The operating region of PMOS Q is best described as? 2 If conducting it is in saturation. Quiz 4: MOSFET Amplifiers: EEE 334: Circuits II (2023 Fall) https://canvas.asu.edu/courses/151244/quizzes/1134050 4 of 6 12/6/2023, 12:05 PM

If conducting it is in triode. If conducting it is in triode or saturation, depending on V and V Correct! Correct! GSP o 2 / 2 pts Question 4 You are now told that I =500µA and (W/L) =10, (W/L) =10, (W/L) =5. Assume all transistors are in saturation. Find the DC bias current, I . (Ignore the Early effect). REF Q1 Q2 Q3 D 100µA 200µA 500µA 1000µA Correct! Correct! 2 / 2 pts Question 5 Find the transconductance of Q1, g . (Ignore the Early effect). m1 Quiz 4: MOSFET Amplifiers: EEE 334: Circuits II (2023 Fall) https://canvas.asu.edu/courses/151244/quizzes/1134050 5 of 6 12/6/2023, 12:05 PM

10 mA/V Correct! Correct! 7 mA/V 5 mA/V 2 mA/V 3 / 3 pts Question 6 Find the voltage gain, A , if you are given the Early voltages are: V =10V (NMOS) |V |=5V (PMOS) v An Ap - 10.25 V/V - 26.6 V/V - 33.3 V/V Correct! Correct! - 40.75 V/V Quiz Score: 10 out of 10 Quiz 4: MOSFET Amplifiers: EEE 334: Circuits II (2023 Fall) https://canvas.asu.edu/courses/151244/quizzes/1134050 6 of 6 12/6/2023, 12:05 PM

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