Problem 1. (25 pts) Topic: Amplifier. Assume all transistor…
Problem 1. (25 pts) Topic: Amplifier. Assume all transistors in saturation. Consider gm and ro. Ignore gmb. a. Derive equation for Voltage Gain as a function of frequency () (10 points) b. Analyze circuit behavior (15 points) Gain at very low frequencies Gain at high frequencies Plot Gain vs. Frequency and identify the levels on Y axis and inflection points on X axis Redraw the same plot of Gain vs. Frequency if C1 is 0. Problem 2. (20 pts) Noise (assume only thermal and flicker noise) a. Derive the Gain, Output and Input referred noise for the above amplifier (assume correct biasing). (10 points) b. Derive the Gain, Output and Input referred noise for the above amplifier (assume correct biasing). Show equations in terms of . (10 points) Problem 3. (35 pts) Consider the following circuit, assume that correct biasing is done, neglect body effect. M1 has transconductance gm1 and output resistance ro1 and similar for M2. a) Identify the Feedback. (5 points) b) Consider the forward path amplifier, what is the open loop gain? (5 points) c) What is the feedback factor? (5 points) d) Derive open loop input impedance Rinopenloop. (5 points) e) Derive closed loop input impedance Rinclosedloop. (10 points) f) Does the output impedance increase or decrease with feedback? (5 points) Problem 4. (20 pts) Consider the following circuit, assume ideal MOS switches, neglect body effect. Assume V1, V2 and Vo has 0 voltage at the start. a) Draw V1, V2 and Vo as function of time. (10 points) b) What is the value at Vo after 3rd cycle of clock? (5 points) c) What function or functions does the circuit achieve? (5 points) Congratulations, you are almost done with this exam. DO NOT end the Honorlock session until you have submitted your work to Brightspace. When you have answered all questions: Use your smartphone or scanner to scan your answer sheet, and save the scan as a PDF. Make sure your scan is clear and legible. Submit your PDF as follows: Email your PDF to yourself or save it to the cloud (Google Drive, etc.). Submit your exam to this assignment: Midterm Exam Submission Return to this window and click the button below to agree to the honor statement. Click Submit Quiz to end the exam. End the Honorlock session.
Read Details