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ECE 3204 1 Analog Electronics Instructor: Prof. Masoud Agah Test #4 10 0 Points ……………………….. Points Name: ……………………………………. Justify All Steps! Provide analyses and calculations Do All Work on Exam Papers Your Answers/Writing MUST BE CLEAR/ORGANIZED Do Not Discuss the Exam Until the Solutions Are Available This is entirely my own work. I have not received any help from anybody nor given help to anybody for this test. Except for the course instructor or the course TA, I have not communicated with anybody about th is test or the course materials during the time I am taking this exam. This includes before and after uploading my answers on Canvas. I respect and abide by the honor code. Signature: ------------------------------------------------------------------- ----------- ECE 3204 2 1) In the circuit shown below, derive the expression for the differ ential -mode input resistance (15 pt), common -mode input resistance (15 pt), and the voltage gain (20pt) ? REE is the output resistance associated with I Q and won’t be part of the DC circuit. ECE 3204 3 ECE 3204 4 2) Calculate the voltage gain (vod/vd) where vd=v1 -v2 ( 20 pt). Rs depicted below is the output resistance of the current sources (I Q). ECE 3204 5 3) In the amplifier shown below, d etermine the DC current of Q1 (5 pt) and the differential voltage gain (25pt) as a function of gm1 and the output resistances. Please note that the W/L of Q7 to Q8 is 1 to 2 as shown below (for Q7 is 1:1 and for Q8 is 1:2 so that ratio will be 1:2).