ECEG 351 Electronics II Spring 2017 Selected Answers to HW #5 [answer to Prob. 9.2 corrected 3/8/17; answer to Prob. 1 added 3/19/17] Remember to explain all answers in your solutions. You will not receive credit for merely repeating an answer given here. When an answer is not given below, it is either because the solution is trivial or because disclosure of the answer would give away too much of the solution to the problem. Although significant effort has been made to ensure that there are no errors in the answers below, some might nevertheless appear. Please let me know as soon as possible if you discover an apparent error. a. |VOV| = 0.35 V; = 1.15 V; = 1.15 V; = = V 9.2 [VD1, errors VSG VS VD1 VD2 VD2 −1.5 corrected 3/8/17] b. V < < 0.95 V VCM −2.3 9.6 = 12.5 k; = 4.0 k; = 44.4; = 44.4; = 88.8; = 22.2 R RD W1/L1 W2/L2 W3/L3 W4/L4 V < < 0.5 V VCM −0.2 9.16 a. = 426 A/V gm b. = 85 A I c. = 2.0 V VRD d. = 0.1 V (small-signal magnitude only) vdpk e. > 2.1 V VDD = 0.41 1. [answer added 3/19/17] x 2. [expression for not vC2 3. < 1.8 mA; = 360 V/V at = 1.8 mA I Ad I 4. resistor value mismatch = 2% 5. [proof]
ECEG 351 Electronics II Spring 2017 Selected Answers to HW #5 [answer to Prob. 9.2 corrected 3/8/17; answer to Prob. 1 added 3/19/17] Remember to explain all answers in your solutions. You will not receive credit for merely repeating an answer given here. When an answer is not given below, it is either because the solution is trivial or because disclosure of the answer would give away too much of the solution to the problem. Although significant effort has been made to ensure that there are no errors in the answers below, some might nevertheless appear. Please let me know as soon as possible if you discover an apparent error. 9.2 a. |VOV| = 0.35 V; VSG = 1.15 V; VS = 1.15 V; VD1 = VD2 = −1.5 V [VD1, VD2 errors corrected 3/8/17] b. −2.3 V < VCM < 0.95 V 9.6 R = 12.5 k; RD = 4.0 k; W1/L1 = 44.4; W2/L2 = 44.4; W3/L3 = 88.8; W4/L4 = 22.2 −0.2 V < VCM < 0.5 V 9.16 a. gm = 426 A/V b. I = 85 A c. VRD = 2.0 V d. vdpk = 0.1 V (small-signal magnitude only) e. VDD > 2.1 V 1. x = 0.41 [answer added 3/19/17] 2. [expression for vC2 not 3. I < 1.8 mA; Ad = 360 V/V at I = 1.8 mA 4. resistor value mismatch = 2% 5. [proof]
eceg351hw5answers_sp17.docx