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MidtermExam#1_2008

# MidtermExam#1_2008 - Name So L v1T I t rJ ~ EE 482...

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So L. v1T I t rJ~ Name: -------------- EE 482 - Electronics II Mid-Term Exam # 1 Thursday, March 27, 2008 Use only these pages for your calculations and answers. There are 50 total points. Answer all questions. Work must be shown for partial credit. ;j 9fX points) 1.An amplifier is shown in the figure below. NMOSdevice data: kn = 1.66 mA/V2; VtNO = +0.4 V; Yn = 0 Vl/2; A = 0 for DC analysis and A = 0.1 V-I for small-signal analysis; X = 0.2. (a)Choose Rs to make the DC voltage at the drain, VD = 1V. VerifYall assumptions. jX"pts} / 1!7 1.5 V 2.5 kD 1.67 kD IOOkD -1.5 V -- ,\ (yl! ,/ rc'"' 'c). ~ f : •.. '\ v, - - /4- V ":0" 'Ie.- - V(.) --- ::: 0, Ie V \j) ~ _ J L~ vD;)cI -::. V c ) ~ V t - r (b)Calculate Rin . .pt pts} == I C{ fA II I. i l;! Page 1 of 3

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Initials: ----- 1.5 V 2.5 kQ 1.67ill 100 kQ -1.5 V (d)Consider the small-signal equivalent circuit. If Va is a 0.3 V sinusoidal signal (Va = 0.3 sinrot),determine the signal at the MOSFETsource, V s (not Vsig). [5 pts} u - s - L __ oF~-~" 11 - _ 11<" ~'S ( = -:>1 )----- ._-_.-_.. j.
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• Spring '07
• Bowman
• Trigraph, The Signal, small-signal equivalent circuit, NMOS device data, permissible output voltage, PMOS-based current source

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