EE311Fall2012HW5.pdf - EE 311 Analog Electronics Take Home Exam#5 Due December 5 2012(in class Frequency Response of Amplifiers Q1 For the common source

EE311Fall2012HW5.pdf - EE 311 Analog Electronics Take Home...

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EE 311 Analog Electronics Take Home Exam #5 Due: December 5, 2012 (in class) Frequency Response of Amplifiers Q1. For the common source amplifier given in the figure, v in is an AC voltage source. Assume that capacitors C 1 , and C 2 are very large. a) Determine the midband gain A v =v out /v in . b) Determine the upper-cutoff frequency (f H ) using the open-circuit time constant (OCTC) method. c) Determine the upper-cutoff frequency (f H ) using Miller Theorem, and compare with your result in b). d) Verify your theoretical findings for the midband gain and f H using SPICE simulations. Q2. For the common-gate amplifier given in the figure, C 1 C 2 C 3 R 1 R 2 R 3 R i R S +V DD + - R L v o v i a) Draw the small signal equivalent circuit, and determine the midband gain (
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Unformatted text preview: A v = v o / v i ) of the amplifier. b) Determine the lower 3-dB cut-off frequency (f L ) using short circuit time constant method. c) Verify your theoretical findings for the midband gain and f L using SPICE simulations. M 1 parameters V TN = 1 V K N = 1.2 mA/V 2 λ = 0 C gs = 0.8 pF C gd = 0.2 pF V DD = 12 V R sig = 1 kΩ R 1 = 400 k Ω R 2 = 100 k Ω R D = 6 kΩ R S = 1 kΩ R L = 12 kΩ Enhancement type NMOS Q-point (I D , V DS )= (0.1 mA, 8.6 V) V GS - V TN = 1 V λ=0 R i = 2 k  R 1 = 1.5 M  R 2 = 2.2 M  R 3 = 22 k  R S = 12 k  R L = 100 k  C 1 = 4.7 μF C 2 = 0.1 μF C 3 = 0.1 μF V DD = 12 V...
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