HW9 - Georgia Institute of Technology School of Electrical...

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Unformatted text preview: Georgia Institute of Technology School of Electrical and Computer Engineering ECE 3040A Microelectronic Circuits Homework 9 Due; Friday, 1013119008 in class i. (25 points) (a) Design a four-resistor bias network for an npn transistor {as shown in Figure P1) to give 1:; ~10 M and Veg = 6 V if Vac =18 V and W -- 7S. Assume that in the active region V35 = 0.7 V. {b}.Afler Hurting the resistors in the circuit, replace them by the nearest available values from the attached table and calclflatc It: and VCR for the final circuit. 2. (25 points) Simulate the circuit showrt in Figan using SPICE, and cdeate the results with you: hand calculatiotLtUse; 15 = 1 x 10"“ A. [5,. = 75, [3,. = 0.25. and Vnzm. fix 110? a, f“: 611k“ um i Q: i ,. i” Ftfium pet F.th_ 9:, 3. (25 points) (3} Find the Q pomt of the transistor showu in Figure P3. (11) Find the l'Ollfigc gain (4% = VJ‘L'E), input resistance (Hg), and output resistance (Re) as shown in the figure. Assume VBE = 0.? V. VA = 60 v, and 3:: __ f3” 2 5:1 36m 33*“ .- -1. 25 points) Repeat problem 3 for the circuit shown in Figure P4. tfiv ...
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