Exam1_Summer2004 - / ECE 3042 Lecture FRIDAYJUNE 4, 2004, 4...

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/ ECE 3042 Lecture Exam No.1 Summer 2004 FRIDAYJUNE 4, 2004, 4 PM GTID No.9 Name K~ Totally Closed Book and Note. Calculator Permitted. Four Equally Weighted Problems. All Work Must Be Shown for Credit. 1. Shown below is a single stage common emitter amplifier using an 2N3904 NPN BJT as the active device. Design the circuit so that the dc collector current, Ie, is 1.75 mA and the dc collector voltage is 10 V above ground. The design specification for the magnitude of the small signal midband voltage gain (lifo/Vii) is 7.3. For the design calculations assume that the base-to-emitter dc voltage drop is 0.65 V, the dc current in RBI is 101E, f3 = 180, the base spreading resistance is zero, the thermal voltage is 25.9 mV, and the Early voltage is infinity. Determine the values of the resistors RBI, RB2' Re, and RE2 to satisfy the design criteria. a I~ () ,"I Dlqq 0<. f-/ -- --(.,,1,-, / = R+, - I~I- .- 1$-10;:. 2..,%S7A. . V+=15V loJ Rc. - [,""7S v + t IE =. ~ =- 1.7£ /1 \ I Toe:: 2., b If V
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This note was uploaded on 04/17/2008 for the course ECE 3042 taught by Professor Brewer during the Spring '08 term at Georgia Institute of Technology.

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Exam1_Summer2004 - / ECE 3042 Lecture FRIDAYJUNE 4, 2004, 4...

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