sample final exam EE3220

# sample final exam EE3220 - not overmodulated(circle one A...

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Name: SSN: EE 3221 Final Exam EE 3221 Lecture Quiz # 1 For the following 3 questions, use these two components: R = 4.7 k C = 0.1 μ f 1. Using these two components, draw a Low Pass Filter circuit and sketch v o vs f (x-axis) 2. Draw a High Pass Filter circuit and sketch v o vs f (x-axis) 3. An input signal is a square wave with a period T = 60 seconds. Using the LPF design: A) What is τ ? B) Approximately how long does it take for the capacitor to charge and discharge? 4. For the following circuit (on the board) we know that our minimum input signal frequency is 10 kHz. Find C E such that our minimum signal frequency sees a short out of the emitter. Z(C E ) = .1R E 5. What is the purpose of C C ? 1) An AM signal has an RF frequency of 540 kHz and a p-p amplitude of 9 volts. What is the maximum p-p amplitude that an audio frequency can have so that the total signal is

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Unformatted text preview: not overmodulated. (circle one) A: 4.5 volts B. 9 volts C: 18 VOLTS 2) Which of the following is an acceptable demodulating circuit? (Circle one.) 3) Briefly describe how an envelope detector circuit works. 4) Which differential amplifier current source topology has the better CMRR? a. Resistor current source b. BJT current source 5) What frequency does this Op-Amp circuit oscillate (Wein-Bridge Oscillator)? A) kHz B) MHz Observe the following partially drawn differential amplifier circuit: 6) Which node will the output be inverted? Node A Node B When calculating the swing range of this circuit we find that: I O = 2.0 mA I C1-SAT = I C2-SAT = 2.4 mA (Circle one) 7)What is I C1-MAX ? 0mA 1mA 2mA 2.4mA 4.4mA 8)What is I C2-MIN ? 0mA 1mA 2mA 2.4mA 4.4mA...
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sample final exam EE3220 - not overmodulated(circle one A...

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