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ECE:3410 Quiz 09
The figure is a plot of the open-loop gain function
for the LT1007 voltage amplifier. An engineer will
use the amplifier as a non-inverting amplifier with a
mid-frequency voltage gain of 10.
a) Argue that the LT1007 is a c

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ECE:3410 Quiz 10
For the BJT amplifier shown, determine and . For
the Si transistor, = 75, and assume the transistor is
operating in the forward active mode. (10 points)
(Answer: = 62.4 A, = 4.68 mA)
Solution
For the dc analysis, replace t

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ECE:3410 Quiz 07
Question 1 True or false: the diffusion capacitance of a forward-biased pn junction is
generally much larger than the junction capacitance . (1 point)
True
Question 2 True or false: the diffusion capacitance of a pn juncti

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ECE:3410 Quiz 08
The circuit shown functions as a current-controlled attenuator,
and works as follows. The input signal is small, the diode
junctions- and diffusion capacitances are such that one can
ignore them, and the coupling capacitor

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ECE:3410 Quiz 03
An engineer used the setup shown to measure the
frequency response of a circuit. She kept the input
amplitude fixed at 8 V peak-peak and measured the
peak-peak output voltage over a range of frequencies.
She collected the

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ECE 55:3410 Quiz 02
Consider the following circuit when answering the questions below.
Question 1 What is the time constant of the circuit above? (2 points)
Answer The resistance the capacitor sees is = 10K|10K = 5K, so the time constan

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ECE:3410 Quiz 04
Draw the schematic of a linear power supply that consists of a step-down transformer with secondary
(full-load) voltage of 9 VAC, a bridge rectifier, and a of 680 F smoothing capacitor. The capacitor ESR
is 0.75 . The forw

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Derive, by completing the table below, an expression for the incremental resistance for a forwardbiased pn-junction diode that is biased at a dc current . You may ignore the reverse saturation current
component.
ECE:3410 Quiz 06
Solution
1

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ECE:3140 Quiz 01
Consider the circuit shown. (a) Write a KCL equation for node A. (b) Write a KCL equation for
node O. (c) Use the two KVL equations and determine the voltage gain . Note: for the
KCL equations, use the convention that t

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ECE:3410 Quiz 05
Part a. There are several methods of determining the bandwidth of a low-pass STC circuit. One method
is to use a sine-wave signal generator and measure the output/input ratio over a range of frequencies. The
other method i