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ESE 324 Midterm Exam Solution..................

Question # 00022377
Subject: Engineering
Due on: 09/21/2014
Posted On: 08/07/2014 07:43 PM
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3/15/12 ESE 324 Midterm Exam STUDENT’S NAME________________________
QUESTION #1
Answer the following questions with a single sentence.
A) What is body effect in CMOS circuits?
B) What does “dead zone” of a phase detector refer to?
C) What is the primary difference between linear and nonlinear oscillators?
D) What is the primary difference between a latch and a flip-flop?
E) What is hysteresis effect? Provide an example to illustrate how it can be used.3/15/12 ESE 324 Midterm Exam STUDENT’S NAME________________________
QUESTION #2
Two circuits are shown in the figure above. Assume Vdd=7. The threshold voltage for NMOS
transistors is 3 V and the threshold voltage for PMOS transistors is -4 V. Initially both inputs are
at zero voltage. Nodes A and B are also initially at zero voltage. C is at Vdd. Similarly, nodes A’
and B’ are initially at zero voltage and C’ is at Vdd. Both inputs have a step transition to Vdd.
Determine the final voltage at nodes A, B, C, A’, B’, and C’. 3/15/12 ESE 324 Midterm Exam STUDENT’S NAME________________________
QUESTION #3
A relaxation based nonlinear oscillator is shown in the figure above. Note that Vdd=12 Volts and
Vss= -12 Volts.
A) Based on the resistances and capacitance, calculate the oscillation frequency at the
output.
B) What can be done to decrease the oscillation frequency?
Hint: The voltage of a capacitor that is charging or discharging through a resistor R toward a
final voltage Vf is determined by
( ) ( ) where V is the voltage at t 0 and RCis the time constant 0
/
? ? ? 0 ?
? ? ?
?
?
?
t ?
f f
v t V V V e
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ESE 324 Midterm Exam Solution..................

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