EE 230
Homework 13
Spring
2010
Solve any 5 of the following 8 problems.
Problem 1
A 4bit ADC has the first transition point
at V
LSB
and subsequent
transition points spaced V
LSB
apart.
If V
REF
for this ADC is 5V, what is the quantization
error for VIN=0.33V?
Problem 2
If a sampling clock is fixed at 10KHz, what is the maximum frequency
component of an input signal that can be present if there is to be no aliasing in the ADC
process?
Problem 3
Assume a signal is band limited to 1KHz but there is an unwanted
component present at 3.2KHz.
If the desired signal is a 100Hz sinusoid of amplitude 3V
pp centered around 2.5V and V
REF
=5V, determine the magnitude of the aliased signal
and the frequency of the aliased signal if the input is sampled at 2KHz and the amplitude
of the undesired 3.2KHz signal is 0.5V pp (and also centered around 2.5V).
Problem 4
If a lowpass filter with a dc gain of 1 and 3 poles, all at 3KHz is used as an
antialiasing filter, at what frequency will the aliased signal of Problem 2 appear and what
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This note was uploaded on 02/01/2012 for the course EE 230 taught by Professor Mina during the Fall '08 term at Iowa State.
 Fall '08
 mina

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