Deck 5: Converting Between Analog and Digital Signals

Question 1

A smartphone display has 1200 columns and 800 rows, spatial frequencies in a row less than
____ will not produce aliasing.

Answer 1

600.The spatial frequency has two samples per period.

Question 2

If the maximum frequency present in an analog waveform the period of the
sampling frequency must be less than _______

Answer 2

Question 3

A movie shot at 30 frames per second shows a moving wagon having wheels that appear not to
be rotating.The minimum rotational speed that produces this aliasing is ______ revolutions per
second.

Answer 3

Question 4

When the sampling frequency equals the time required for a 10-bit successive-
approximation quantizer to make a comparison is

Question 5

A 1,020 Hz sinusoidal waveform that is sampled with produces the alias frequency equal
to ____ Hz?

Question 6

When the sampling frequency equals the sample-and-hold operation maintains the
sample value for _____

Question 7

When the sampling frequency the time required for a 10-bit staircase quantizer to
make a comparison is

Question 8

Your computer uses 8-bits to control the intensity of each R, G, and B LED.the number of
different possible colors that an LED can produce equals _____.

Question 9

A b-bit quantizer spans between 0 and 5V produces a quantization error of less than 0.01V.The
value of minimum value of b equals _____.

Question 10

An 10-bit quantizer that extends from 0 to 5V has step size

Question 11

A 8-bit quantizer that extends from 0 to 5V has produces the binary value 0101 0101.The
quantized voltage

Question 12

An audio CD can store 650 million bytes of data.If with 16-bit quantization, the
duration of stereo (two-separate channels) music that can be stored on a CD is ____ (xx) minutes.

Question 13

Consider the analog signal A value of is chosen that produces
aliasing.If the aliasing frequency equals fa = 200Hz, the sampling rate that caused this aliasing
can be either ____ kHz or ____ kHz.

Question 14

An 8-bit PWM DAC with period has sub-interval duration

Question 15

The number of steps in an 18-bit quantizer equals _____.