DE Chapter 3

As more electronic systems have been designed using digital technology, devices have become smaller and less powerful

F

A digital audio system makes a copy of the waveform

F

A digital audio system stores a code, a series if amplitude numbers, that tells the compact disc player how to re-create the original sound every time a disc is played

T

The binary number system is a positional notation system

T

Hexadecimal numbers are primarily used as a shorthand of binary

T

The signal on a CD is sampled ___________ times a second

44,100

assigning the digit 1 to a logic HIGH and digit 0 to logic LOW is called ___________

positive logic

The hexidecimal system is based on powers of

16

A momentary variation of voltage from one logic level to the opposite level and back again is called...

pulse

The rightmost bit of a binary number is the

least significant bit

Which of the following does not apply to digital signals

Continuously Variable

A __________ system is a system of writing numbers where the value of a digit depends not only on the digit, but also on its placement within a number

positional notation

After the binary system, ______ numbers are the most often used in digital applications

hexadecimal

_________ is a fraction of the total period that a digital waveform is in the HIGH state

Duty Cycle

______ is a time-varying sequence of logic HIGHs and LOWs that repeats over a specified period of time.

Periodic waveform

A special case of symmentrical periodic waveform is a:

Clock signal

_________ is a system in which low represents binary digit 1 and high represents 0

Negative logic

A truth table is a list of output levels of a circuit corresponding to all different

input combinations

For binary numbers from 0000 to 1111, the decimal equivalents are _____.

15

Two commonly used methods to convert decimal to binary

sum of powers of 2 and repeated division by 2