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Digital Circuits Final Review
Questions from all of the class tests to study for the final.
234
Electrical Engineering
09/06/2013

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Cards

Term
A. True
Definition
. UNIT 1 EXAM
The values of an analog signal flow smoothly from one to the next.

A. True
B. False
Term
A. True
Definition
. UNIT 1 EXAM
Digital systems respond to voltage levels that change abruptly between two levels (high and low).

A. True
B. False
Term
A. True
Definition
. UNIT 1 EXAM
The DIP package style has two parallel rows of through-hole pins.

A. True
B. False
Term
B. resistor
Definition
. UNIT 1 EXAM
This device is added to the input of a gate when used with a SPST switch to pull up or down the logic state opposite of the input when the switch is closed.

A. diode
B. resistor
C. inductor
D. capacitor
Term
A. displays, injects
Definition
. UNIT 1 EXAM
A logic probe _______ a signal, while a logic pulser _______ a signal.

A. displays, injects
B. injects, displays
C. toggles, injects
D. injects, toggles
Term
B. 1.2V
Definition
. UNIT 1 EXAM
Which TTL voltage could cause problems in a digital circuit?

A. 0V
B. 1.2V
C. 0.2V
D. 4V
Term
B. False
Definition
. UNIT 1 EXAM
CMOS and TTL voltages are the same.

A. True
B. False
Term
A. True
Definition
. UNIT 1 EXAM
Digital signals are composed of two well-defined voltage levels.

A. True
B. False
Term
D. 2 V or greater
Definition
. UNIT 1 EXAM
For TTL, the logic probe will indicate a high for

A. less than 1 V
B. less than 2 V
C. 0 V
D. 2 V or greater
Term
B. digital circuits are manufactured at a fraction of the cost
Definition
. UNIT 1 EXAM
Which of the following is not an advantage of using digital circuitry over analog circuitry?

A. digital circuits are typically easier to design using ICs
B. digital circuits are manufactured at a fraction of the cost
C. more accuracy and precision is possible with digital circuits
D. digital circuitry is less affected by unwanted electrical interference
Term
A. a digital circuit
Definition
. UNIT 1 EXAM
A circuit that operates by using only high and low signals is called

A. a digital circuit
B. an analog circuit
C. a rectifier circuit
D. a filter circuit
Term
C. CMOS
Definition
. UNIT 1 EXAM
Digital voltage levels that range from near 0 V for low and +3 V to +5 V for high are commonly called

A. TTL
B. ECL
C. CMOS
Term
C. more selectivity in audio amp application
Definition
. UNIT 1 EXAM
Which of the following is not an advantage of digital circuitry over analog?

A. easier to design using ICs
B. information storage easy to implement
C. more selectivity in audio amp applications
D. less affected by noise
Term
A. is one that has a signal that varies continuously
Definition
. UNIT 1 EXAM
An analog device

A. is one that has a signal that varies continuously
B. can be used as a logic gate
C. typically switches between two voltage levels
D. generally can be analyzed by using binary logic
Term
C. 0 V to 5 V
Definition
. UNIT 1 EXAM
Digital signals have voltage levels that generally range from

A. 0 V to 2 V
B. 2 V to 8 V
C. 0 V to 5 V
D. 5 V to 9 V
Term
B. False
Definition
. UNIT 1 EXAM
The current and voltage are unimportant in analog signals.

A. True
B. False
Term
B. False
Definition
. UNIT 1 EXAM
The word "bit" is an acronym for binary decimal.

A. True
B. False
Term
invalid
Definition
. UNIT 1 EXAM
The _________ region between high and low may cause trouble in digital circuits and should be avoided.
Term
current
Definition
. UNIT 1 EXAM
A series-connected resistor in an LED output circuit keeps the _________ at a safe level.
Term
TTL
Definition
. UNIT 1 EXAM
For _________, the logic probe will indicate a low for 0.8 V or less.
Term
A. True
Definition
.
UNIT 2 EXAM
Digital electronic devices use a number system called the binary number system.

A. True
B. False
Term
B. False
Definition
.
UNIT 2 EXAM
The decimal number system uses only two symbols 0 and 1.

A. True
B. False
Term
A. True
Definition
.
UNIT 2 EXAM
The binary number 1100 represents the decimal number 12.

A. True
B. False
Term
B. False
Definition
.
UNIT 2 EXAM
The hexadecimal number system uses 10 symbols.

A. True
B. False
Term
A. True
Definition
.
UNIT 2 EXAM
The octal number system uses 8 symbols.

A. True
B. False
Term
A. bit
Definition
.
UNIT 2 EXAM
A single binary number (either a 0 or a 1) is called a

A. bit
B. byte
C. word
D. nibble
Term
A. base 2 system
Definition
.
UNIT 2 EXAM
The binary number system is also called the

A. base 2 system
B. base 8 system
C. base 10 system
D. base 16 system
Term
C. 11
Definition
.
UNIT 2 EXAM
The binary number 1011 is equal to the decimal number

A. 9
B. 10
C. 11
D. 12
Term
A. 2
Definition
.
UNIT 2 EXAM
The weight or value of each place in binary is referred to as a power of:

A. 2
B. 4
C. 8
D. 16
Term
B. decimal to binary
Definition
.
UNIT 2 EXAM
The repeated divide-by-2 process is used when you want to convert

A. binary to decimal
B. decimal to binary
C. octal to binary
D. hexadecimal to binary
Term
D. 47
Definition
.
UNIT 2 EXAM
What is the decimal equivalent for the hexadecimal number 2F?

A. 10
B. 15
C. 25
D. 47
Term
D. 17
Definition
.
UNIT 2 EXAM
What is the octal equivalent to the decimal number 15?

A. 10
B. 20
C. 15
D. 17
Term
C. 255
Definition
.
UNIT 2 EXAM
What is the decimal equivalent to the hexadecimal number FF?

A. 127
B. 15
C. 255
D. 511
Term
D. American Standard Code for Information Interchange
Definition
.
UNIT 2 EXAM
ASCII stands for:

A. American Secret Code for International Information
B. American Standard Code for International Information
C. American Secret Code for Information Interchange
D. American Standard Code for Information Interchange
Term
A. 0, 1
Definition
.
UNIT 2 EXAM
In a signed number, a _____ indicates positive and a _____ indicates negative.

A. 0, 1
B. 1, 0
Term
11001 + 1101 = 100110
Definition
.
UNIT 2 EXAM
Add 11001 to 1101.
Term
01111 - 01100 -->

01111 + 10100 = 100011
Definition
.
UNIT 2 EXAM
Subtract 01100 from 01111 using 2's complement.
Term
00100001

000100000001

100110010010
Definition
.
UNIT 2 EXAM
Convert the following to BCD.

21

101

992
Term
13

57
Definition
Convert the following:
Binary to Decimal

1101

111001
Term
1001

11011
Definition
.
UNIT 2 EXAM
Convert the following:
Decimal to Binary

9

27
Term
110 = 6

1111 = 001 111 = 17

11001 = 011 001 = 31
Definition
.
UNIT 2 EXAM
Convert the following:
Binary to Octal

110

1111

11001
Term
100100 = 32 + 4 = 36
36/16 = 2 4
2/16 = 0 2
== 24

1110111 = 64 + 32 + 16 + 4 + 2 + 1 = 119
119/16 = 7 7
7/16 = 0 7
== 77
Definition
.
UNIT 2 EXAM
Convert the following:
Binary to Hexadecimal

100100

1110111
Term
21 = 0010 0001 = 32 + 1 = 33

1A1 = 0001 1010 0001 = 256 + 128 + 32 + 1 = 417
Definition
.
UNIT 2 EXAM
Convert the following:
Hexadecimal to Decimal

21

1A1
Term
12/16 = 0 12
= C

16/16 = 1 0
1/16 = 0 1
= 10

35/16 = 2 3
2/16 = 0 2
= 23

1023/16 = 63 15
63/16 = 3 15
3/16 = 0 3
= 3FF
Definition
.
UNIT 2 EXAM
Convert the following:
Decimal to Hexadecimal

12

16

35

1023
Term
B. AND gate
Definition
.
UNIT 3 EXAM
Any zero in results in a zero out describes a:

A. NOT gate
B. AND gate
C. NAND gate
D. OR gate
Term
B. 1
Definition
.
UNIT 3 EXAM
A 3-input NAND gate has the following inputs: 0, 0, 1. What is the output?

A. 0
B. 1
C. can't be determined
Term
D. exclusive OR
Definition
.
UNIT 3 EXAM
The output is high on this gate when a 1 is present on either input, but not both.

A. AND
B. OR
C. NOR
D. exclusive OR
Term
A. True
Definition
.
UNIT 3 EXAM
The unique output of the AND function is a high output only when all inputs are high.

A. True
B. False
Term
B. False
Definition
.
UNIT 3 EXAM
The AND gate is sometimes called the any or all gate.

A. True
B. False
Term
A. True
Definition
.
UNIT 3 EXAM
The NOT circuit has one input and one output.

A. True
B. False
Term
B. False
Definition
.
UNIT 3 EXAM
The unique output of the NAND function is a low output only when all inputs are low.

A. True
B. False
Term
A. True
Definition
.
UNIT 3 EXAM
The NOR gate is not the same as the OR gate in operation.

A. True
B. False
Term
D. exclusive NOR
Definition
.
UNIT 3 EXAM
Which logic gate provides a low output only when an odd number of inputs are high?

A. AND
B. OR
C. exclusive OR
D. exclusive NOR
Term
D. low-power Schottky
Definition
.
UNIT 3 EXAM
The letters LS in the core part number of a 7400 series IC stand for

A. CMOS
B. Fast Fairchild
C. low signal
D. low-power Schottky
Term
C. static charges
Definition
.
UNIT 3 EXAM
If caution is not exercised, CMOS ICs can be damaged by

A. tying unused inputs to ground
B. tying unused inputs to VDD
C. static charges
D. using them as NAND gates
Term
Definition
.
UNIT 3 EXAM
This is the logic symbol for a(n)

A. AND gate
B. NOT gate (inverter)
C. OR gate
D. NAND gate
Term
Definition
.
UNIT 3 EXAM
This is the logic symbol for what type of gate?

A. XOR
B. OR
C. NOR
D. AND
Term
Definition
.
UNIT 3 EXAM
This is an alternative logic symbol for what type gate?

A. XOR
B. OR
C. NOR
D. AND
Term
B. describes the output based on the input
Definition
.
UNIT 3 EXAM
A digital gate's truth table:

A. describes the timing of a circuit
B. describes the output based on the input
C. describes the input based on the output
Term
D. the chip has a plastic package
Definition
.
UNIT 3 EXAM
You are looking at a SN7474P digital IC. The P means:

A. the chip has a dual in-line package
B. the chip has a ceramic package
C. the chip was manufactured by Intel
D. the chip has a plastic package
Term
A. grounded or connected to a supply voltage
Definition
.
UNIT 3 EXAM
On unused CMOS inputs, the inputs should be:

A. grounded or connected to a supply voltage
B. left alone as this is OK
C. always grounded
D. the legs (inputs) should be cut off
Term
A. OR gate
Definition
.
UNIT 3 EXAM
This is the truth table for a(n) _____.

A. OR gate
B. NAND gate
C. AND gate
D. NOR gate
Term
Definition
.
UNIT 3 EXAM
This is a truth table for a(n) _____.

A. NOR gate
B. OR gate
C. NAND gate
D. AND gate
Term
B. False
Definition
.
UNIT 4 EXAM
The Boolean expression is a universal language used by engineers and technicians in analog electronics.

A. True
B. False
Term
A. True
Definition
.
UNIT 4 EXAM
The terms negated, complemented, and inverted mean the same thing.

A. True
B. False
Term
Definition
.
UNIT 4 EXAM
Term
B. A + B + C = Y
Definition
.
Which of the following could be a Boolean expression for a three-input OR gate?

A. A + B = Y
B. A + B + C = Y
C. A * B * C = Y
D. A = Y
Term
B. False
Definition
.
UNIT 4 EXAM
Boolean multiplication is symbolized by A + B.

A. True
B. False
Term
A. True
Definition
.
UNIT 4 EXAM
In Boolean algebra, 1 * 0 = 0.

A. True
B. False
Term
A. True
Definition
.
UNIT 4 EXAM
The Boolean expression for a three-input AND gate is: x = ABC.

A. True
B. False
Term
B. False
Definition
.
UNIT 4 EXAM
When a two-input NAND gate has inputs of 1 and 0, the output is 0.

A. True
B. False
Term
B. False
Definition
.
UNIT 4 EXAM
The commutative law of Boolean addition states that A + B = A * B.

A. True
B. False
Term
Definition
.
UNIT 4 EXAM
Term
C. 0 + 1 = 1
Definition
.
UNIT 4 EXAM
Which of the following is a correct form of Boolean addition?

A. 0 * 0 = 0
B. 0 * 1 = 0
C. 0 + 1 = 1
D. 0 + 1 = 0
Term
D. 0 * 1 = 0
Definition
.
UNIT 4 EXAM
Which of the following is a correct form of Boolean multiplication?

A. 0 + 1 = 0
B. 0 + 1 = 1
C. 0 * 1 = 1
D. 0 * 1 = 0
Term
B. not A
Definition
.
UNIT 4 EXAM
In Boolean algebra, the expression "_____" means the complement of A.

A. inverse A
B. not A
C. A negative
D. negative A
Term
Definition
.
UNIT 4 EXAM
Term
D. A + (B + C) = (A + B) + C
Definition
.
UNIT 4 EXAM
Which of the examples below expresses the associate law of addition?

A. A(BC) = (AB) + C
B. ABC = A + B + C
C. A + (B + C) = A + (B * C)
D. A + (B + C) = (A + B) + C
Term
Definition
.
UNIT 4 EXAM
Term
Definition
.
UNIT 4 EXAM
Term
Definition
.
UNIT 4 EXAM
Term
Definition
.
UNIT 4 EXAM
Term
A. True
Definition
.
UNIT 5 EXAM
Combinational logic is an interconnection of logic gates to generate a specified logic funtion where the inputs result in an immediate output.

A. True
B. False
Term
B. False
Definition
.
UNIT 5 EXAM
The truth table is a precise method of describing how an analog circuit works.

A. True
B. False
Term
A. True
Definition
.
UNIT 5 EXAM
Karnaugh mapping is an easy-to-use graphic method of simplifying Boolean expressions.

A. True
B. False
Term
A. True
Definition
.
UNIT 5 EXAM
The truth table for four variables has 16 possible combinations.

A. True
B. False
Term
B. False
Definition
.
UNIT 5 EXAM
And gates are often used to wire combinational logic circuits because they are easy to use and readily available.

A. True
B. False
Term
A. True
Definition
.
UNIT 5 EXAM
De Morgan's theorems help to eliminate long overbars that cover several variables.

A. True
B. False
Term
C. a programmable logic device
Definition
.
UNIT 5 EXAM
An IC that can be programmed by the user to execute a complex logic function is called

A. a multiplexer
B. a microprocessor
C. a programmable logic device
D. a ladder logic device
Term
B. sum-of-products
Definition
.
UNIT 5 EXAM
Which of the following is a form of Boolean expressions?

A. square-of-sums
B. sum-of-products
C. product-of-squares
D. difference-of-products
Term
B. Karnaugh mapping
Definition
.
UNIT 5 EXAM
An easy-to-use graphic method of simplifying Boolean expressions is

A. Boolean algebra
B. Karnaugh mapping
C. pie graphs
D. Boolean charts
Term
C. 8
Definition
.
UNIT 5 EXAM
The truth table for three variables has how many possible combinations?

A. 2
B. 4
C. 8
D. 16
Term
Definition
.
UNIT 5 EXAM
DeMorgan's theorem states that
Term
B. False
Definition
.
UNIT 5 EXAM
A PAL has a programmable AND array and a programmable OR array.

A. True
B. False
Term
B. False
Definition
.
UNIT 5 EXAM
When mapping an SOP expression using a Karnaugh map a 0 is placed in each cell corresponding to the value of the product term.

A. True
B. False
Term
A. Variable complements can be eliminated by using Karnaugh maps
and
B. Karnaugh maps provide a cookbook approach to simplifying Boolean expressions
Definition
.
UNIT 5 EXAM
Which statement below best describes a Karnaugh map?

A. Variable complements can be eliminated by using Karnaugh maps
B. Karnaugh maps provide a cookbook approach to simplifying Boolean expressions
C. A Karnaugh map can be used to replace Boolean rules
D. The Karnaugh map eliminates the need for using NAND and NOR gates
Term
Definition
.
UNIT 5 EXAM
Term
Definition
.
UNIT 5 EXAM
Term
Definition
.
UNIT 5 EXAM
Term
Definition
.
UNIT 5 EXAM
Term
A. converts an input to a code
Definition
.
UNIT 6 EXAM
An encoder:

A. converts an input to a code
B. converts a code into an input
C. converts an output into a code
D. converts a code into an output
Term
A. converts a code into an output
Definition
.
UNIT 6 EXAM
A decoder:

A. converts a code into an output
B. can be used as a multiplexer
C. both A and B
D. both B and C
Term
B. False
Definition
.
UNIT 6 EXAM
A decoder is an electronic device that translates from decimal to an encrypted code such as binary.

A. True
B. False
Term
B. False
Definition
.
UNIT 6 EXAM
If seven-segment displays need to show decimal digits 0 through 9, the hexadecimal code should be used.

A. True
B. False
Term
A. True
Definition
.
UNIT 6 EXAM
A very common output device used to display decimal numbers is the seven-segment display.

A. True
B. False
Term
A. True
Definition
.
UNIT 6 EXAM
Since the display driver is generally packaged in the same IC as a decoder, it often referred to as a seven-segment decoder/driver.

A. True
B. False
Term
C. blanking
Definition
.
UNIT 6 EXAM
The process of causing all LEDs on the display to remain unlit is called

A. blocking
B. blinking
C. blanking
D. blitzing
Term
B. decoder
Definition
.
UNIT 6 EXAM
A logic device that translates from an encrypted code into a code that is more understandable is the

A. encoder
B. decoder
C. modulator
D. encrypter
Term
D. parallel, serial
Definition
.
UNIT 6 EXAM
A multiplexer can change _____ data into _____ data.

A. digital, analog
B. analog, digital
C. serial, parallel
D. parallel, serial
Term
B. many, one
Definition
.
UNIT 6 EXAM
A multiplexer has _____ input(s) and _____ outputs(s).

A. one, many
B. many, one
C. digital, analog
D. analog, digital
Term
C. serial, parallel
Definition
.
UNIT 6 EXAM
A demultiplexer can change _____ data into _____ data.

A. digital, analog
B. analog, digital
C. serial, parallel
D. parallel, serial
Term
A. one, many
Definition
.
UNIT 6 EXAM
A demultiplexer has _____ input(s) and _____ output(s).

A. one, many
B. many, one
C. digital, analog
D. analog, digital
Term
C. flip-flops
Definition
.
UNIT 6 EXAM
What device is usually used in a counter for frequency division?

A. decoders
B. demultiplexers
C. flip-flops
D. encoders
Term
B. decoder
Definition
.
UNIT 6 EXAM
What type of logic device would be used to convert binary numbers into their decimal equivalent?

A. multiplexer
B. decoder
C. MOD 4 counter
D. encoder
Term
B. to drive a LED display
Definition
.
UNIT 6 EXAM
A seven-segment decoder is usually used:

A. to count to 7
B. to drive a LED display
C. to drive an octal circuit
D. in a counter circuit
Term
A. True
Definition
.
UNIT 6 EXAM
A BCD-to-decimal decoder can be classified as a 4-line to 10-line decoder.

A. True
B. False
Term
B. False
Definition
.
UNIT 6 EXAM
The function of a decoder is to break a decimal or other character code down into a binary code.

A. True
B. False
Term
A. True
Definition
.
UNIT 6 EXAM
Converting a decimal number into a binary number is an example of an encoder.

A. True
B. False
Term
B. 4
Definition
.
UNIT 6 EXAM
A 1-of-16 decoder IC has _____ data input connection(s).

A. 8
B. 4
C. 1
D. 16
Term
B. A decoder will convert a binary number into a specific output representing a particular character or digit.
Definition
.
UNIT 6 EXAM
Which statement below best describes the function of a decoder.

A. Decoders are used to prevent improper operation of digital systems
B. A decoder will convert a binary number into a specific output representing a particular character or digit.
C. Decoders are special ICs that are used to make it possible for one brand of computer to talk to another.
D. A decoder will convert a decimal number into the proper binary equivalent
Term
Definition
.
UNIT 6 EXAM
Term
Definition
.
UNIT 6 EXAM
Term
C. a visual representation of digital signals over time
Definition
.
UNIT 7 EXAM
A timing diagram is:

A. the same as a schematic
B. used to display binary numbers
C. a visual representation of digital signals over time
D. the same as a truth table
Term
A. how it's triggered
Definition
.
UNIT 7 EXAM
The difference between a D-latch and a D-flip-flop has to do with:

A. how it's triggered
B. how it's used
C. nothing, they're the same
D. none of the above
Term
A. has an added layer of feedback from the outputs
and
C. will toggle when both J-K are active and a clock signal occurs
Definition
.
UNIT 7 EXAM
A J-K flip flop:

A. has an added layer of feedback from the outputs
B. has three modes
C. will toggle when both J-K are active and a clock signal occurs
D. all of the above
Term
E. both B and C
Definition
.
UNIT 7 EXAM
Asynchronous inputs to flip-flops can be used to:

A. set or clear the flip-flop in sync with the clock
B. set or clear the flip-flop independent of the clock
C. load a preset number into a set of flip-flops
D. both A and C
E. both B and C
Term
A. True
Definition
.
UNIT 7 EXAM
Sequential logic circuits involve timing and memory.

A. True
B. False
Term
B. False
Definition
.
UNIT 7 EXAM
The basic building block for sequential logic is the logic gate.

A. True
B. False
Term
A. True
Definition
.
UNIT 7 EXAM
The clocked R-S flip-flop looks almost like an R-S latch except that it has one extra input labeled CLK.

A. True
B. False
Term
B. False
Definition
.
UNIT 7 EXAM
Asynchronous operation is important in most digital circuits where each step must happen in an exact order.

A. True
B. False
Term
A. True
Definition
.
UNIT 7 EXAM
The D flip-flop has only one data input and a clock input.

A. True
B. False
Term
B. False
Definition
.
UNIT 7 EXAM
When both data inputs J and K of a J-K flip-flop are at 1, repeated clock pulses cause the output to remain low.

A. True
B. False
Term
B. False
Definition
.
UNIT 7 EXAM
When the J and K inputs of a J-K flip-flop are both 0, the flip-flop is in the toggle mode.

A. True
B. False
Term
A. True
Definition
.
UNIT 7 EXAM
One use of a flip-flop is to hold, or latch data.

A. True
B. False
Term
A. in the hold mode
Definition
.
UNIT 7 EXAM
When the J and K inputs of a J-K flip-flop are both 0, the flip-flop is

A. in the hold mode
B. reset
C. set
D. toggling
Term
A. latch
Definition
.
UNIT 7 EXAM
A device that serves as a temporary buffer memory is called a

A. latch
B. counter
C. register
D. gate
Term
D. latch
Definition
.
UNIT 7 EXAM
The most fundamental memory device used in digital electronics is the

A. NAND gate
B. register
C. inverter
D. latch
Term
B. synchronous
Definition
.
UNIT 7 EXAM
Flip-flops that have a clock input are referred to as

A. registers
B. synchronous
C. asynchronous
D. combinational
Term
A. shows the triggering occurs on the negative-going edge of the clock
Definition
.
UNIT 7 EXAM
The invert bubble at the clock input of a D flip-flop

A. shows the triggering occurs on the negative-going edge of the clock
B. shows the triggering occurs on the positive-going edge of the clock
C. causes the clock signal to be 180 degrees out of phase
D. disables the clock signal
Term
B. >
Definition
.
UNIT 7 EXAM
What symbol is used inside the flip-flop logic symbol near the clock that says data are transferred to the output on the edge of the pulse?

A. #
B. >
C. <
D. &
Term
Definition
.
UNIT 7 EXAM
Term
Definition
.
UNIT 7 EXAM
Term
Definition
.
UNIT 7 EXAM
Term
Definition
.
UNIT 7 EXAM
Term
D. 8
Definition
.
UNIT 8 EXAM
A counter with three (3) flip-flops would have how many different states?

A. 4
B. 3
C. 16
D. 8
Term
C. 4
Definition
.
UNIT 8 EXAM
A counter with two (2) J-K flip-flops would be described as a MOD _____ circuit.

A. 2
B. 8
C. 4
D. 16
Term
C. N
Definition
.
UNIT 8 EXAM
To determine the count in a MOD-N counter you would use:

A. N+1
B. N-1
C. N
D. N^2
Term
C. flip-flops
Definition
.
UNIT 8 EXAM
What device is usually used in a counter for frequency division?

A. decoders
B. demultiplexers
C. flip-flops
D. encoders
Term
B. has the output of one flip-flop connected to the clock of the net flip-flop
Definition
.
UNIT 8 EXAM
A ripple counter:

A. has the output of one flip-flop connected to the input of the next flip-flop
B. has the output of one flip-flop connected to the clock of the next flip-flop
C. output of one flip-flop connected to the output of the next flip-flop
D. none of the above
Term
C. has a clock input going to each flip-flop
Definition
.
UNIT 8 EXAM
A synchronous counter:

A. doesn't use a clock input
B. has the clock input connected to the input of each flip-flop
C. has a clock input going to each flip-flop
D. all of the above
Term
D. up/down counter
Definition
.
UNIT 8 EXAM
A counter that can count both up and down is called a:

A. asynchronous counter
B. synchronous counter
C. Johnson counter
D. up/down counter
Term
C. uses D-type flip-flops
Definition
.
UNIT 8 EXAM
A Johnson counter:

A. counts in a binary sequence
B. can be used as a frequency divider
C. uses D-type flip-flops
D. both A and C
Term
C. the number of states it must go through to complete it's counting sequence
Definition
.
UNIT 8 EXAM
The modulus of a counter describes:

A. what mode it's running in
B. the number of bits in the counter
C. the number of states it must go through to complete it's counting sequence
D. all of the above
Term
A. True
Definition
.
UNIT 8 EXAM
The ripple and asynchronous labels mean that all the flip-flops of a counter do not trigger at one time.

A. True
B. False
Term
B. False
Definition
.
UNIT 8 EXAM
An asynchronous counter is one where all stages of the counter trigger together.

A. True
B. False
Term
B. False
Definition
.
UNIT 8 EXAM
When a down counter gets to 000 and recirculates it starts at 001.

A. True
B. False
Term
A. True
Definition
.
UNIT 8 EXAM
If a decade counter is connected in series with a mod-6 counter, the result will be a divide-by-60 circuit.

A. True
B. False
Term
A. True
Definition
.
UNIT 8 EXAM
The modulus of a counter is the number of different states the counter must go through to complete its counting cycle.

A. True
B. False
Term
C. serve as a seven-segment display
Definition
.
UNIT 8 EXAM
Which of the following is not performed by a counter?

A. count events
B. divide frequency
C. serve as a seven-segment display
D. serve as a memory unit
Term
C. 8
Definition
.
UNIT 8 EXAM
A mod-8 counter has how many different output states?

A. 2
B. 4
C. 8
D. 16
Term
B. 10
Definition
.
UNIT 8 EXAM
If a counter uses a NAND gate to clear all the flip-flops back to zero immediately after the 1001 count, what is the modulus?

A. 8
B. 10
C. 16
D. 32
Term
C. decade counter
Definition
.
UNIT 8 EXAM
A mod-10 counter is often referred to as a

A. octal counter
B. binary counter
C. decade counter
D. hexadecimal counter
Term
C. four
Definition
.
UNIT 8 EXAM
How many J-K flip-flops are needed to wire a mod-16 counter?

A. one
B. two
C. four
D. eight
Term
B. divide frequency
Definition
.
UNIT 8 EXAM
Counters are commonly used in digital clocks and frequency counters to

A. shape (square up) pulses
B. divide frequency
C. multiply frequency
D. subtract pulses
Term
B. RAM
Definition
.
UNIT 10 EXAM
A semiconductor read/write memory is commonly referred to as:

A. ROM
B. RAM
C. PROM
D. none of the above
Term
A. READ
Definition
.
UNIT 10 EXAM
To copy memory from a storage location is called a _____ operation.

A. READ
B. WRITE
C. READ/WRITE
D. CHIP ENABLE
Term
B. WRITE
Definition
.
UNIT 10 EXAM
To copy memory into a storage location is called a _____ operation.

A. READ
B. WRITE
C. READ/WRITE
D. CHIP ENABLE
Term
A. R/WM
Definition
.
UNIT 10 EXAM
Which of the following is volatile memory?

A. R/WM
B. ROM
C. PROM
D. EEPROM
Term
D. all of the above
Definition
.
UNIT 10 EXAM
Which of the following is non-volatile memory?

A. ROM
B. PROM
C. EEPROM
D. all of the above
E. none of the above
Term
A. needs to be constantly refreshed to retain it's data
Definition
.
UNIT 10 EXAM
DRAM:

A. needs to be constantly refreshed to retain it's data
B. is the same as SRAM
C. doesn't use address decoders
D. none of the above
Term
A. firmware
Definition
.
UNIT 10 EXAM
The computer _____ is used to describe programs that are permanently stored in ROM in a microcomputer system.

A. firmware
B. hardware
C. secureware
D. solidware
Term
B. manufacturer
Definition
.
UNIT 10 EXAM
The _____ performs the task of programming a MROM.

A. distributor
B. manufacturer
C. user
D. wholesale or retailer
Term
C. can be erased electrically
Definition
.
UNIT 10 EXAM
An EEPROM is a field programmable ROM that:

A. can be erased by turning off the power
B. can be erased by using ultraviolet light
C. can be erased electrically
D. cannot be erased
Term
A. SRAM
Definition
.
UNIT 10 EXAM
The _____ device has the fasted access time

A. SRAM
B. floppy disk
C. magnetic tape
D. compact disk
Term
C. connects data to the bus
and
D. isolates data from the bus
Definition
.
UNIT 10 EXAM
What is the function of a tri-state buffer? (choose all that apply).

A. stores data for later transfer to a bus
B. connects the clock line to the bus
C. connects data to the bus
D. isolates data from the bus
Term
B. is used as a buffer
and
C. is used as fast memory on microprocessors
and
D. is used for temporary data storage
Definition
.
UNIT 10 EXAM
Cache memory (choose all that apply):

A. stores data even when not powered
B. is used as a buffer
C. is used as fast memory on microprocessors
D. is used for temporary data storage
Term
A. DRAM
Definition
.
UNIT 10 EXAM
What memory type must be refreshed from time to time to renew its data?

A. DRAM
B. flash memory
C. EPROM
D. SRAM
Term
A. True
Definition
.
UNIT 10 EXAM
A tri-state output can be either low, high, or high impedance.

A. True
B. False
Term
B. False
Definition
.
UNIT 10 EXAM
Once the Gray code is programmed into a 7489 RAM it will remain even after the power is removed.

A. True
B. False
Term
B. False
Definition
.
UNIT 10 EXAM
ROM is a volatile memory.

A. True
B. False
Term
A. are classified as nonvolatile memories
Definition
.
UNIT 10 EXAM
ROMs

A. are classified as nonvolatile memories
B. are classified as volatile memories
C. lose their data when power is turned off
D. are used in only low-volume production applications
Term
C. firmware
Definition
.
UNIT 10 EXAM
When a computer program is stored in a ROM it is called

A. software
B. hardware
C. firmware
D. RAM
Term
C. 1042
Definition
.
UNIT 10 EXAM
Which of the following sizes would be unusual for a semiconductor memory?

A. 64
B. 256
C. 1042
D. 4096
Term
A. encoders
Definition
.
UNIT 10 EXAM
Which of the following is not an application of read-only memories?

A. encoders
B. look-up tables
C. accounting software
D. function generators
Term
C. EEPROM
and
D. EPROM
Definition
.
UNIT 10 EXAM
Which of the following can be erased and reprogrammed while on the circuit board?

A. PROM
B. RAM
C. EEPROM
D. EPROM
Term
B. high power consumption
Definition
.
UNIT 10 EXAM
Which of the following is not an advantage of flash memories?

A. nonvolatile
B. high power consumption
C. in-system rewritable
D. highly reliable
Term
A. bipolar RAM
Definition
.
UNIT 10 EXAM
Which of the following storage devices has the fastest access time?

A. bipolar RAM
B. floppy disk
C. magnetic tape
D. paper tape
Term
A. electrically
Definition
.
UNIT 10 EXAM
A flash EEPROM is erased

A. electrically
B. using ultraviolet light
C. using a magnetic wand
D. using infrared light
Term
C. access time
Definition
.
UNIT 10 EXAM
The time it takes to retrieve a piece of data from memory is called the

A. search time
B. write time
C. access time
D. propagation time
Term
B. False
Definition
.
UNIT 11 EXAM
The D/A converter converts analog information to digital data.

A. True
B. False
Term
A. True
Definition
.
UNIT 11 EXAM
A summing amplifier typically uses an IC unit called an operational amplifier.

A. True
B. False
Term
B. False
Definition
.
UNIT 11 EXAM
The gain of an op amp is easily set by the ratio of the input and load resistors.

A. True
B. False
Term
B. False
Definition
.
UNIT 11 EXAM
Digital-to-analog converters consist of a resistor network and a difference amplifier.

A. True
B. False
Term
A. True
Definition
.
UNIT 11 EXAM
A voltage comparator compares several voltages and determines which is the largest.

A. True
B. False
Term
A. True
Definition
.
UNIT 11 EXAM
A ramp generator always produces a sawtooth output waveform.

A. True
B. False
Term
A. True
Definition
.
UNIT 11 EXAM
A typical application for an A/D converter is in a digital voltmeter.

A. True
B. False
Term
A. True
Definition
.
UNIT 11 EXAM
An advantage of a ramp-type A/D converter is its speed in counting up to higher voltages.

A. True
B. False
Term
B. False
Definition
.
UNIT 11 EXAM
The resolution of an A/D converter is given as the number of bits at the output for a binary-type unit.

A. True
B. False
Term
C. ramp-approximation
Definition
.
UNIT 11 EXAM
Which of the following is not a type of A/D converter?

A. counter-ramp
B. ramp
C. ramp-approximation
D. successive-approximation
Term
A. type of input
Definition
.
UNIT 11 EXAM
Which of the following is not a common manufacturer specification of an A/D converter?

A. type of input
B. type of output
C. resolution
D. accuracy
Term
B. conversion time
Definition
.
UNIT 11 EXAM
The time it takes for the A/D IC to convert the analog input voltage to binary (or decimal) data at the outputs is called the

A. approximation time
B. conversion time
C. dissipation time
D. reversion time
Term
Definition
.
UNIT 11 EXAM
Term
C. digitize
Definition
.
UNIT 11 EXAM
To convert an analog measurement into digital units or digital pulses is to

A. minimize
B. analogize
C. digitize
D. maximize
Term
C. on-off switching
Definition
.
UNIT 11 EXAM
Which of the following is not analog in nature?

A. time
B. pressure
C. on-off switching
D. light intensity
Term
A. transducer
Definition
.
UNIT 11 EXAM
A device that converts one form of energy to another is called a

A. transducer
B. transistor
C. converter
D. transresistor
Term
C. resistor network and summing amplifier
Definition
.
UNIT 11 EXAM
A simple D/A converter consists of a(n)

A. encoder and decoder
B. op amp and two relays
C. resistor network and summing amplifier
D. scaling oscillator and decoder
Term
Definition
.
UNIT 11 EXAM
Term
D. successive-approximation
Definition
.
UNIT 11 EXAM
Which type A/D converter is the fastest unit?

A. counter-ramp
B. Karnaugh
C. ramp
D. successive-approximation
Term
successive approximation
Definition
.
UNIT 11 EXAM
A converter that cuts down on conversion time is a _____ A/D converter.
Term
A/D
Definition
.
UNIT 11 EXAM
The resolution of a(n) _____ converter is given as the number of bits at the output for a binary-type unit.
Term
resistor
Definition
.
UNIT 11 EXAM
A D/A converter consists of two section a(n) _____ network and a summing amplifier.
Term
summing
Definition
.
UNIT 11 EXAM
In a D/A converter, the _____ amplifier typically uses an IC unit called an operational amplifier.
Term
ratio
Definition
.
UNIT 11 EXAM
The gain of the operational amplifier is easily set by the _____ of the input and feedback resistors.
Term
ramp
Definition
.
UNIT 11 EXAM
In a ramp A/D converter, the _____ generator produces a sawtooth waveform.
Term
C. connects data to the bus
and
D. isolates data from the bus
Definition
.
UNIT 12 EXAM
What is the function of a tri-state buffer? (choose all that apply).

A. stores data for later transfer to a bus
B. connects the clock line to the bus
C. connects data to the bus
D. isolates data from the bus
Term
A. low
Definition
.
UNIT 12 EXAM
The bar over RES (reset) means that to reset the CPU the line must be driven:

A. low
B. high
C. tri-state
D. any of the above
Term
A. a serial data bus
Definition
.
UNIT 12 EXAM
Sequential data travels over one data line describes:

A. a serial data bus
B. a parallel-data bus
Term
A. parallel bus
Definition
.
UNIT 12 EXAM
This type of bus can transmit more than one bit at a time:

A. parallel bus
B. serial bus
Term
A. synchronous transmission
Definition
.
UNIT 12 EXAM
When using this type of data transmission, timing is important.

A. synchronous transmission
B. asynchronous transmission
Term
C. the reset line
Definition
.
UNIT 12 EXAM
To restart a powered microprocessor, you would use:

A. an address line
B. the write line
C. the reset line
D. an I/O line
Term
A. NMI
Definition
.
UNIT 12 EXAM
What type of interrupt cannot be ignored by a CPU?

A. NMI
B. INTR3
C. INTR2
D. INTR1
Term
A. memory
and
C. input/output
and
E. CPU
Definition
.
UNIT 12 EXAM
A modern system bus mode has as a minimum the following components (check all that are correct)

A. memory
B. flash memory
C. input/output
D. printer port
E. CPU
Term
B. a crystal
Definition
.
UNIT 12 EXAM
The frequency of the clock on a CPU is controlled by:

A. the address bus
B. a crystal
C. the control bus
D. the output lines
Term
B. False
Definition
.
UNIT 12 EXAM
The clock signal is only on when the CPU is reading or writing data.

A. True
B. False
Term
C. address bus
Definition
.
UNIT 12 EXAM
When reading or writing data, what bus line is used to tell the memory where a specific piece of data is to be written or read?

A. control bus
B. I/O bus
C. address bus
D. data bus
Term
D. both A and C
Definition
.
UNIT 12 EXAM
Which of the buses below is/are bidirectional?

A. data
B. address
C. control
D. both A and C
E. all of the above
Term
B. data
Definition
.
UNIT 12 EXAM
During a WRITE operation, this bus carries data from the MPU.

A. address
B. data
C. control
D. none of the above
Term
D. all of the above
Definition
.
UNIT 12 EXAM
Partial decoding:

A. doesn't use all of the address lines
B. minimizes decoding circuitry
C. is used when a uP doesn't use all its address space
D. all of the above
Term
B. WRITE
Definition
.
UNIT 12 EXAM
When an MPU transfers data from an internal MPU register to a RAM location for storage, it's called a _____ operation.

A. READ
B. WRITE
C. control
D. data
Term
C. $0000-$FFFF
Definition
.
UNIT 12 EXAM
A microprocessor has 64K of address locations so its memory map goes from:

A. $0000-$C000
B. $0000-$F000
C. $0000-$FFFF
D. none of the above
Term
A. True
Definition
.
UNIT 12 EXAM
A tri-state output can be either low, high, or high impedance.

A. True
B. False
Term
A. READ
Definition
.
UNIT 12 EXAM
To copy memory from a storage location is called a _____ operation.

A. READ
B. WRITE
C. READ/WRITE
D. CHIP ENABLE
Term
B. WRITE
Definition
.
UNIT 12 EXAM
To copy memory into a storage location is called a _____ operation.

A. READ
B. WRITE
C. READ/WRITE
D. CHIP ENABLE
Term
B. 16,384
Definition
.
UNIT 12 EXAM
A MPU has a 14 bit data bus. How many address points can it access?

A. 8,193
B. 16,384
C. 32,768
D. 65,536