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4th Year Electrical > Electronics > Flashcards

Electronics Flashcards

(68 cards)

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1
Q

AND gate truth statement

A

Any low gives a low
A•B=Y

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2
Q

OR gate truth statement

A

Any high gives a high
A+B=Y

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3
Q

NAND gate truth statement

A

Any low gives a high
—-
A•B=Y

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4
Q

NOR gate truth statement

A

Any high gives a low
——
A+B=Y

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5
Q

NOT (inverter) gate truth statement

A

Output is opposite input
-
A=A

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6
Q

XOR gate truth statement

A

A or B, not both
- -
A•B + A•B=Y

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7
Q

The largest digit (figure) in a number system is always one (more/less) ________ than the base of that number system

A

Less

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8
Q

A straight binary number is always the same as a BCD number. (True/false)

A

False

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9
Q

What is the main outstanding feature of using ‘gray code’ for use with transducers?

A

Changes by one bit per position

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10
Q

What is ASCII used for?

A

Coding computer inputs into binary
De-coding it back so we can understand

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11
Q

When a flip-flop is preset it stores a binary __ (1 or 0)

A

1

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12
Q

To set or clear a flip-flop, must the signlas applied to the PR and CLR inputs be permanent?

A

No

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13
Q

Can a single flip-flop store more than one binary bit of data to Q?

A

No

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14
Q

Which is considered the primary output of a flip-flop;
-
Q or Q?

A

Q

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15
Q

When 1 is present at the Q output of a flip-flop, it is said to be in the _____ (set/reset) condition.

A

Set

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16
Q

Another term used for a flip-flop being in the clear condition is that it is ______ (set/reset).

A

Reset

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17
Q

By applying a low to the PR input the J-K flip-flop will be _____ (set/reset).

A

Set

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18
Q

By applying a low to the CLR input the J-K flip flop will be _____ (set/reset)

A

Reset

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19
Q

When J and K inputs are both 1, and an appropriate clock pulse occurs, what happens to the flip-flop’s Q input?

A

It changes

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20
Q

What gate is this?

A

AND gate

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21
Q

What gate is this?

A

OR gate

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22
Q

What gate is this?

A

NAND gate

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23
Q

What gate is this?

A

NOR gate

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24
Q

What gate is this?

A

NOR gate

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25
What gate is this?
NOT (inverter) gate
26
What gate is this?
XOR gate
27
What advantage does a DIP encased in ceramic have over one encased in plastic?
Heat regulation
28
Which is known for its faster switching speeds, TTL or CMOS?
TTL
29
Which logic family is known to be very sensitive to static electricity, TTL or CMOS?
CMOS
30
A floating input on TTL chips will act as if they are tied ________ (high/low)
High
31
For an AND gate should a floating (unused) input be tied high or low?
High
32
Should a floating (unused) input for an OR gate be tied high or low?
Low
33
How will a logic probe indicate the presence of a 1 when being used to troubleshoot digital circuits?
Red light (1) Green light (0)
34
What does IC stand for?
Integrated chip
35
What does DIP stand for?
Dual Inline Package
36
A logic probe receives its supply from an internal battery. (True/false)
False
37
A disadvantage with IC chips compared to discrete components is the large size. (True/false)
False
38
An IC is less reliable than a discrete circuit. (True/false)
False
39
Discrete circuits are more expensive than IC’s. (true/false)
True
40
IC’s can contain over a million transistors in less than one square inch. (True/false)
True
41
When comparing an open-loop op-amp to a closed-loop op-amp, which has the higher gain?
Open loop
42
How is the gain of an op-amp controlled?
Closed loop
43
What is the expected input impedance of the ideal op-amp?
High You want the input voltage to be amplified. If there were a low impedance path through the inputs there would be a volt drop and an incorrect input
44
What is the expected output impedance of the ideal op-amp?
Low Once the voltage has been amplified you want that voltage to be seen across the load
45
List two practical applications where you would find op-amps being used in real world equipment.
PLC’s VFD’s
46
What does OP-AMP stand for?
Operational amplifier
47
Is the following op-amp inverted or non inverted? What would be the equation to find gain?
Non inverted 50Kohm/1Kohm +1
48
Is the following op-amp inverted or non inverted? What would be the equation to find gain?
Inverted 27Kohm/3.3Kohm
49
An operational amplifier has two inputs. What are they called?
Inverting Non inverting
50
What is the difference between open-loop and closed-loop operation of an op-amp?
Open loop - no feedback, high gain, unstable Closed loop - feedback, low gain, stable
51
Not a question, just study this bitch
Yessir
52
List a reason for using negative feedback when operating an op-amp.
Controls the gain without distortion
53
What is the expected input impedance of an ideal op-amp?
High
54
What is the expected output impedance of an ideal op-amp?
Low
55
What type of power supply is used for an op-amp?
DC dual voltage with a center reference
56
What is the purpose of input S if R =0?
To set Q
57
What is the purpose of input R if S =0?
To reset Q
58
Q and Qnot are said to be ______.
Complimentary
59
Identify the clock signal that will trigger the F.F. (Leading or trailing edge)
Trailing edge
60
Identify the clock signal that will trigger the F.F. (Leading or trailing edge)
Leading edge
61
In order to set a JK F.F. to toggle mode: J= K=
J=1 K=1
62
What is the purpose of the inputs PR and CLR on a JK F.F.?
PR - To preset Q (Q=1) CLR - To clear Q (Q=0)
63
IC’s made of bipolar transistors are referred to as _____.
TTL
64
IC’s made of field effect transistors are referred to as ________.
CMOS
65
Which standard IC technology consumes more power but is faster? (TTL/CMOS)
TTL
66
Which IC (TTL/CMOS) could be damaged by a floating input?
CMOS
67
Should a logic probe be on pulse or memory when troubleshooting a circuit for high/low operation?
Pulse
68
Describe the propagation delay
The time it takes for an output to change in response to an input

4th Year Electrical (8 decks)

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