Year 4 Logic Gates

Front 1

First 5 digits of binary

Back 1

16, 8, 4, 2, 1 double for each digit

Front 2

How to Demorganize

Back 2

Inverse the inputs and output, change the operator

Front 3

Another name for a NOT gate is an ____ gate

Back 3

Inverter

Front 4

5 main gates

Back 4

And, Or, Nand, Nor, Not

Front 5

Boolean algebra assumes that variables have how many states?

Back 5

2 states

Front 6

How many different types of codes are used in computers, PLC's, etc?

Back 6

Greater than 4

Front 7

Name the 4 common flip-flops

Back 7

R-S Flip Flop

Clocked R-S Flip Flop

D type Flip Flop

J-K Flip Flop

Front 8

Which Flip Flop is commonly referred to as a latch?

Back 8

R-S type

Front 9

For an R-S Flip Flop made from NOR gates, what are outputs Q and -Q when S=O and R=1?

Back 9

Q=0 -Q=1

Front 10

For an R-S Flip Flop made of NAND gates, what S and R inputs put the outputs in memory condition?

Back 10

R=1 S=1

Front 11

What statement sums up the operation of the D-type flip flop?

Back 11

Q follows D on the arrival of the clock

Front 12

What must the J and K inputs be for the J-K flip flop to operate in toggle mode?

Back 12

J=1 K=1

Front 13

Consider the clock frequency input to a J-K flip flop (in toggle mode) is 5000 Hz. What is the output frequency?

Back 13

2500 Hz

Front 14

3 forms of Multivibrators?

Back 14

Astable, Monostable, Bistable

Front 15

Which multivibrator does not require an input signal in order to function?

Back 15

Astable

Front 16

What determines the output frequency of an astable multivibrator?

Back 16

The values of externally connected capacitor and resistor group

Front 17

Which multivibrator is also called a one shot?

Back 17

Monostable

Front 18

What is the formula for the duration of a pulse (T) in seconds? "Multivibrator"

Back 18

T = 1.1×RC

Front 19

What devices form the building blocks for counters and shift registers?

Back 19

Flip- Flops

Front 20

What is meant by the MODULUS of a counter?

Back 20

Number of different states it goes through to complete its counting cycle

Front 21

What is the modulus of a binary ripple counter that has 5 flip flops?

Back 21

32 (11111) counting 0

Front 22

Why is it necessary to have a CLEAR input in an up counter?

Back 22

Because all flip-flops must be cleared, or reset to zero before the count starts

Front 23

What is the difference between the up and down binary ripple counters?

Back 23

-Down counter flip flops get clock signal from -Q output of the previous flip flop

-Up counter flip flops get clock signal from Q output

Front 24

A multiplexer is the electronic equivalent of what kind of mechanical switch?

Back 24

Selector Switch

Front 25

If an unused input of a TTL gate is left floating, what will happen?

Back 25

It will stay at 1

Front 26

If an unused input of a CMOS is left floating, what may happen?

Back 26

May create excessive temp rise which could cause the gates destruction

Front 27

Which of the 2 logic families has a faster switching speed?

Back 27

TTL

Front 28

Which type of IC package is now becoming obsolete?

Back 28

Metal Can type

Front 29

Prior to the introduction of the integrated circuit, electronic circuits were made using ____ components

Back 29

Discrete

Front 30

2 categories of IC's?

Back 30

Digital (Logic)

Linear (Analogue)

Front 31

TTL logic family uses ___ transistors, and the CMOS family uses ___ transistors

Back 31

Bipolar, Field-Effect

Front 32

Which logic fam is noted for its low power draw?

Back 32

CMOS

Front 33

If either LED on a logic probe is lighting dimly, what does it suggest?

Back 33

Logic level is in the undefined region

Front 34

What is the purpose of the yellow LED associated with the PULSE/MEM selector switch?

Back 34

To detect a rise or fall of a pulse (indicates rectangular/square wave signal

Front 35

What is a logic pulser used for?

Back 35

To inject a digital 1 or 0 into a point on a cct

Front 36

Can Digital voltmeters only measure pulse voltages?

Back 36

False

Front 37

What quantities can the oscilloscope measure?

Back 37

Voltage and Frequency

Front 38

What advantage does an oscilloscope have over a digital voltmeter?

Back 38

Waveform appears on a screen

Front 39

Most common op-amp package?

Back 39

Plastic Dip (Dual-Inline package)

Front 40

The power rating of a typical op-amp is about _____

Back 40

300 mW

Front 41

When comparing the op-amp in open-loop and closed-loop modes, which has the higher gain?

Back 41

Open loop gain is higher

Front 42

How is the gain of the op-amp controlled?

Back 42

With external resistors

Front 43

In a differential amplifier, what is amplified?

Back 43

The difference between 2 input signals

Front 44

What are the names of the input signals in the op-amp comparator?

Back 44

-Fixed reference voltage

-Feedback voltage

Front 45

The output voltage of the op-amp comparator reaches what magnitude?

Back 45

Power supply voltage (Saturation) level

Front 46

In the op-amp voltage-follower, the output compared with the input is ___ and ___

Back 46

Identical, In-Phase

Front 47

The voltage follower is often used as a ___ device between a ___ impedance source and a ___ impedance load

Back 47

Buffer, high, low