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TM112: Block 2 > Part 3, Mobile phones and how we use them > Flashcards

Part 3, Mobile phones and how we use them Flashcards

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1
Q

what is phubbing

A

It is the act of ignoring your partner in order to pay attention to your phone

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2
Q

some other challenges may be

  1. weather such as thick and thundery clouds where signal can be interfered or reflected
  2. overload or outage - such as to many users on a network or a base station broken or being out of service
A

excluding urban and countryside challenges what else might restrict signal coverage

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3
Q

If an image sensor has 2560 columns and 1920 rows of pixel sensors what size will the image be

A

if an image is 2560 X 1920 pixels how many pixel senors did the image sensor have

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4
Q

is the total amount of pixels in the image, found by multiplying both quantities of pixels together

A

what is the resolution of an image

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5
Q

Its data rate is from several Mbps to several hundred Mbps

A

what is the data rate of wi-fi direct

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6
Q

what is a Digital signal processor (DSP)

A

this takes digital information such as audio, video, pressure or position and manipulates it so that it can be displayed analysed or converted into a different type of signal

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7
Q

Its indoor range is tens of metres although an outdoor range can be several times higher

A

what is the range of wi-fi direct

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8
Q

the most common type used today is

active pixel sensor (APS)

A

what is the most common type of image sensor used today

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9
Q

what is an image sensor

A

this is the heart of a smartphone camera and is what enables the capturing of light into an image

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10
Q

what are active pixel sensor (APS) image sensors made from

A

these are made from

complementary metal oxide semiconductor (CMOS)

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11
Q

explain briefly how accelerometers work in mobile phones

A

these work by having a mass levitated above a silicon chip by springs. When a force is applied the mass moves in the opposite direction. The mass will have a finger that lies between two other fingers that are connected to the silicon chip by measuring the capacitance between the fingers its possible to know the direction.

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12
Q

inside this you may find

  1. Central processing unit (CPU)

2. Graphics processing unit (GPU)

3. Digital signal processor (DSP)

A

what three components might you find on a system on a chip

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13
Q

what security does bluetooth use

A

This uses encryption as well as a pairing process which involves the same pin being entered by each device before transmission

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14
Q

this can convert light into a electrical current

A

what is the job of the photodiode within a pixel sensor

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15
Q

what is a typical data rate of bluetooth

A

this has a typical data rate of 24 Mbps

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16
Q

what is a system in a package

A

this is a single chip that will contain various processors, memory and possibly hardware such as radio frequency (RF) transcievers

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17
Q

what is a pixel sensor made up of

A

this is made up of a photodiode

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18
Q

these allow for a point to point or peer to peer connection

A

what does wi-fi direct, bluetooth and NFC allow for

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19
Q

what is the name given to the type of gyroscope that is built into todays phones

A

this uses an MEM sensor of type Coriolis vibratory gyroscope (CVG)

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20
Q

what security does NFC use

A

This has no encryption built in and so to mitigate eavesdropping the devices must operate in as close proximity as possible

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21
Q

what is the range of NFC

A

Its range is a few centimetres

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22
Q

where was the name bluetooth derived from

A

Its name is derived from king harald bluetooth who united Scandinavians. As the engineers who worked on bluetooth wanted to unite pc and cellular industries with a short range wireless link

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23
Q

these are made from

complementary metal oxide semiconductor (CMOS)

A

what are active pixel sensor (APS) image sensors made from

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24
Q

what are Micro-electro-mechanical sensors (MEMS)

A

these are tiny sensors that are made of tiny moving parts and etched onto silicon chips. They are used to detect some kind of physical property and translate the change into an electrical signal

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25
It is the act of ignoring your partner in order to pay attention to your phone
what is **phubbing**
26
these work by allowing pressure from a finger to connect two thin conducting layers and in turn causing a change in electrical resistance at that point and so a touch can be detected. (note this type of touchscreen can work with gloves on)
explain how **resistive touch screens** work
27
what three components might you find on a **system on a chip**
inside this you may find 1. **Central processing unit (CPU)** **2.** **Graphics processing unit (GPU)** **3. Digital signal processor (DSP)**
28
what is the **resolution** of an image
is the total amount of pixels in the image, found by multiplying both quantities of pixels together
29
what is the data rate of **wi-fi direct**
Its data rate is from several Mbps to several hundred Mbps
30
this has a typical data rate of 424kbps
what is the typical data rate of **NFC**
31
this takes digital information such as audio, video, pressure or position and manipulates it so that it can be displayed analysed or converted into a different type of signal
what is a **Digital signal processor (DSP)**
32
what is the range of wi-fi direct
Its indoor range is tens of metres although an outdoor range can be several times higher
33
This has no encryption built in and so to mitigate eavesdropping the devices must operate in as close proximity as possible
what security does **NFC** use
34
these are used to detect acceleration or a change in velocity (velocity being a speed in a given direction). this therefore enables the detection of tilting shaking and other motion gestures
what are **MEMS accelerometer** used for
35
if an image is 2560 X 1920 pixels how many pixel senors did the image sensor have
If an image sensor has 2560 columns and 1920 rows of pixel sensors what size will the image be
36
1. Reducing the power or turning of high power draining components 2. Operating system with better power management
what two ways can a battery be used more efficiently
37
what is an **image sensor** made up of
this is made up of **pixel sensors**
38
this uses wi-fi protected access 2 (WPA2) for encryption and authentication
what does **wi-fi direct** use as security
39
what is the job of the **photodiode** within a pixel sensor
this can convert light into a electrical current
40
this stands for **complementary metal oxide semiconductor active pixel sensor image sensor**
what does **CMOS APS image sensor** stand for
41
challenges include 1. weak signal due to less infrastructure 2. natuarl features blocking signals such as rocks and hills
what are some challenges regarding coverage in the **countryside**
42
what is a **Analogue-to-digital converter (ADC)** used for
this converts analogue signals to digital signals
43
what two ways can you reduce the charge time of a battery
1. Using catalyst to speed up the chemical reaction (usually involves precious metals so is expensive) 2. Using nanotechnology to increase the surface area of the material in turn speeding up the chemical reaction
44
challenges include 1. deadspots due to buildings or thick or metal walls 2. signal jamming by an owner
what are some challenges regarding mobile signal coverage in urban ares
45
Its range is a few centimetres
what is the range of NFC
46
what is a typical range of **bluetooth**
This has a typical range of 10 metres
47
these work by having a mass levitated above a silicon chip by springs. When a force is applied the mass moves in the opposite direction. The mass will have a finger that lies between two other fingers that are connected to the silicon chip by measuring the capacitance between the fingers its possible to know the direction.
explain briefly how **accelerometers** work in mobile phones
48
name as many **components of a smartphone** as you can
49
to perform this operation it uses 1. **Analogue-to-digital converter (ADC)** 2. **Digital-to-analogue converter (DAC)**
what two components does a smartphone use to **convert analouge signals to digital signals and vice versa**
50
excluding urban and countryside challenges what else might restrict signal coverage
some other challenges may be 1. weather such as thick and thundery clouds where signal can be interfered or reflected 2. overload or outage - such as to many users on a network or a base station broken or being out of service
51
what are some challenges regarding coverage in the **countryside**
challenges include 1. weak signal due to less infrastructure 2. natuarl features blocking signals such as rocks and hills
52
the need for this comes because they now have more functionality
why is there a need for an **operating system on a smartphone**
53
these are tiny sensors that are made of tiny moving parts and etched onto silicon chips. They are used to detect some kind of physical property and translate the change into an electrical signal
what are **Micro-electro-mechanical sensors (MEMS)**
54
what does wi-fi direct, bluetooth and NFC allow for
these allow for a point to point or peer to peer connection
55
what two components does a smartphone use to **convert analouge signals to digital signals and vice versa**
to perform this operation it uses 1. **Analogue-to-digital converter (ADC)** 2. **Digital-to-analogue converter (DAC)**
56
what is **inertia**
this is the resistance of a mass to a change in its current direction
57
name as many **components of a smartphone** as you can
58
what is a typical size of an **image sensor**
the typical size of this is 11mm x 8mm
59
this is made up of **pixel sensors**
what is an **image sensor** made up of
60
This uses encryption as well as a pairing process which involves the same pin being entered by each device before transmission
what security does **bluetooth** use
61
explain how **resistive touch screens** work
these work by allowing pressure from a finger to connect two thin conducting layers and in turn causing a change in electrical resistance at that point and so a touch can be detected. (note this type of touchscreen can work with gloves on)
62
how can a **smartphone** be described
this could be described as a device that shares many features of a desktop computer such as 1. access to internet 2. operating system 3. subsytsems that carry out particular tasks
63
this can be found by dividing both pixel quantities by the same amount
what is the **aspect ratio**
64
brifly explain how **Coriolis vibratory gyroscope (CVG)** works
It works by having a MEM fixed to a free spinning disc. When the phone is tilted or rotated it is able to measure a force known as Coriolis force
65
explain briefly how a **capactive touch screen** works
this involves having two thin layers of glass with a conductive material such as **indium tin oxide (ITO)** placed as thin lines on each peice of glass note the lines are placed parallel to each other forming a grid. The lines are charged and when you press with your finger some of that charge is passed to your finger. Software can then detect the voltage drop and detect where the screen was touched
66
it produces coloured images by closely packaging together three pixel sensors which each have a different colour filter (red, green, blue). the three pixel senors then act as one pixel and produce any colour by combining the intensitys of each colour that was filtered
how does an image sensor produce couloured images
67
this could be described as a device that shares many features of a desktop computer such as 1. access to internet 2. operating system 3. subsytsems that carry out particular tasks
how can a **smartphone** be described
68
what two ways can a battery be used more efficiently
1. Reducing the power or turning of high power draining components 2. Operating system with better power management
69
what is the most common type of **image sensor** used today
the most common type used today is ## Footnote **active pixel sensor (APS)**
70
this is a single chip that will contain various processors, memory and possibly hardware such as radio frequency (RF) transcievers
what is a **system in a package**
71
what is a **system on a chip**
this is a single chip that will contain components such as processors
72
what are some challenges regarding mobile signal coverage in urban ares
challenges include 1. deadspots due to buildings or thick or metal walls 2. signal jamming by an owner
73
this is a single chip that will contain components such as processors
what is a **system on a chip**
74
what does **wi-fi direct** use as security
this uses wi-fi protected access 2 (WPA2) for encryption and authentication
75
this is a technique that is used to try and improve reception in dead spots. They are basically small base stations that provide a radio interface and connect users to mobile networks via a broadband connection
what is a **femtocell**
76
this converts digital signals into analogue signals
what is a **Digital-to-analogue converter (DAC)**
77
the typical size of this is 11mm x 8mm
what is a typical size of an **image sensor**
78
what is a **Digital-to-analogue converter (DAC)**
this converts digital signals into analogue signals
79
this is the resistance of a mass to a change in its current direction
what is **inertia**
80
what does **CMOS APS image sensor** stand for
this stands for **complementary metal oxide semiconductor active pixel sensor image sensor**
81
what is the typical data rate of **NFC**
this has a typical data rate of 424kbps
82
this converts analogue signals to digital signals
what is a **Analogue-to-digital converter (ADC)** used for
83
how does an image sensor produce couloured images
it produces coloured images by closely packaging together three pixel sensors which each have a different colour filter (red, green, blue). the three pixel senors then act as one pixel and produce any colour by combining the intensitys of each colour that was filtered
84
what is the **aspect ratio**
this can be found by dividing both pixel quantities by the same amount
85
this is the heart of a smartphone camera and is what enables the capturing of light into an image
what is an **image sensor**
86
It works by having a MEM fixed to a free spinning disc. When the phone is tilted or rotated it is able to measure a force known as Coriolis force
brifly explain how **Coriolis vibratory gyroscope (CVG)** works
87
why is there a need for an **operating system on a smartphone**
the need for this comes because they now have more functionality
88
what is a **femtocell**
this is a technique that is used to try and improve reception in dead spots. They are basically small base stations that provide a radio interface and connect users to mobile networks via a broadband connection
89
1. Using catalyst to speed up the chemical reaction (usually involves precious metals so is expensive) 2. Using nanotechnology to increase the surface area of the material in turn speeding up the chemical reaction
what two ways can you reduce the charge time of a battery
90
this involves having two thin layers of glass with a conductive material such as **indium tin oxide (ITO)** placed as thin lines on each peice of glass note the lines are placed parallel to each other forming a grid. The lines are charged and when you press with your finger some of that charge is passed to your finger. Software can then detect the voltage drop and detect where the screen was touched
explain briefly how a **capactive touch screen** works
91
this has a typical data rate of 24 Mbps
what is a typical data rate of **bluetooth**
92
This has a typical range of 10 metres
what is a typical range of **bluetooth**
93
this is made up of a **photodiode**
what is a **pixel sensor** made up of
94
this uses an MEM sensor of type **Coriolis vibratory gyroscope (CVG)**
what is the name given to the type of **gyroscope** that is built into todays phones
95
what are **MEMS accelerometer** used for
these are used to detect acceleration or a change in velocity (velocity being a speed in a given direction). this therefore enables the detection of tilting shaking and other motion gestures
96
Its name is derived from king harald bluetooth who united Scandinavians. As the engineers who worked on bluetooth wanted to unite pc and cellular industries with a short range wireless link
where was the name **bluetooth** derived from

TM112: Block 2 (7 decks)

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