Everything2
Near Matches
Ignore Exact
Full Text
Everything2

CMOS Image sensor

created by trondgs

(thing) by trondgs (2 y) (print)   ?   (I like it!) Sun Mar 04 2001 at 17:07:17

The CMOS image sensor has the last few years evolved in to a competitor to the Charged Coupled Device. There are two basic designs of CMOS sensors, passive and active array.

The passive CMOS image sensor is basically just an array of photodiodes with a common amplifier for all diodes in a column. But since the photodiodes have a relatively low sensitivity to light, this system is sensitive to noise. This problem rises the further away the diode is from the amplifier.

In the active sensor a transistor is added to each diode, thus the signal is stronger and less susceptible to noise. But the addition of a transistor means that each sensor in the array becoms bigger and this causes the arrays resolution to fall. The CCD uses only one component and can be made with a higher density. But one big advantage with the CMOS is that it uses less power. This means a lower power drain on a portable device's power source. The technology to produce CMOS sensors has also fallen in price the last years. This has made the active CMOS image sensor a good choice in cheaper, low resolution, digital cameras.

As the technology behind this type of sensor advances, it will probably have a future in mobile devices.

printable version
chaos

MSGSRV32 charged coupled device Things I hate about being a conservative Republican System on Chip
CCD cold cathode CMOS Douglas Adams
DLL AMLCD Controlled explosion PLL
competitor Susceptible Tom Goes to the Mayor
Y'know, if you log in, you can write something here, or contact authors directly on the site. Create a New User if you don't already have an account.
  Epicenter
Login
Password

password reminder
register

Everything2 Help

Cool Staff Picks
The best nodes of all time:
Summer storm
Che Guevara
monster truck
The Myth of the Liberal Media
4'33"
The waterhammer
Good Friday
Stained Glass Primer
Restricting Childbirth
Persephone
Wannsee Conference
How to make a car last nearly forever
If I were watched alone, I'd be considered insane
New Writeups
antigravpussy
One fly amongst many(person)
sam512
Moon Base Shackleton, 1978(fiction)
Pavlovna
toy boy(person)
XWiz
tear jerker(review)
Heitah
Anarchy is Order(idea)
jessicaj
July 26, 2008(dream)
Berek
ABBA(person)
devolution
k-hole(place)
Nadine_2
The Sound Of Madness(review)
SwimmingMonkey
Conversations with Fo Fo, the Loneliest dog in Purgatory(fiction)
locke baron
lynx(thing)
Simulacron3
Reality, Dimensions and the Natural Ontology(essay)
SubSane
Making Love to a 9-Foot Woman(person)
Ouzo
Thoughts(idea)
antigravpussy
I fall silent, listening. The breadcrumbs are talking about us(person)
E2 is a by-product of the existence of The Everything Development Company