Today people live so fast that most people take things as if they had always been there, without stopping to analyze some The roughly how things look now but there are "daily", take for example the cell is a means of communication that has exploded among the population, this device will also serve as a means of communication, also provides us entertainment in many forms such as: playing music, games, camera and video, imaging both fixed and mobile, among others, but despite a large number of people own one, do any of them will know at least it works in broad strokes?, sometimes the fact that most people do not like to look into almost nothing being easier take things for granted to find a why? And that applies in all aspects of life, that is why we as engineers wanted to delve further operation of this device, the cell, and afford our curiosity and go to the root of the functioning of the cell, without further ado, to work.
So how do they work?
When making a call is a transfer from cell phone signals to a central follows: The phone sends a radio wave (waves emitted by television, radio and cellular) antenna station base that are sent to a switch. This plant is responsible for connecting the call to a fixed network (fixed phone) or another station to communicate with another cell. Communications networks in the mobile phone is divided into geographical regions called cells and each of these cells has a base station, so cell phones maintain a constant and uninterrupted connection.
So every time you think cell phone call in the process it takes to do, as seen action "simple" and "everyday" process leads to a not so simple.
cell contains different mechanisms to send and receive radio waves and to process various multimedia functions, text and Internet, mainly we find:
The main processor (which coordinates all the internal functions of the phone)
Reports (For storage of different temporary files the phone as well as the need for media files)
- Speaker and microphone
- Screen Keyboard Battery
- audio system
The receipt and sending data is via the main unit or microprocessor as shown in the block diagram.
Box U500 marked LV Magic can detect the signals it receives the cell phone and send them to the plant as well as modify the voice signal and vice versa. The boxes in gray and green are ancillary units of memory and signal detection. And all these elements enable the operation of our cell and thus have at our disposal an item of daily use.
Cell phones today can have people with disabilities have choices in your life and adapt to a world of high technology. An example is the development of cellular technology that operates on voice and movement. Examples have developed by Samsung Electronics that can recognize the movement, ie, the user can type the number in the air with the device in hand, it identifies and marks without pressing any button. This will also have applications for cell phones and the Mobile Accessibility is the name of a new application aimed at adapting the mobile phone user needs blind. This is a small program developed by Code Factory Mille. One of its main qualities is spoken menu, which guides the user through all the options on your handset, to manage calls, contacts, services, utilities, etc..
This concludes by recalling that the cell phone is a tool for everyday work leading electronic design and communications very large and great efforts must be taken into account.
Bibliographic Reference
Learn Electronics Collection No. 199
Year 18 No. 3
Pag 53 to 55
Very Interesting Year
XX No. 2 February 2003 p. 14
Very Interesting
Year XXII No. 3 March 2005 p. 92
Very Interesting Year
XX No. 5 July 2003 p. 14
Internet
http://www.pc-actual.com/Actualidad/Noticias/Inform% C3% A1tica_personal/Wireless/20030508017
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