The mobile phone or cell phone as it is often called is equally important to the network in the operation of the complete cellular telecommunications network. Despite the huge numbers that are made, they still cost a significant amount to manufacture, discounts being offered to users as incentives to use a particular network. Their cost is a reflection of the complexity of the mobile phone electronics. They comprise several different areas of electronics, from radio frequency (RF) to signal processing, and general processing.
The design of a cell phone is particularly challenging. They need to offer high levels of performance, while being able to fit into a very small space, and in addition tot his the electronics circuitry needs to consume very little power so that the life between charges can be maintained.
Mobile phone contents
Mobile phones contain a large amount of circuitry, each of which is carefully designed to optimise its performance. The cell phone comprises analogue electronics as well as digital circuits ranging from processors to display and keypad electronics. A mobile phone typically consists of a single board, but within this there are a number of distinct functional areas, but designed to integrate to become a complete mobile phone:
Radio frequency - receiver and transmitter
Digital signal processing
Analogue / digital conversion
Control processor
SIM or USIM card
Power control and battery
Although mobile phones are one of the most commonplace pieces of electronics equipment these days, they are nevertheless complicated inside. An understanding of the mobile phone basics can often be useful when looking at the way a cellular network and cellular technology in general works.
What's Inside a Cellphone
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Oleh
Rachid Haddadi
