Cell Phone Basic Theory

i would like to introduce you about cell phone basics and the very basic techniques with the cell phone works.  while beginning to the main technology of cell phones you should know about the basic sections of a mobile phone. A conventional mobile phone contains three main sections prescribed as under.

1. Radio Section
2. Power section
3. computer section 

Radio section 

  A radio section is based on two main Circuits.

• Transmitter 
• Reciever 

  A simple mobile phone uses these two circuits to correspond to an other mobile phone. A Transmitter is a circuit or device which is used to transmit radio signals in the air.and a reciever is simply like radios which are used to recieve transmissions(Radiation) which is spread in the air by any transmitter on a specific frequency.

  The two way communication is made possible by setting two transmitters and two recievers sycronized in this form that a trasmitter in a cell phone is syncronised with the frequency of other cell phone's recieving frequency same like the transmitter of second cell phone is syncronised with the recieving frequency of first cell phone. So first cell phone transmits its radiation in the air while the other phone listens it and same process is present in the opposit side. so these hand held two cell phones correspond to one another.
   

Power Section

 A power section in mobile phones is designed to handle energy matters that is cosumed in mobile phones.There are two main sub sections in a single power section.

• Power Distribution and switching section 
• Charging Section 

  A power distribution section is designed to distribute electricity to the other sections of a phone. this section takes power from a battery (which is figured commonly 3.6 Volts)and in some places it is steped down to various volts like 2.8 V 1.8V 1.6V etc.while on other place it also steps up the voltage like 4.8 V. this section is commonly designed around a power IC(and integrated circuit) which is used to distribut and regulate the voltage used in other components.

  The Charging section is based on a charging IC which takes power from an external source and gives it to battery to make it again power up when it is exausted.this section uses conventiolly 6.4 V from an external battery charger and regulates it to 5.8V wile giving it to battery. The battery is made charged by this process and it is ready to use for the next session.

Computer Section

  a computer section is used in mobile phones to handle decision making applications like making decision the phone should be power on when its power switch is pressed down one time and on the other time the phone should be powered off. this section is commonly based on around three main components

• RAM( Random Access Memory) 
• ROM,Flash(Read Only Memory 
• CPU( Centeral Processing Unit) 

The very first part is a memory component which commonly saves in it self user defined setting of a phone and contacts Numbers. the informations in this memory chip is editable by user easily

The second Component contains mobile phone's operating system which is not editable bye user but it is only in special conditions
The Third Compnent is as like a simple brain used to understand differnet situations ad to make decisions and to hold control on other components as well as sections