DEFINITION OF MOBILE PHONE CIRCUIT

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Mobile PBA

A mobile phone circuit &  a normal circuit both are parallel or  same but  a little difference  is  there,  normally PCB (printed circuit board)& every  other components  which are fitted in a  normal PCB all are fixed  with the  whole, it  always  comes in single layer pcb means one side  where we can fit  component leg in the  pcb &  fix it to the  opposite side by solder wire ,PBA

But mobile phone circuits are of multilayer, and the mobile phone components are different from the general components of the normal circuit. Those components are known as surface mount device (SMD ). They can be mounted over the surface of the PCB,

The surface mount device means the components mount on the surface only. The components which are  soldered are  called PCB; there are  multiple layers with this too. That’s why it’s called multi-layer PCB, every mobile phone pcb are multilayer pcb. Now clear defiance between PCB and PBA.

Before the installation any component it’s called PCB (printed circuit Board).

After installation of components it’s called PBA (printed board assembly)

 The technique of utilizing SMD components it’s called SMT (Surface Mount Technology), the components of SMD are used  for several reasons  like low wait , saving space, the size of mobile phone has been significantly reduced due to using smd components . It also consumes  low current & works  low voltage, the voltage loss of this components is very low.

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