Cell phone internal structure

The internal structure of cell phone has evolved from the original single call function to the comprehensive evolution of voice, data, image, music and multimedia. Mobile terminals can basically be divided into two kinds: one is traditional cell phone (feature phone); the other is smart phone (smart phone). Smart phone has the basic functions of traditional cell phone, but also has the following characteristics: open operating system, hardware and software expandability, and support for the secondary development of the third party. Compared with traditional cell phones, smart phones are favored by people for their powerful functions and convenient operation, and have become a trend in the market.

1.1 Overall Structure of Smartphone

Smartphone can be regarded as a pocket computer. It has a processor, memory, input/output devices (keyboard, display, USB port, headphone port, camera, etc.) and I/O channels. The phone communicates with the base station via air interface protocols (e.g. GSM, CDMA, PHS, etc.) to transmit both voice and data.

The external structure of a smartphone is shown in Figure 1.

Opening the case of the cell phone and disassembling the circuit board and other components allows you to see the internal structure of the smartphone. Figure 2 shows the internal structure of the smartphone.

The main circuit board of the smartphone is the most important part of the phone, which is located in the interior of the smartphone and is connected to the components by data soft wires or contacts. The main circuit board can be said to be the core component of the phone, which is responsible for the input, output and processing of the phone signal, the sending of the phone signal, as well as the power supply and control of the whole machine. Figure 3 shows the main circuit board of a smartphone.