Explanation of knowledge of working principle of a mobile phone

1. The mobile phone is divided into the following parts:

1, receive circuit: (antenna, antenna switch, antenna coupler, signal filter, power amplifier, signal demodulator, mixer, local oscillator, IF signal processor, low frequency signal processor, audio signal processor, tube. Horn)< /p > Explanation of knowledge of working principle of a mobile phone

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2. Transmission circuit: (transmitter, audio processor, same as above... transmission process, reverse of receiving circuit)

3. Power circuit: battery, power management IC) IC

4, logic circuit: single-chip microcomputer circuit, that is, CPU CPU, IC software chip,

5, display part: display, display cable, display processor.

Explanation of knowledge of working principle of a mobile phone

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Secondly, how a mobile phone works:

Turn on phone first, that is, wait until battery voltage reaches about 3.7V. At this time, when we have electricity, we press and hold power button to turn on mobile phone. After mobile phone is normal turns on, calling card we have inserted into mobile phone will be displayed on screen and enter network. state. At this time, we can communicate with others by dialing some numbers. If we need to go online, we simply turn on network data switch. This is understanding of ordinary people. If it is a professional, as I wrote above, our information is processed through a number of components. This process is more complex. Simply put, when we call someone, for example, voice that I speak with my mouth is entered through microphone, that is, microphone, and then sent to audio processor, and then to intermediate frequency processor, and so on. By analogy, send one level at a time until last message is sent to other side. All this is done by receive and transmit scheme described above.