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二、手机的基本电路构成 如同一般无线通信设备一样,移动通信手机虽小,其构成电路同样也包含无线收信、发射机、逻辑控制器、话音处理电路以及拨号,显示和电声转换装置等。从结构上看,手机多采用表面贴装技术(SMT)和超大规模集成电路。电路的基本构成为两块双面贴装的印刷电路板,分主、副机板。折叠式的面盖内装有受话器;开合盖与手机摘挂机开关联动。 功能电路方框图如图1所示。射频板含收信、发射机及频率合成器模块,数字板为逻辑控制与语音处理模块等。两块板通过连接器对接。天线为伸拉式。
Second, the basic structure of the phone as a general wireless communications equipment, mobile phones are small, the composition of the circuit also includes wireless receivers, transmitters, logic controllers, voice processing circuits and dial-up, display and electro-acoustic conversion devices . From a structural point of view, mobile phones use surface mount technology (SMT) and very large scale integrated circuits. The basic circuit consists of two printed circuit boards mounted on both sides, sub-main and sub-board. Fold the cover inside the receiver; opening and closing cover and mobile phone hook switch linkage. Functional circuit block diagram shown in Figure 1. RF board with the receiver, transmitter and frequency synthesizer module, digital board for logic control and voice processing module. Two boards docked through the connector. Antenna for the pull-style.