Gsm police based network identity of keyboard circuit board
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The invention relates to a keyboard circuit based on a global system for mobile communication (GSM) network for a police identity identifier. The circuit consists of a keyboard illumination light emitting diode (LED) circuit, a keyboard main board interface circuit, a key circuit, a GSM central processing unit (CPU) circuit, a memory circuit, an SIM (subscriber identity module) card circuit, a middle frequency circuit, a radio frequency power amplification circuit and a GSM antenna circuit, wherein the GSM antenna circuit is connected with the radio frequency power amplification circuit; the radio frequency power amplification circuit is connected with the middle frequency circuit; the GSM CPU circuit is connected with the memory circuit, the SIM card circuit and the keyboard main board interface circuit respectively; and the keyboard main board interface circuit is connected with the keyboard illumination LED circuit and the key circuit respectively. By utilizing the keyboard circuitbased on the GSM network, the problems that handheld equipment often realizes wireless communication by selecting modules and a handheld identity identifier is not provided with keys as usual can be solved; the keyboard circuit based on the GSM network for the police identity identifier is provided; and simultaneously, the whole volume of the keyboard circuit based on the GSM network is reduced by use of an onboard mode, and the keyboard circuit based on the GSM network is more convenient to carry.