阅读说明：本技术 一种信号放大电路及终端设备 (Signal amplification circuit and terminal equipment ) 是由 陈品辉 隆仲莹 曾伟才 杨怀毅 孙勇 占奇志 于 2018-12-12 设计创作，主要内容包括：一种信号放大电路及终端设备,通过信号放大电路中集成可调高增益定向天线(301),免去了TBOX与信号放大电路之间需要射频线缆连接的现状,提高性能的同时降低了成本及装配难度。所述信号放大电路包括：定向天线(301)、增益控制电路(302)和微处理器(303)；定向天线(301)与增益控制电路(302)相连,微处理器(303)与定向天线(301)相连,微处理器(303)与增益控制电路(302)相连；定向天线(301)用于接收车载通讯终端TBOX发送的上行信号,向TBOX发送下行信号；检测上行信号的信号强度和下行信号的信号强度；微处理器(303)用于根据上行信号的信号强度和下行信号的信号强度确定增益参数,根据增益参数向增益控制电路(302)发送增益指令；增益控制电路(302)用于根据增益指令进行信号的处理。(A signal amplification circuit and terminal equipment are provided, wherein a high-gain directional antenna (301) is integrated in the signal amplification circuit, the current situation that a radio frequency cable is required to be connected between a TBOX and the signal amplification circuit is avoided, the performance is improved, and the cost and the assembly difficulty are reduced. The signal amplification circuit includes: a directional antenna (301), a gain control circuit (302) and a microprocessor (303); the directional antenna (301) is connected with the gain control circuit (302), the microprocessor (303) is connected with the directional antenna (301), and the microprocessor (303) is connected with the gain control circuit (302); the directional antenna (301) is used for receiving an uplink signal sent by the vehicle-mounted communication terminal TBOX and sending a downlink signal to the TBOX; detecting the signal intensity of an uplink signal and the signal intensity of a downlink signal; the microprocessor (303) is used for determining a gain parameter according to the signal intensity of the uplink signal and the signal intensity of the downlink signal and sending a gain instruction to the gain control circuit (302) according to the gain parameter; the gain control circuit (302) is used for processing signals according to the gain instruction.)