摘要
双向放大器是远距离通信应用中专为扩展无线设备的工作范围而设计,根据不同系统需要,对双向放大器输出功率的要求也有所不同。该设计中双向放大器的输出要求为0.5w,为达到该指标,选用PIC16f88芯片构成双向放大器的自动增益控制电路,并运用MPLAB IDE软件编写自动输入电平检测及增益输出控制程序;同时根据衰减器的具体工作情况,采用IM4A5芯片构成数字显示电路,运用Quartus软件编写衰减值显示程序,通过该程序控制,可对输出的衰减控制信号的变化情况进行显示。实验表明,该设计能在一定范围内利用衰减器满足双向放大器的0.5w的输出功率要求,并对衰减器的衰减值进行显示,在实际应用中有较好的效果。
BDA is developed to expand the scope of wireless devices especially among long-distance application. According to the need of different systems, BDA output requirements are also various. The output request of BDA is 0.5w in this issue. In order to achieve the design specifications, PICI6f88 chip is selected to constitute an AGC amplifier circuit of BDA. The process of automatic input level detection and automatic gain control of the export are written by MPLAB IDE software. Meanwhile, according to concrete the working condition of attenuator. IM4A5 chip is adopted to constitute the circuit of display. Software Quartus II is used to compile the procedures of displaying attenuation, which displays the change cases of attenuation that exported by SCM. Experiment shows that the design can meet the requirements of 0.5w output power by hi-directional amplifier in a certain range and display the value of attenuation.
出处
《电气自动化》
2010年第1期73-75,共3页
Electrical Automation
关键词
双向放大器
衰减控制
衰减显示
功率输出
BDA attenuation control attenuation value display power output
