The display and power attenuation control of bi-directional amplifier

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, PIC16f88 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, in order to meet concrete input signal requirements through the working condition of attenuation. IM4A5 chip is picked up to constitute the circuit of display. Software Quartus II is used to compile the procedures of displaying attenuation. It displays the change cases of attenuation that exported by SCM. It is suggested in this experiment that the design can meet the requirements of 0.5w output power by bi-directional amplifier in a certain range and display the value of attenuation.