雷达信号处理机专用自动增益控制系统

In order to stabilize the the different signal amplitude receive by the radar signal processor, A design of automatic gain control circuit(AGC)dedicated to radar signal processor is proposed.Based on the analysis of AGC circuit theory and module, the key chip,variable gain amplifier (AD603), is used.The circuit is cascaded by two chips of AD603, which is formed as the core chip. And then use Multisim software to simulate the design of the circuit, and finally build a physical circuit model, using experiment to demonstrate. The results show that the circuit has almost no change of output voltage for different input voltage, which proves that the circuit has gain adjustment function, which shows the correctness of the circuit design.