云闪定位系统中校正信号源设计

Design of calibration signal generator used in the cloud-lightning direction system

简要介绍了云闪探测系统的工作原理。为满足对系统中各通道幅相不一致性测试的需求,设计了一款精度高、稳定性好的信号源。该信号源以Altera公司FPGA芯片EP1C3T100为控制核心,以ADI公司DDS芯片AD9954为信号合成器。详细给出了信号源的硬件实现和高速逻辑控制电路设计,测试结果表明,该信号源性能良好,具有很好的应用和推广价值。

The principle of the cloud-lightning detection system is introduced. In order to meet the demand for measuring the amplitude and phase differences between channels of the system, the calibration signal generator with high precision and stability is designed, which is controlled by Ahera＇s FPGA chip EP1C3T100, and whose signal synthesizer is ADI＇s DDS chip AD9954. The hardware implementation and the design of the high-speed logic control circuit of the signal generator are described. Experimental results show that this generator has high performance. It has a good application and spread value.