用于EMI测试的梳状源设计  

Comb Spectrum Generator Designed for EMI Test

作　　者：王雪 史锁兰 熊宇飞 陈天伟 周镒 Wang Xue;Shi Suolan;Xiong Yufei

机构地区：[1]中国信息通信研究院

出　　处：《安全与电磁兼容》2020年第5期101-103,109,共4页Safety & EMC

摘　　要：提出了一种基于FPGA的梳状信号发生装置,可用于传导骚扰测试系统的有效性验证。该梳状源利用FPGA的锁相环与计数器实现了稳定的窄脉宽周期性脉冲信号输出,并结合DA转换芯片产生模拟信号,可在150 kHz^30 MHz范围内实现频谱间隔可调的梳状谱。测试结果显示,该梳状源谱线间隔均匀稳定、谱线幅度平坦度约为5.2 dB,整体稳定性较好,能够满足EMI测试需求。The article presents a FPGA-based comb spectrum generator that can be used for system validation of conducted emission test.The comb spectrum generator uses FPGA resources such as phase-locked loops and counters to generate a stable narrowpulse width periodic pulse signal,and uses a DA conversion chip to output analog signals which can realize comb spectrum with adjustable spectrum interval in the range of 150 kHz^30 MHz.Test results show that the comb spectrum generator has uniform and stable spectral line spacing,and the spectral line amplitude flatness is about 5.2 dB.It has a satisfactory stability and can meet the requirements of EMI testing.

关 键 词：梳状谱 电磁兼容 数字脉冲信号 

分 类 号：TN03[电子电信—物理电子学]