嵌入式ADC电磁敏感度的温度效应分析与实验

发布时间：2018-03-25 08:02

  本文选题：电磁兼容　切入点：电磁敏感度　出处：《强激光与粒子束》2017年05期

【摘要】：模数转换器(ADC)在测控系统中应用广泛,针对嵌入式ADC复杂环境下的电磁敏感性问题,通过理论分析和实验测量研究了环境温度对其电磁敏感度的影响。结合ADC结构与特性,分析了射频信号对ADC的干扰机制,指出了环境温度对干扰信号作用下的金属氧化物半导体(MOS)漏电流的影响。在不同温度下,测量、分析了电磁干扰下各部分电路参数的变化情况。并在10 MHz~1 GHz频率范围、-10~80℃温度范围内测量了ADC电磁敏感度的温度效应。结果表明,变化的环境温度会通过影响MOS晶体管的迁移率,改变其在电磁干扰下的响应,造成ADC电磁敏感度随环境温度变化发生显著漂移。
[Abstract]:ADC is widely used in the measurement and control system. Aiming at the electromagnetic sensitivity of embedded ADC in complex environment, the influence of ambient temperature on its electromagnetic sensitivity is studied by theoretical analysis and experimental measurement, combining with the structure and characteristics of ADC. The interference mechanism of RF signal to ADC is analyzed, and the effect of ambient temperature on leakage current of metal oxide semiconductor MOSs under interference signal is pointed out. The variation of circuit parameters under electromagnetic interference is analyzed, and the temperature effect of electromagnetic sensitivity of ADC is measured in the temperature range of 10 MHz~1 GHz frequency range of -1080 鈩，

本文编号：1662232