变温辐照对双极电压比较器LM2903在不同偏置状态下的单粒子瞬态影响

Effect of Temperature Switching Irradiation on Single Event Transient in Bipolar Voltage Comparator LM2903 under Different Bias States

摘要: 利用变温辐照方法模拟了低剂量率辐照，研究了双极电压比较器LM2903的电离总剂量（TID）-单粒子瞬态（SET）的协同效应。结果表明，高电平工作状态偏置时，TID对LM2903的SET具有抑制作用；低电平工作状态偏置时，TID对LM2903的SET具有促进作用。电离辐照诱发的界面态缺陷电荷是TID-SET协同效应产生的根本原因，电压比较器的输出级结构导致了偏置状态对TID-SET协同效应的不同影响。

Abstract: The synergistic effect of total ionizing dose (TID) and single event transient (SET) in bipolar voltage comparator LM2903 was studied by temperature switching irradiation method which can simulate low-dose-rate irradiation. The result shows that TID has a suppressing effect on the SET of LM2903 at the high-level working state for bias voltage, and TID can promote the SET of LM2903 at the low-level working state for bias voltage. The interface state defect charge induced by ionizing irradiation is the fundamental cause of the synergistic effect of TID-SET. The output stage structure of voltage comparator causes different effects of the bias state on the synergistic effect of TID-SET.