PNP输入双极运算放大器的辐射效应

Radiation Response of PNP Input Bipolar Operational Amplifiers

摘要: 对PNP输入双极运算放大器进行了不同偏置条件和不同剂量率下电离辐照实验。结果表明，高剂量率辐照时，正偏置条件下的偏置电流变化稍大于零偏置；低剂量率辐照时，正偏置下的偏置电流变化小于零偏置。两种PNP输入双极运算放大器均表现出明显的低剂量率辐照损伤增强（ELDRS）效应，且在零偏置下的低剂量率辐照损伤增强效应更显著。

Abstract: Ionizing radiation response of PNP input bipolar operational amplifiers was investigated at different biases and different dose rates. Results show that the change of bias currents at forward bias is greater than that at zero bias for high dose rate. While for low dose rate irradiation, the change of bias currents at forward bias is less than that at zero bias. Two types of PNP input bipolar operational amplifiers exhibit enhanced low dose rate sensitivity (ELDRS) obviously and the ELDRS is more significant at zero bias.