Abstract: Through different dose-rate switching evaluation methods,the radiation-response rules of operational amplifiers are studied when the irradiation dose rate is switched from high to low under different radiation temperatures and total doses.The experimental results indicate that the response characteristics could be affected by the switching total doses,irradiation temperatures,and dose rates individually or together.Accelerated evaluation on the ELDRS can be realized by adopting a proper dose-rate switching method.Meanwhile,the irradiation time can also be reduced.Finally,the mechanisms of the difference between various radiation responses are analyzed.

Key words: bipolar OP-amps,  60Co γ radiation,  switching dose rates,  accelerated evaluation