The CMOS operational amplifiers LF7650 were subjected to irradiation by 60Co rays
1MeV electrons and protons of 4
7 and 30MeV
respectively
and theradiation responses under these irradiation conditions were studied. The annealingmeasurements were also performed on the radiation damage caused by 60Co raysand 1MeV electrons at room temperature and 100 respectively. The reason whydifferent rays (in species and energies) cause different responses was discussed
andan explanation was given to the difference in response characteristics betweenCMOS analogue and digital circuits.