Total dose irradiation effects in the μA741 operational amplifier with different biases

Total dose dependence of bias current and offset voltage in the linear operational amplifier μA741 with different bias is presented in this paper. The experimental results show that the bias current in the μA741 with grounded bias is significantly affected by the degradation of the differential input transistors. In addition, the offset voltage is affected by the degradation of bipolar transistors of the current source in the differential input stage.