The most common radiation requirement in the aerospace design community is Total Ionizing Dose (TID), also known as total dose. Total dose effects can lead to degradation and/or device failure. When a transistor can switch from a low-conductance (off) state to a high-conductance (on) state as the gate voltage passes through a threshold, it is operating properly. Hindrances to this functionality include extended exposure to TID radiation and an increase in the leakage current.