This　paper　proposes　a　new　exponential　current　generation　circuit　design　for　neural　stimulation.　The　use　of　exponential　output　current　can　improve　the　power　efficiency.　The　proposed　exponential　current　generator　is　designed　based　on　the　Taylor　series　approximation,　which　can　produce　the　continuous-time　exponential　decaying　current　with　improved　dynamic　range　and　accuracy.　The　circuit　is　designed　based　on　180　nm　CMOS　process　in　Cadence.　Simulation　results　show　the　relative　error　is　smaller　than　1%　when　the　pulse　width　is　700　μs.　The　maximum　current　decaying　dynamic　ratio　of　the　stimulator　is　11.96　dB,　which　is　improved　by　2.3　times　compared　with　similar　neural　stimulators.　©　2021　IEEE.