This study focuses on the ion species and energy dependence of the heavy ion SEE cross section in the sub-LET threshold region through a set of experimental data. In addition, a Monte Carlo based model is introduced and applied, showing a good agreement with the data in the several hundred MeV/n range while evidencing large discrepancies with the measurements in the 10-30 MeV/n interval, notably for the Ne ion. Such discrepancies are carefully analyzed and discussed. Abstract-This study focuses on the ion species and energy dependence of the heavy ion SEE cross section in the sub-LET threshold region through a set of experimental data. In addition, a Monte Carlo based model is introduced and applied, showing a good agreement with the data in the several hundred MeV/n range while evidencing large discrepancies with the measurements in the 10-30 MeV/n interval, notably for the Ne ion. Such discrepancies are carefully analyzed and discussed.

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A multiple-output stimulation ASIC for a peripherallyimplantable neurostimulaiton system was implemented in a 0.18µm CMOS process. The numbers of anodic outputs (NE A ) and cathodic outputs (NE C ) can be set between 1 and 8 with a fixed total output current up to 32.6mA, independent of NE A and NE C . Fast turn on technique was proposed for the stimulator to achieve a settling time of <5.8µs. The ASIC includes a power management unit and an electrode monitoring circuit, which consists of a 10-b ADC for monitoring the high voltage (~15V) stimulator outputs.