| IP개요 |
Using the previous MagnaChip/SK Hynix CMOS 0.35 μm process, we designed a highly miniaturized neural stimulator that can generate adjustable biphasic current pulses. To stimulate a target neuron effectively, stimulation pulses are required to be biphasic and adjustable; charge balance of a target neuron during stimulation should be maintained not to damage it, which has a very different threshold level from those of other neurons. Nevertheless, conventional highly miniaturized neural stimulators developed in previous researches have limitations in that they generate only monophasic and invariable stimulation pulses inevitably to minimize their sizes. This is the reason why we designed a highly miniaturized neural stimulator generating adjustable biphasic current pulses. Overall size of the designed stimulator before was 306.1 μm x 290.1 μm, and it successfully operated in bench-top tests. However, there were a few problems in the designed stimulator on wireless power transmission. Therefore, using the same process, we wanted to design a test chip of the designed stimulator for further experiments. In this proposal, detailed explanation on the designed stimulator, simulation results, and evaluation methods of the designed stimulator is described. |
