A Versatile 8-Channel High Voltage Stimulator for Comprehensive Neural Stimulation

A dual-configuration dual-mode 8-channel high voltage stimulator is proposed and designed for biomedical applications. Dual-configuration indicates the choice between a bipolar or monopolar structural arrangement, while dual- =mode refers to the selection between constant current or constant voltage stimulation. With supply voltages of 1.8 V, ±5 V, ±10 V, and ±15 V, the range of stimulus current is ±0.2 mA to ±10 mA with a 0.2 mA/step increment, and the range of stimulus voltage is ±0.2 V to ±10 V with a 0.2 V/step increment. The 8-channel stimulator chip has been fabricated in a 0.18-µm BCD process with a silicon area of 3570 µm x 1636 µm. Moreover, stimulus functions have been successfully verified through experiments in agar with Pt electrodes and in-vivo animal test on pig with DBS electrode.