Abstract
This paper presents a current driver with a novel high voltage (HV) switch schematic for the use as a protective switch for recording circuits during the stimulation sequence. The current driver can source and sink currents of amplitudes up to ±8.2 mA with HV tolerance from 30 V up to 120 V. The mismatch between the sourced and sinked current does not exceed 20 μA. The inter pulse current is no more than 60 pA. The output HV compliance depends on the HV supply voltage with maximum value of the 120 V. The proposed HV switch also tolerates the voltage difference up to 120V between its terminals. The chip was fabricated with AMS HV 0.35 μm CMOS technology.
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