# HV compliant current driver with on-chip read-out protection switch for neural stimulation

HV compliant current driver with on-chip read-out protection switch for neural stimulation 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 in neural measurement system. The current driver can source and sink currents of amplitudes up to ±8.2 mA with a HV tolerance from 30 V up to 120 V. The proposed HV switch also tolerates the voltage difference up to 120 V between its terminals. Between stimulation sequences the driver provides the effective isolation of the stimulation electrode from ground and HV supply voltage. The inter pulse current is no more than 60 pA. The chip was fabricated with AMS HV 0.35  $$\mu$$ μ m CMOS technology. For test purposes the complete stimulation system including the proposed chip and the external C8051F410 controller was build. For the proposed system the mismatch between the sourced and sinked current does not exceed 20  $$\mu$$ μ A. The possibility to stimulate with frequencies up to 1 kHz is proven by measurement along with the electrode-tissue model. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Analog Integrated Circuits and Signal Processing Springer Journals

# HV compliant current driver with on-chip read-out protection switch for neural stimulation

12 pages

Publisher
Springer US
Subject
Engineering; Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing
ISSN
0925-1030
eISSN
1573-1979
D.O.I.
10.1007/s10470-017-1022-3
Publisher site
See Article on Publisher Site

### 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 in neural measurement system. The current driver can source and sink currents of amplitudes up to ±8.2 mA with a HV tolerance from 30 V up to 120 V. The proposed HV switch also tolerates the voltage difference up to 120 V between its terminals. Between stimulation sequences the driver provides the effective isolation of the stimulation electrode from ground and HV supply voltage. The inter pulse current is no more than 60 pA. The chip was fabricated with AMS HV 0.35  $$\mu$$ μ m CMOS technology. For test purposes the complete stimulation system including the proposed chip and the external C8051F410 controller was build. For the proposed system the mismatch between the sourced and sinked current does not exceed 20  $$\mu$$ μ A. The possibility to stimulate with frequencies up to 1 kHz is proven by measurement along with the electrode-tissue model.

### Journal

Published: Jul 3, 2017

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