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A Highly Compliant Current Driver for Electrical Stimulator with Compliance Monitor and Digital Controlled Offset Regulation Charge Balancing
Author(s)
Noorsal, Emilia
Date Issued
March 1, 2020
Type
Conference Paper
Abstract
A CMOS current driver for electrical stimulator in 0.35μm HVCMOS is presented in this paper. It is based on the regulated cascode current mirror in deep triode region. This driver requires approximately 500mV overdrive voltage over the current of 4μA to 1mA whereas maintaining output impedance higher than 10MΩ. The proposed topology also comes with the possibility to monitor the compliance voltage which is useful for the power-efficient adaptive supply voltage stimulation. Besides, the offset regulation active charge balancing is implemented using digitally controlled additional current sources. It is verified in vitro using a platinum black electrode in saline solution.
Citation
2020 8th International Electrical Engineering Congress Ieecon 2020, 2020