A dedicated electrode driving ASIC for epidural spinal cord stimulation in rats

Conference paper (2013)

Authors

Vasiliki Giagka University College London
Clemens Eder University College London
V. Valente University College London
Anne Vanhoestenberghe University College London
Nick Donaldson University College London
Andreas Demosthenous University College London
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Published Date

01-01-2013

Language

English

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Abstract

This paper discusses the design of an application-specific integrated circuit (ASIC) suitable for mounting on a multi-electrode array for epidural spinal cord stimulation in rats. The ASIC acts as a demultiplexer, driving 12 electrodes on the array in any configuration. It is capable of routing biphasic constant current pulses of up to 1 mA to high impedance loads (with a maximum output voltage swing of approximately 25 V) and is small enough to be implanted into a rat's spinal column. Communication with its driver is achieved via 3 wires to minimize the number of interconnections. The circuit was implemented in a 0.18-μm high-voltage CMOS technology occupying a core area of 0.36 mm 2. Power dissipation is about 110 μW. Post-layout simulations are presented which show the correct operation of the system.