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

Author

Giagka, Vasiliki ; Eder, Clemens ; Valente, Virgilio ; Vanhoestenberghe, Anne ; Donaldson, Nick ; Demosthenous, Andreas

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. London, London, UK

fYear

2013

fDate

8-11 Dec. 2013

Firstpage

469

Lastpage

472

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 mm². Power dissipation is about 110 μW. Post-layout simulations are presented which show the correct operation of the system.

Keywords

CMOS integrated circuits; application specific integrated circuits; biomedical electrodes; neuromuscular stimulation; application-specific integrated circuit; biphasic constant current pulse routing; current 1 mA; demultiplexer; epidural spinal cord stimulation; high-voltage CMOS technology; impedance loads; maximum output voltage swing; multielectrode array; post-layout simulations; power 110 muW; power dissipation; rat spinal column; size 0.18 mum; wires; Anodes; Application specific integrated circuits; Arrays; Capacitors; Transistors; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits, and Systems (ICECS), 2013 IEEE 20th International Conference on

Conference_Location

Abu Dhabi

Type

conf

DOI

10.1109/ICECS.2013.6815456

Filename

6815456