Towards a Low-Power Active Epidural Spinal Cord Array Controlled Through a Two Wire Interface

Conference: PRIME 2012 - 8th Conference on Ph.D. Research in Microelectronics & Electronics
06/12/2012 - 06/15/2012 at Aachen, Germany

Proceedings: PRIME 2012

Pages: 4Language: englishTyp: PDF

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Giagka, Vasiliki; Demosthenous, Andreas (Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK)
Donaldson, Nick (Department of Medical Physics and Bioengineering, University College London, Malet Place, London WC1E 6BT, UK)

The design of a very small low-power IC driving 16 electrodes in any combination, for testing different epidural stimulation patterns in freely moving rats using a two wire interface is presented. A scheme is proposed, to receive power, data, clocking information and stimulus current pulses from an external source via the two wires. This is achieved by a combination of time multiplexing and pulse width modulation. The architecture of the system is discussed and simulated results of some building blocks are presented. Keywords - time-division multiplexing; pulse width modulation, epidural stimulation; implantable electrode driving system.