A multi-channel recording/stimulation device for neuro-prosthetic application

BISONI, LORENZO;CARBONI, CATERINA;CARTA N;PUDDU, ROBERTO;BARBARO, MASSIMO;RAFFO, LUIGI

2014-01-01

---

Abstract

In this paper a system for neural recording and stimulation is presented. The device is composed of two different IC: a recording chip, implemented in a 3.3V 0.35µm CMOS technology, and a stimulation chip, realized with a High Voltage 0.35µm CMOS process. The recording module is able to acquire neural signals from the Peripheral Nervous System (PNS), amplifying, filtering and converting them in a digital format. The stimulation chip can provide stimulation currents in the range of hundreds of microamperes with impedances up to tens of kOhm, thanks to a voltage booster that brings the voltage supply up to 19V. The ICs, hosted in a custom PCB, communicate with the PC thanks to a Xilinx-Spartan6 LX45 prototyping board. The experimental measures show the system capabilities to record signals in the range of few microvolts with a total IRN of 4µVrms and to generate programmable biphasic current pulse trains.