Title :
A flexible high voltage biphasic current-controlled stimulator
Author :
Nadeau, Patrick ; Sawan, Mohamad
Author_Institution :
Dept. of Electr. Eng., Ecole Polytech. de Montreal, Montreal, QC
fDate :
Nov. 29 2006-Dec. 1 2006
Abstract :
The efficiency of implantable stimulation systems depends in large proportion of the electrode-tissue interface condition and in the choice of appropriate stimuli waveform. In this paper, we present an integrated flexible stimuli generator dedicated for high current stimulation in large electrode-tissue contact impedance. The system, powered by a single 3.3 V supply level, includes an integrated high voltage generator in order to supplies the output stage with -10 V/+10 V. High voltage parts are implemented in a 9 mm2 chip using a 0.8 um high voltage process. For area and power efficiency concern, the control unit of the whole device is implemented in a standard 0.18 um technology and use 1.96 mm2 of silicon area. Preliminary results indicate that the stimuli generator can deliver a stimulating current of 2 mA in electrode-tissue impedance as high as 9.125 kOmega.
Keywords :
CMOS integrated circuits; bioelectric phenomena; biological tissues; biomedical electrodes; biomedical electronics; prosthetics; pulse generators; current 2 mA; current-controlled stimulator; electrode-tissue contact impedance; electrode-tissue interface; high-voltage biphasic pulse generator; implantable stimulation systems; integrated flexible stimuli generator; resistance 9.125 kohm; stimuli waveform; Bladder; CMOS process; Digital control; Electrical stimulation; Electrodes; Impedance; Nervous system; Pulse generation; Radio frequency; Voltage;
Conference_Titel :
Biomedical Circuits and Systems Conference, 2006. BioCAS 2006. IEEE
Conference_Location :
London
Print_ISBN :
978-1-4244-0436-0
Electronic_ISBN :
978-1-4244-0437-7
DOI :
10.1109/BIOCAS.2006.4600344
