Programmable high-amplitude balanced stimulus current-source for implantable microstimulators

Author

Bourret, S. ; Sawan, M. ; Plamondon, R.

Author_Institution

Dept. of Electr. & Comput. Eng., Ecole Polytech., Montreal, Que., Canada

Volume

5

fYear

1997

fDate

1997

Firstpage

1938

Abstract

In this paper, a 5 bit programmable current-source dedicated to implantable microstimulators is presented. Generating a maximum current of 4 mA through a 1 KΩ load, it takes advantage of the BiCMOS 0.8 μm technology which allows high current-level output-stage. It occupies a silicium area smaller than 0.026 mm². Simulation results showed good linearity and low power consumption. Its architecture allows the generation of bi-directional current pulses and features an almost null DC offset. Finally, the proposed current-source can be easily modified to output a smaller current range, enabling greater precision and giving the possibility to stimulate nerves with higher impedances

Keywords

BiCMOS integrated circuits; constant current sources; current mirrors; digital-analogue conversion; neuromuscular stimulation; programmable circuits; prosthetic power supplies; 1 kohm; 4 mA; BiCMOS technology; almost null DC offset; bidirectional current pulses; bladder stimulator; control logic; current mirror; current mode DAC; functional electrical stimulation; high current-level output-stage; high-amplitude balanced stimulus current-source; implantable microstimulators; linearity; low power consumption; programmable current-source; Arm; BiCMOS integrated circuits; Clocks; DC generators; Energy consumption; Impedance; Leg; Linearity; Pulse generation; Spinal cord;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-4262-3

Type

conf

DOI

10.1109/IEMBS.1997.758717

Filename

758717