Title :
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
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-4262-3
DOI :
10.1109/IEMBS.1997.758717
