A precise charge balancing and compliance voltage monitoring stimulator front-end for 1024-electrodes retinal prosthesis.
In: Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, Jg. 2012 (2012), S. 3001-4
academicJournal
Zugriff:
In this paper, we present a precise charge balancing and compliance voltage monitoring stimulator front-end for 1024-electrode retinal prosthesis. Our stimulator is based on current mode stimulation. To generate a precisely matched biphasic current pulse, a dynamic current copying technique is applied at the stimulator front-end. A compliance voltage monitoring circuitry is included at the stimulator front-end to detect if a voltage across electrode-tissue interface goes beyond a predefined compliance voltage. Simulation results show the mismatch of a biphasic current pulse (at a maximum stimulation current of 476µA) is less than 0.1%. Also, the stimulator issues alarm signals, when a voltage compliance occurs during stimulation due to high tissue impedance. Our stimulator is implemented using a 65nm low voltage (LV) CMOS process, which helps reducing implementation area and power consumption.
Titel: |
A precise charge balancing and compliance voltage monitoring stimulator front-end for 1024-electrodes retinal prosthesis.
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Autor/in / Beteiligte Person: | Chun, H ; Tran, N ; Yang, Y ; Kavehei, O ; Bai, S ; Skafidas, S |
Zeitschrift: | Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, Jg. 2012 (2012), S. 3001-4 |
Veröffentlichung: | [Piscataway, NJ] : [IEEE], [2007]-, 2012 |
Medientyp: | academicJournal |
ISSN: | 2694-0604 (electronic) |
DOI: | 10.1109/EMBC.2012.6346595 |
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