A Wireless Integrated Circuit for 100-Channel Charge-Balanced Neural Stimulation
| Autor: | David J. Warren, Gregory A. Clark, Noah M. Ledbetter, Reid R. Harrison, B.K. Thurgood |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Biomedical Circuits and Systems. 3:405-414 |
| ISSN: | 1940-9990 1932-4545 |
| Popis: | The authors present the design of an integrated circuit for wireless neural stimulation, along with benchtop and in - vivo experimental results. The chip has the ability to drive 100 individual stimulation electrodes with constant-current pulses of varying amplitude, duration, interphasic delay, and repetition rate. The stimulation is performed by using a biphasic (cathodic and anodic) current source, injecting and retracting charge from the nervous system. Wireless communication and power are delivered over a 2.765-MHz inductive link. Only three off-chip components are needed to operate the stimulator: a 10-nF capacitor to aid in power-supply regulation, a small capacitor (< 100 pF) for tuning the coil to resonance, and a coil for power and command reception. The chip was fabricated in a commercially available 0.6- mum 2P3M BiCMOS process. The chip was able to activate motor fibers to produce muscle twitches via a Utah Slanted Electrode Array implanted in cat sciatic nerve, and to activate sensory fibers to recruit evoked potentials in somatosensory cortex. |
| Databáze: | OpenAIRE |
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