A 16-channel Neural Stimulator IC with DAC Sharing Scheme for Artificial Retinal Prostheses
نویسندگان
چکیده
The neural stimulators have been employed to the visual prostheses system based on the functional electrical stimulation (FES). Due to the size limitation of the implantable device, the smaller area of the unit current driver pixel is highly desired for higher resolution current stimulation system. This paper presents a 16-channel compact current-mode neural stimulator IC with digital to analog converter (DAC) sharing scheme for artificial retinal prostheses. The individual pixel circuits in the stimulator IC share a single 6 bit DAC using the sample-and-hold scheme. The DAC sharing scheme enables the simultaneous stimulation on multiple active pixels with a single DAC while maintaining small size and low power. The layout size of the stimulator circuit with the DAC sharing scheme is reduced to be 51.98 %, compared to the conventional scheme. The stimulator IC is designed using standard 0.18 μm 1P6M process. The chip size except the I/O cells is 437
منابع مشابه
Micro-stimulator Design for Retinal Prostheses
SINGH, PRAVEEN RAJAN. Micro-stimulator design for retinal prostheses. (under the direction of Dr. Wentai Liu.) The purpose of this research is to design an integrated circuit (IC) to stimulate retina. The IC is able to generate electrical stimulus specified by medical researchers. The IC is optimize for power and area, as it has to be implanted inside the eye. Specified area goal is to provide ...
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