Pseudo-Resistor Based Attenuator as an Efficient Electrode Driver for Sinusoidal Stimulation of Retinas

Most concepts for retinal stimulation rely on rectangular waveforms, although studies suggest sinusoidal stimulation might improve visual perception. We present a novel approach for a power and area efficient generation of sinusoidal stimulation waveforms by modulation of an external reference sine...

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Bibliographic Details
Published in2020 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 1 - 5
Main Authors Schutz, Henning, Steinhoff, Raphael, Moll, Steffen, Herrmann, Thoralf, Zeck, Gunther, Rothermel, Albrecht
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2020
Subjects
Attenuators
Electrodes
Lighting
Modulation
Power demand
Resistance
Voltage control
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Summary:Most concepts for retinal stimulation rely on rectangular waveforms, although studies suggest sinusoidal stimulation might improve visual perception. We present a novel approach for a power and area efficient generation of sinusoidal stimulation waveforms by modulation of an external reference sine wave. Modulation is performed by an attenuator based on variable CMOS pseudo-resistors. The implementation of a complete channel is presented along with two different versions of the attenuators. Both architectures are investigated in terms of signal quality, symmetry and power consumption.
ISBN:9781728133201
1728133203
ISSN:2158-1525
2158-1525
DOI:10.1109/ISCAS45731.2020.9180425