Optic nerve signals in a neuromorphic chip I: Outer and inner retina models

  title={Optic nerve signals in a neuromorphic chip I: Outer and inner retina models},
  author={Kareem A. Zaghloul and Kwabena Boahen},
  journal={IEEE Transactions on Biomedical Engineering},
We present a novel model for the mammalian retina and analyze its behavior. Our outer retina model performs bandpass spatiotemporal filtering. It is comprised of two reciprocally connected resistive grids that model the cone and horizontal cell syncytia. We show analytically that its sensitivity is proportional to the space-constant-ratio of the two grids while its half-max response is set by the local average intensity. Thus, this outer retina model realizes luminance adaptation. Our inner… CONTINUE READING
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An on-off log-domain filter circuit

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A silicon model of the mammalian retina

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