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A 16-Channel Wireless Neural Interfacing SoC With RF-powered Energy-Replenishing Adiabatic Stimulation

  • Author(s): Ha, Sohmyung
  • Akinin, Abraham
  • Park, Jiwoong
  • Kim, Chul
  • Wang, Hui
  • Maier, Christoph
  • Cauwenberghs, Gert
  • Editor(s): Mercier, Patrick
  • et al.
Abstract

This paper presents a fully-integrated 16-channel wireless neural interfacing SoC that employs an adiabatic stimulator powered directly from a 190-MHz on-chip antenna to eliminate bulky external components while simultaneously avoiding rectifier and regulator losses. Using a charge replenishing architecture, the stimulator outputs up to 145-μA, while achieving a 63.1% charge replenishing ratio and a stimulation efficiency factor of 6.0. Analog front-ends (AFEs) and telemetry circuitry are also included.

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