Cited by 36Neuroscience and Neural EngineeringAnalog and Mixed-Signal Circuit DesignRadio Frequency Integrated Circuit Design

A Multichannel High-Frequency Power-Isolated Neural Stimulator With Crosstalk Reduction

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Jiang, Dai, Demosthenous, Andreas·2018·IEEE Transactions on Biomedical Circuits and Systems

Abstract

In neuroprostheses applications requiring simultaneous stimulations on a multielectrode array, electric crosstalk, the spatial interaction between electric fields from various electrodes is a major limitation to the performance of multichannel stimulation. This paper presents a multichannel stimulator design that combines high-frequency current stimulation (using biphasic charge-balanced chopped pulse profile) with a switched-capacitor power isolation method. The approach minimizes crosstalk and is particularly suitable for fully integrated realization. A stimulator fabricated in a 0.6 μm CMOS high-voltage technology is presented. It is used to implement a multichannel, high-frequency, power-isolated stimulator. Crosstalk reduction is demonstrated with electrodes in physiological media while the efficacy of the high-frequency stimulator chip is proven in vivo. The stimulator provides fully independent operation on multiple channels and full flexibility in the design of neural modulation protocols.

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Crossref · 10.1109/tbcas.2018.2832541

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  • High compliance voltage for current stimulation consumes large amounts of power and may result in redundant voltage overhead on the electrodes, as their impedance may vary over time and position by several orders of magnitude.

    “This consumes large amounts of power and may result in redundant voltage overhead on the electrodes, as their impedance may vary over time and position by several orders of magnitude [78], [128].”

    From Active Neural Interface Circuits and Systems for Selective Control of Peripheral Nerves: A Review (2024) · cites this paper as [78]

    The Discussion (G. Discussion; page unavailable) says dynamic supply-voltage control could improve power efficiency by reducing redundant voltage headroom on the electrodes. It does not say that electrode impedance varies over time and position by several orders of magnitude, or specifically attribute large power consumption to high compliance voltage. (LLM, conf=0.84)

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  • HV technologies provide thick gate oxide devices that withstand higher voltages and superior isolation between stimulating channels, particularly via shallow or deep trench isolation, which separates the module substrates, thus limiting the occurrence of crosstalk.

    “HV technologies provide thick gate oxide devices that withstand higher voltages and superior isolation between stimulating channels, particularly via shallow or deep trench isolation, which separates the module substrates, thus limiting the occurrence of crosstalk [78].”

    From Active Neural Interface Circuits and Systems for Selective Control of Peripheral Nerves: A Review (2024) · cites this paper as [78]

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  • Proximity of interface sites on tissue can result in crosstalk between channels due to current spread, which can compromise efficacy of the neural interface solution, requiring electrical or physical isolation between interface channels.

    “However, the proximity of interface sites on the tissue can result in crosstalk between channels due to current spread. This can compromise the efficacy of the neural interface solution [77], requiring electrical [78] or physical isolation between the interface channel [71].”

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Research works printed but not linked: 1

  1. B. Chiang, G. Fridman, C. Dai, M. Rahman, and C. Della Santina, "Design and performance of a multichannel vestibular prosthesis," IEEE Trans. Neural Syst. Rehabil. Eng., vol. 19, no. 5, pp. 588-598, Oct. 2011.

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Authors
Jiang, D., & Demosthenous, A.
Affiliations
University College London (GB)
Venue
IEEE Transactions on Biomedical Circuits and Systems
Published
2018-08
Volume
12
Issue
4
Pages
940-953
ISSN
  • 1932-4545 (ISSN-L)
  • 1940-9990
OpenAlex
W2886606287
Cited by
36
References
36
Citations by year
2026: 3 · 2025: 6 · 2024: 7 · 2023: 3 · 2022: 6 · 2021: 6 · 2020: 3 · 2019: 1 · 2018: 1
FWCI
1.24
Type
journal article
Language
en
Open access
Locations
  • IEEE Transactions on Biomedical Circuits and Systems (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • Engineering and Physical Sciences Research Council (EP/F009593/1)
  • European Commission
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Physical Sciences › Engineering › Biomedical Engineering › Analog and Mixed-Signal Circuit Design
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Radio Frequency Integrated Circuit Design
Keywords
neural stimulator, multichannel stimulation, microelectrode arrays, neural prostheses, in vivo stimulation
MeSH terms
Animals, Electric Stimulation, Electrodes, Implanted, Equipment Design, Humans, Neurons, Implantable Neurostimulators

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