Recent advances in power efficient output stage for high density implantable stimulators
Abstract
A major drawback of a current-controlled stimulation is its power efficiency. However, it is commonly used in implantable stimulators due to its safety. The power efficiency of a current-controlled stimulation can be improved by reducing the headroom voltage needed in the current driver. A promising technique is to bias the transistor in triode region whereas improving output impedance through the regulated cascode structure. This comes with a feature of implicit compliance monitor which is used for the supply voltage adaptation. This paper presents an overview on recent power efficient high voltage-compliance output drivers.
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Incorporating active feedback in a regulated cascode structure can boost the output impedance by added amplifier gain, where symmetrical operation of the two current branches maximises linearity in HV applications.
“Incorporating active feedback in a regulated cascode structure can boost the output impedance by added amplifier gain, where symmetrical operation of the two current branches maximises linearity in HV applications. However, this method introduces additional mismatch from the VCRs [139].”
From Active Neural Interface Circuits and Systems for Selective Control of Peripheral Nerves: A Review (2024) · cites this paper as [139]
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System Design of Neural Stimulators
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- Authors
- Sooksood, K., Noorsal, E., Bihr, U., & Ortmanns, M.
- Affiliations
- King Mongkut's Institute of Technology Ladkrabang (TH)
- Universiti Teknologi MARA System (MY)
- Universität Ulm (DE)
- Venue
- 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society
- Publisher
- IEEE
- Published
- 2012-08
- Volume
- 2012
- Pages
- 855-858
- ISSN
- 2375-7477 (ISSN-L)
- OpenAlex
- W2054834426
- Cited by
- 11
- References
- 11
- Citations by year
- 2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2016: 2 · 2015: 2 · 2014: 3
- FWCI
- 3.44
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Analog and Mixed-Signal Circuit Design
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Low-power high-performance VLSI design
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Radio Frequency Integrated Circuit Design
- Keywords
- implantable stimulator, power efficiency, output driver
- MeSH terms
- Electrodes, Implanted, Humans, Models, Theoretical, Electric Impedance
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