Design optimization of a current source for microstimulator applications

St-Amand, Robert; Savaria, Yvon

doi:10.1109/mwscas.1994.519206

Cited by 3 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [13], a DAC implementation is reported with circuit area reduced to 0.01 mm in 1.2 m for 5-bit resolution in which device widths and lengths are varied together to achieve a power-of-two current weighting. Since tracking performance between transistors in current mirrors can suffer from variation, process variation in device geometry, or from channel length modulation [14], this approach may lead to nonmonotonicity in the DAC transfer function.…”

Section: Introductionmentioning

confidence: 99%

An arbitrary waveform stimulus circuit for visual prostheses using a low-area multibias dac

DeMarco

Liu

Singh

et al. 2003

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

Attempts are underway to construct a retinal prosthesis to recover limited vision for blind patients with retinitis pigmentosa using implantable electronic devices. These microchips provide electrical stimulation to damaged retinal tissues using an array of stimulus circuits. This paper describes improvements to conventional circuit designs with significantly decreased implementation area and the ability to support arbitrary stimulus waveforms where an array of such stimulus circuits is required. This yields greater spatial resolution in stimulation owing to more stimulus circuits per chip area. Also introduced are digital-to-analog converter gain prescalar and dc-offset circuits which tune the stimulus circuits to an optimally effective range due to variation in retinal degradation. The prototype chip was fabricated by MOSIS in 1.2-m CMOS technology.Index Terms-Age-related macular degeneration, digitalto-analog converter (DAC), electrical stimulation, retinal prosthesis, retinitis pigmentosa, visual prosthesis.

show abstract

Section: Introductionmentioning

confidence: 99%

An arbitrary waveform stimulus circuit for visual prostheses using a low-area multibias dac

DeMarco

Liu

Singh

et al. 2003

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

show abstract

Challenges and Trends of Implantable Functional Electrical Neural Stimulators: System Architecture and Parameters

Katebi,

Erfanian,

Azim Karami

et al. 2024

IEEE Access

View full text Add to dashboard Cite

VLSI implementation of wireless power and data transmission circuits for micro-stimulator

Lee

Chen

2003 International Symposium on VLSI Technology, Systems and Applications. Proceedings of Technical Papers. (IEEE Cat. No.03TH8

View full text Add to dashboard Cite

This paper presents the realization of the radio frequency (RF) power and data transmission for implantablc micro-stimulators This implantable devicc includes an intemal RF front-end circuit, a control circuit, and a stimulator. A 2MHc AM modulated sibmal including the power and data nccessary for the implantable devicc is received, and a stable DC voltage and digital data will he extracted to stimulate the neuromuscular stimulation. The stimulator is a currentsource stimulator, which is capable to generate a wide range of stimulation waveforms and stimulation patterns for a nerve cuff electrode. In this paper, most of the integrated circuits for the implantablc device have hecn proposed and verified by using Hspice according to the technology ofTSMC 0.25 um CMOS praccss.

show abstract

Design optimization of a current source for microstimulator applications

Cited by 3 publications

References 5 publications

An arbitrary waveform stimulus circuit for visual prostheses using a low-area multibias dac

An arbitrary waveform stimulus circuit for visual prostheses using a low-area multibias dac

Challenges and Trends of Implantable Functional Electrical Neural Stimulators: System Architecture and Parameters

VLSI implementation of wireless power and data transmission circuits for micro-stimulator

Contact Info

Product

Resources

About