John L. Wyatt
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View article: Redundant safety features in a high-channel-count retinal neurostimulator
Redundant safety features in a high-channel-count retinal neurostimulator Open
Safety features embedded in a 256-channel retinal prosthesis integrated circuit are presented. The biology of the retina and the electrochemistry of the electrode-tissue interface demand careful planning and design of the safety features o…
View article: ASIC design and data communications for the Boston retinal prosthesis
ASIC design and data communications for the Boston retinal prosthesis Open
We report on the design and testing of a custom application-specific integrated circuit (ASIC) that has been developed as a key component of the Boston retinal prosthesis. This device has been designed for patients who are blind due to age…
View article: A Hermetic Wireless Subretinal Neurostimulator for Vision Prostheses
A Hermetic Wireless Subretinal Neurostimulator for Vision Prostheses Open
A miniaturized, hermetically encased, wirelessly operated retinal prosthesis has been developed for preclinical studies in the Yucatan minipig, and includes several design improvements over our previously reported device. The prosthesis at…
View article: Overview of the boston retinal prosthesis: Challenges and opportunities to restore useful vision to the blind
Overview of the boston retinal prosthesis: Challenges and opportunities to restore useful vision to the blind Open
A small, hermetic, wirelessly-controlled retinal prosthesis was developed for pre-clinical studies in Yucatan mini-pigs. The device was implanted on the outside of the eye in the orbit, and it received both power and data wirelessly from e…
View article: Development of the boston retinal prosthesis
Development of the boston retinal prosthesis Open
A small, hermetic, wirelessly-controlled retinal prosthesis was developed for pre-clinical studies in Yucatan mini-pigs. The device was implanted on the outside of the eye in the orbit, and it received both power and data wirelessly from e…
View article: Optimal primary coil size for wireless power telemetry to medical implants
Optimal primary coil size for wireless power telemetry to medical implants Open
A retinal prosthesis telemetry system is examined, and several methods are explored to optimize the size of the external primary telemetry coil to maximize the wireless delivery of power to an implanted secondary coil of constrained size. …
View article: The boston retinal prosthesis: A 15-channel hermetic wireless neural stimulator
The boston retinal prosthesis: A 15-channel hermetic wireless neural stimulator Open
A miniaturized, hermetically-encased, wirelessly-operated retinal prosthesis has been developed for pre-clinical studies in Yucatan minipig animal models. The prosthesis attaches conformally to the outside of the eye and drives a microfabr…
View article: Realization of a 15-channel, hermetically-encased wireless subretinal prosthesis for the blind
Realization of a 15-channel, hermetically-encased wireless subretinal prosthesis for the blind Open
A miniaturized, hermetically-encased, wirelessly-operated retinal prosthesis has been developed for implantation and pre-clinical studies in Yucatan mini-pig animal models. The prosthesis conforms to the eye and drives a microfabricated po…
View article: Development and Implantation of a Minimally Invasive Wireless Subretinal Neurostimulator
Development and Implantation of a Minimally Invasive Wireless Subretinal Neurostimulator Open
A wirelessly operated, minimally invasive retinal prosthesis was developed for preclinical chronic implantation studies in Yucatan minipig models. The implant conforms to the outer wall of the eye and drives a microfabricated polyimide sti…
View article: Nonlinear Device Noise Models:Thermodynamic Requirements
Nonlinear Device Noise Models:Thermodynamic Requirements Open
This paper proposes three tests to determine whether a given nonlinear device noise model is in agreement with accepted thermodynamic principles. These tests are applied to several models. One conclusion is that every Gaussian noise model …
View article: A circuit model for diffusive breast imaging and a numerical algorithm for its inverse problem
A circuit model for diffusive breast imaging and a numerical algorithm for its inverse problem Open
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
View article: Nonlinear dynamic maximum power theorem
Nonlinear dynamic maximum power theorem Open
The problem of maximizing the energy or average power transfer from a nonlinear dynamic source is considered. The main theorem includes, as special cases, the standard linear result where the load admittance equals the complex conjugate of…
View article: Custom Integrated Circuits
Custom Integrated Circuits Open
Contains table of contents for Part III, table of contents for Section 1 and reports on ten research projects.
View article: Custom integrated circuits
Custom integrated circuits Open
Contains table of contents for Part III, table of contents for Section 1 and reports on ten research projects.
View article: Nonlinear Dynamic Maximum Power Theorem, with Numerical Method
Nonlinear Dynamic Maximum Power Theorem, with Numerical Method Open
This paper considers the problem of maximizing the energy or average power transfer from a nonlinear dynamic n-port source.The main theorem includes as special cases the standard linear result Yload = Y*source and a recent finding for nonl…