M. A. Reyes-Barranca

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The object the present work is to present a model for a retinal prosthesis. The translation of an algorithm on the standard technology of silicon sets a trade off between accurate of model and feasibility to implementation. That is, a high accurately of the model, normally results in more complexity, and therefore minus feasibly its implementation in(More)
Etching post-processes are usually done with systems based on MEMS structures compatible with CMOS technology like micro hotplates membranes used in MEMS gas sensors. Silicon anisotsropic etch steps follows fabrication of the integrated circuit in a silicon foundry for the release of the membrane but care should be taken to avoid damage to other layers used(More)
A control system to regulate the temperature of the micro hotplate in a MEMS gas sensor is presented. The controlelement, called micro hotplate, is comprised of a micro heater and a temperature sensor, both made with polysilicon, located near each other. This material has a Temperature Coefficient of Resistance (TCR) that is the basis for the design of the(More)
An analog architecture of optic signal processing is presented in this work, with the goal to emulate one of the much processes involved in a biological retina. Here we have considered that the receptive field is the main unit of processing in the visual system. So, the proposed architecture tries to give partial solution to the properties of a receptive(More)
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