LEÑERO BARDALLO , Juan Antonio

This communication summarizes the results obtained after the implementation of a Cycle of Improvement in the Classroom for the subject Devices and Micro and Nanotechnologies of the Master in Microelectronics of the University of Seville during the academic year 2021-2022. As a novelty, the students had to seek the teaching material about...

La implementación de un Ciclo de Mejora Docente (CDM) se ha realizado en la asignatura "Electrónica Física". La asignatura es el primer contacto de los estudiantes con el estudio de la física de los dispositivos semiconductores, siendo muchos de los conceptos impartidos totalmente novedosos para el alumnado. El índice de aprobados de la...

En los últimos años hemos podido apreciar un crecimiento exponencial en las ventas de sistemas de visión. Dicha tendencia no parece detenerse y es, en parte, debida al auge de los sistemas de telefonía móvil. Probablemente, cualquier persona está famili ... arizada con conceptos como el número de Megapíxeles o la resolución de una cámara. Ello...

This article investigates the potential of a bio-inspired vision sensor with pixels that detect transients between three primary colors. The in-pixel color processing is inspired by the retinal color opponency that are found in mammalian retinas. Color transitions in a pixel are represented by voltage spikes, which are akin to a neuron's action...

This paper presents a 128 × 128 dynamic vision sensor. Each pixel detects temporal changes in the local illumination. A minimum illumination temporal contrast of 10% can be detected. A compact preamplification stage has been introduced that allows to improve the minimum detectable contrast over previous designs, while at the same time reducing...

Address Event Representation (AER) is an emergent technology for assembling modular multi-blocks bio-inspired sensory and processing systems. Visual sensors (retinae) are among the first AER modules to be reported since the introduction of the technology. Spatial contrast AER retinae are of special interest since they provide highly compressed...

This paper investigates the potential of an image sensor that combines event-based asynchronous outputs with conventional integration of photocurrents. Pixels voltages can be read out following a traditional approach with a source follower and analog-to-digital converter. Furthermore, pixels have circuitry to implement Pulse Density Modulation...

Address Event Representation (AER) is an emergent technology for assembling modular multi-blocks bio-inspired sensory and processing systems. Visual sensors (retinae) are among the first AER modules to be reported since the introduction of the technology. Spatial contrast AER retinae are of special interest since they provide highly compressed...

Low current applications, like neuromorphic circuits, where operating currents can be as low as a few nanoamperes or less, suffer from huge transistor mismatches, resulting in around or less than 1-bit precisions. Recently, a neuromorphic programmable- kernel 2-D convolution chip has been reported where each pixel included two compact...

Reported AER (Address Event Representation) contrast retinae perform a contrast computation based on the ratio between a pixel's local light intensity and a spatially weighted average of its neighbourhood. This results in compact circuits, but with the penalty of all pixels generating output signals even if they sense no contrast. In this paper...