COLODRO RUIZ , Francisco

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La presente invención se refiere a un modulador Sigma-Delta (SD) en cascada multifrecuencia. Este modulador se caracteriza porque emplea dos o más frecuencias de muestreo diferentes en las distintas etapas del mismo.El uso del modulador SD en cascada mult

Modern electric machines are attracting great interest from the research community as a result of the increasing number of current applications, including electric vehicles and wind power generators, among others. Different machines, power converters, and control technologies are used, and the number of sensors is usually minimized to reduce...

En este artículo se presenta la realización de una Red Nueronal Estocástica de Hopfield (SHNN) con un gran número de unidades. Originalmente, la SHNN propuesta por van de Bout, requiere tiempos de convergencia grandes al acumularse en el Estado neuronal los pulsos estocáticos que codifican las sinapsis secuenciamente. En otras realizaciones...

Angle measurement is widely used in the servo positioning and speed control of electrical drives, where optical encoders are employed as sensors and coupled to microcontrollers with complex peripherals to provide effective position and speed measurement methods. These methods can achieve high precision and fast response, but are not...

Transceivers built to modern communication standards tend to be as digital as possible, including the radio-frequency stages. This forces the digital-to-analogue converters (DACs) in the transmitter section to have a large bandwidth. DACs based on sigma-delta (SD) modulation represent a good choice in modern digital technologies as they have a...

A novel CMOS membership function circuit (MBC) is presented. It is based on a linear tunable transconductor proposed in [1] and implements trapezoidal/triangular functions with all parameters (slope, position, width, eight andamplitude) independently and continuously adjustable. It is suitable to be used in analog fuzzy circuits working in...

A novel mixed-signal CMOS membership function generator (MFG) is presented. It is based on an enhanced version of a linear tunable transconductor proposed in [1] and implements trapezoidal/triangular functions with all parameters (slope, position, width and height) independently and continuously adjustable. It is suitable to be used in analog...

This paper present the application of Pulse Stream Tech-niques (PSTs) to the hardware implementation of a Cellular Neural Network. The time differential equation of this networks suggests that the dynamic of one neuron status can be emulated by adding discretized packets of charge to a capacitor. This task can be carried out by driving a...

In this paper, a silicon compiler for analog fuzzy controllers is presented. The layout is automatically generated automatically, startingfrom a set of user specificationssuch as numberof rules, number of inputs and maximum current (power consumption). This tool relies on a library of parametrizable basic cells designed in a CMOS 0.7 m...

Drones can be very helpful in precision agriculture. Currently, most drone-based solutions for plant disease detection incorporate multispectral, hyperspectral, or thermal cameras, which are expensive. In addition, there is a trend nowadays to apply machine learning techniques to precision agriculture, which are computationally complex and...

Pulse-Width (PW) modulation is widely used in those applications where an analog or digital signal has to be encoded in the time domain as a binary stream, such as switched-mode power amplifiers in transmitters of modern telecommunication standards, high-resolution digital signal conversion using single-bit digital-to-analog converters, and...

This paper presents the hardware architecture of a System on Chip (SoC) implemented in an ASIC. It has been designed for a wide range of applications and will be used in a power line modem. A set of reusable cells based on AMBA standard has been also designed, included memory, interrupt controller and peripherals. Presented architecture...

Wide band-gap (WBG) semiconductors technology represents a potential candidate to displace conventional silicon (Si) technology used in power electronics. Between Silicon Carbide (SiC) and Gallium Nitride (GaN) power semiconductors, the latter is the least mature of both technologies, with many open research problems, especially in the...