Buscar
Mostrando ítems 171-180 de 185
Ponencia
Study of Non-Linear S/H Operation in Switched-Current Circuits Using Volterra Series - Application to BandPass Sigma-Delta Modulators
(2001)
This paper analyses the transient behaviour of SwItched-current (SI) memory cells placed at the front-end of high-speed A/D interfaces. Based on the Volterra series method, the non-linear sampling process occurring in ...
Ponencia
Electrical-level synthesis of pipeline ADCs
(Institute of Electrical and Electronics Engineers, 2008)
This paper presents a design tool for the synthesis of pipeline ADCs which is able to optimally map high-level converter specifications, such as the required effective resolution, onto electrical-level parameters, i.e., ...
Ponencia
Top-Down Design of a xDSL 14-bit 4MSh ZA Modulator in Digital CMOS Technology
(Institute of Electrical and Electronics Engineers, 2001)
This paper describes the design of a Sigma-Delta modulator aimed for A/D conversion in xDSL applications, featuring 14-bit@4Msample/s in a 0.35μm mainstream digital CMOS technology. Architecture selection, modulator sizing ...
Ponencia
Programmable resolution imager for imaging applications
(SPIE- The International Society for Optical Engineering, 2000)
In this paper a programmable imager with averaging capabilities will be described which is intended for averaging of different groups or sets of pixels formed by n×n kernels, n×m kernels or any group of randomly-selected ...
Ponencia
CMOS realization of a 2-layer CNN universal machine chip
(Institute of Electrical and Electronics Engineers, 2002)
Some of the features of the biological retina can be modelled by a cellular neural network (CNN) composed of two dynamically coupled layers of locally connected elementary nonlinear processors. In order to explore the ...
Artículo
Analog and mixed-signal IC design and design methodologies
(Elsevier, 2003)
Ponencia
Random chopping in ΣΔ modulators
(2009)
Σ∆ modulators make a clever use of oversampling and exhibit inherent monotonicity, high linearity and large dynamic range but a restricted frequency range. As a result Σ∆ modulators are often the preferred option for ...
Artículo
A new high-level synthesis methodology of cascaded continuous-time ΣΔ modulators
(Institute of Electrical and Electronics Engineers, 2006)
This brief presents an efficient method for synthesizing cascaded sigma–delta modulators implemented with continuous-time circuits. It is based on the direct synthesis of the whole cascaded architecture in the continuous-time ...
Ponencia
A VLSI-oriented and power-efficient approach for dynamic texture recognition applied to smoke detection
(2009)
The recognition of dynamic textures is fundamental in processing image sequences as they are very common in natural scenes. The computation of the optic flow is the most popular method to detect, segment and analyse dynamic ...
Ponencia
Towards a computational approach for collision avoidance with real-world scenes
(SPIE- The International Society for Optical Engineering, 2003)
In the central nervous systems of animals like pigeons and locusts, neurons were identified which signal objects approaching the animal on a direct collision course. In order to timely initiate escape behavior, these neurons ...