VHDL-based digital circuit synthesis: a case study

2002 ◽  
Author(s):  
F.L. Viana ◽  
F. Damiani
Keyword(s):  
Digital Circuit ◽  
Circuit Synthesis

Bio-Inspired Background Suppression Technique and its Implementation into Digital Circuit

2012 ◽  
pp. 340-358
Author(s):  
Takao Yamanaka ◽  
Yuta Munakata
Keyword(s):  
Gas Sensors ◽  
Hebbian Learning ◽  
Gas Sensing ◽  
Digital Circuit ◽  
Background Suppression ◽  
Adaptation Mechanism ◽  
Alarm Systems ◽  
Suppression Technique ◽  
Background Gas

Gas sensors have been widely used for various applications, such as gas leak detection, fire alarm systems, and odor-sensing systems. A problem of the gas sensors has been the selectivity to a target gas: background gases interfere with the measurement of the target gas. In the human olfaction, sensitivity to background odors is decreased by adaptation to the odors. Recently, several bio-inspired signal-processing methods mimicking the adaptation mechanism have been proposed for improving the selectivity of the gas sensors. In this chapter, the studies on the bio-inspired background suppression methods are reviewed. Furthermore, a case study of the bio-inspired background suppression is introduced. In the case study, a perceptron neural network with anti-Hebbian learning was used for realizing the adaptation to the background gas, and was implemented into a digital circuit for real-time gas sensing.

scholarly journals Some Applications of Fractional Calculus in Engineering

2010 ◽  
Vol 2010 ◽  
pp. 1-34 ◽  
Author(s):  
J. A. Tenreiro Machado ◽  
Manuel F. Silva ◽  
Ramiro S. Barbosa ◽  
Isabel S. Jesus ◽  
Cecília M. Reis ◽  
...  
Keyword(s):  
Dynamical Systems ◽  
Fractional Calculus ◽  
Differential Calculus ◽  
Digital Circuit ◽  
Heat Diffusion ◽  
Legged Robots ◽  
Circuit Synthesis ◽  
Redundant Robots ◽  
Dynamics And Control ◽  
And Control

Fractional Calculus (FC) goes back to the beginning of the theory of differential calculus. Nevertheless, the application of FC just emerged in the last two decades, due to the progress in the area of chaos that revealed subtle relationships with the FC concepts. In the field of dynamical systems theory some work has been carried out but the proposed models and algorithms are still in a preliminary stage of establishment. Having these ideas in mind, the paper discusses FC in the study of system dynamics and control. In this perspective, this paper investigates the use of FC in the fields of controller tuning, legged robots, redundant robots, heat diffusion, and digital circuit synthesis.

scholarly journals General Decomposition and Its Use in Digital Circuit Synthesis

VLSI Design ◽  
1995 ◽  
Vol 3 (3-4) ◽  
pp. 225-248 ◽  
Author(s):  
Lech Jóźwiak
Keyword(s):  
Design Methodology ◽  
Digital Circuits ◽  
Building Blocks ◽  
Digital Circuit ◽  
Structural Features ◽  
Logic Design ◽  
Circuit Synthesis ◽  
Abstraction Level ◽  
Microelectronic Technology ◽  
Complex Circuits

Modem microelectronic technology.gives opportunities to build digital circuits of huge complexity and provides a wide diversity of logic building blocks. Although logic designers have been building circuits for many years, they have realized that advances in microelectronic technology are outstripping their abilities to make use of the created opportunities. In this paper, we present the fundamentals of a logic design methodology which meets the requirements of today's complex circuits and modem building blocks. The methodology is based on the theory of general full-decompositions which constitutes the theory of digital circuit structures at the highest abstraction level. The paper explains the theory and shows how it can be used for digital circuit synthesis. The decomposition methodology that is presented ensures “correctness by construction” and enables very effective and efficient post-factum validation. It makes possible extensive examination of the structural features of the required information processing in relation to a given set of objectives and constraints.

The Genesis and Internal Dynamics of El Salvador's People's Revolutionary Army, 1970–1976

2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO
Keyword(s):  
Latin America ◽  
El Salvador ◽  
Early Years ◽  
Left Wing ◽  
Internal Dynamics ◽  
Internal Coherence ◽  
The 1960S

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.

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