Genetic Algorithm for the Design of Electro-Mechanical Sigma Delta Modulator MEMS Sensors [PDF]
Sensors, 2011 This paper describes a novel design methodology using non-linear models for complex closed loop electro-mechanical sigma-delta modulators (EMΣΔM) that is based on genetic algorithms and statistical variation analysis.
Michael Kraft, Reuben Wilcock
doaj +2 more sources
Finite-Time Current Tracking in Boost Converters by Using a Saturated Super-Twisting Algorithm
Complexity, 2020 The power converters are widely used in several industrial applications where it is necessary to obtain from a fixed voltage another one higher or lower than the original.
Juan-Eduardo Velázquez-Velázquez +4 more
doaj +1 more source
Multi-bit cascade ΣΔ modulator for high-speed A/D conversion with reduced sensitivity to DAC errors [PDF]
, 1998 El pdf del artículo es la versión post-print.This paper presents a ΣΔ modulator (ΣΔM) which combines single-bit and multi-bit quantization in a cascade architecture to obtain high resolution with low oversampling ratio.
Medeiro, Fernando +3 more
core +4 more sources
Critical bubbles and implications for critical black strings [PDF]
, 2004 We demonstrate the existence of gravitational critical phenomena in higher dimensional electrovac bubble spacetimes. To this end, we study linear fluctuations about families of static, homogeneous spherically symmetric bubble spacetimes in Kaluza-Klein ...
K. Jörgens +7 more
core +1 more source
Resonation-based hybrid continuous-time/discrete-time cascade ΣΔ modulators: application to 4G wireless telecom [PDF]
, 2009 This paper presents innovative architectures of hybrid Continuous-Time/Discrete-Time (CT/DT) cascade ΣΔ Modulators (ΣΔMs) made up of a front-end CT stage and a back-end DT stage.
Morgado García de la Polavieja, Alonso +2 more
core +1 more source
Weakly hyperbolic equations with non-analytic coefficients and lower order terms [PDF]
, 2012 In this paper we consider weakly hyperbolic equations of higher orders in arbitrary dimensions with time-dependent coefficients and lower order terms. We prove the Gevrey well-posedness of the Cauchy problem under $C^k$-regularity of coefficients of the ...
Garetto, Claudia, Ruzhansky, Michael
core +3 more sources
Inside Catalogs: A Comparison of Source Extraction Software [PDF]
, 2012 The scope of this article is to compare the catalog extraction performances obtained using the new combination of SExtractor with PSFEx against the more traditional and diffuse application of DAOPHOT with ALLSTAR; therefore, the paper may provide a guide
Annunziatella, M. +4 more
core +3 more sources
The issue of photons in dielectrics: Hamiltonian viewpoint
, 2007 The definition of the photon in the vacuum of general relativity provided by Kermack et al. and by Synge is extended to nondispersive, nonhomogeneous, isotropic dielectrics in arbitrary motion by Hamiltonian methods that rely on Gordon's effective metric.
Antoci, S., Mihich, L.
core +4 more sources
A 12-bit@40MS/s Gm-C Cascade 3-2 Continuous-Time Sigma-Delta Modulator [PDF]
, 2007 This paper reports the transistor-level design of a 130-nm CMOS continuous-time cascade ΣΔ modulator. The modulator topology, directly synthesized in the continuous-time domain, consists of a third-order stage followed by a second-order stage, both ...
Tortosa, Ramón +4 more
core +1 more source
FRW cosmology in Milgrom's bimetric theory of gravity [PDF]
, 2010 We consider spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW) solutions of Milgrom's recently proposed class of bimetric theories of gravity. These theories have two different regimes, corresponding to high and low acceleration.
Clifton, Timothy, Zlosnik, Thomas G.
core +2 more sources