This paper describes a preliminary comparative analysis between continuous-time gm-C filters based on a specific transcondutor but designed according to CMOS/bulk (conventional) and CMOS/SOI fabrication processes. A compensation technique to minimize the phase-error (lead-phase) of the basic integrator owing to the relatively high output-conductance of the adopted transconductor is examined. Su...

O objetivo geral da pesquisa consiste em analisar de que forma a distribuição espacial e temporal pluviometria influenciou na produção agrícola do estado Maranhão, realizando um comparativo entre as Unidades Agrícolas Familiares (UAF) Não ou Patronais (UAP) nas Regiões Homogêneas Precipitação (RHP) maranhenses nos anos 2006 2017. Para tanto foi utilizada metodologia análise multivariada modelo ...

An RF passive orthonormal ladder filter using transformers is presented, where the output is obtained from a linear, weighted combination of the voltages or currents at predetermined nodes or branches. With this topology, arbitrary rational transfer functions can be mapped onto silicon. Key features of this single-input, multiple-output (SIMO) topology include low-pass to band-pass/reject trans...

The inverse scattering transformation for a novel nonlocal Lakshmanan–Porsezian–Daniel (LPD) equation with rapidly decaying initial data is studied in the framework of Riemann–Hilbert problem. Firstly, integrable LPD corresponding to $$3\times 3$$ Lax pair proposed. Secondly, process left-right matrix Riemann–Hilbert(RH) problem constructed. analytical properties and symmetry relations Jost fun...

This paper studies the contest behaviour of territorial animals, where a contest begins with an explicit signalling stage. A resident has a choice of two signals, denoting either strong or weak resource holding power. A signal constitutes a bluff when a weak resident signals strong; bluffing, however, entails a cost. An intruder must then assess the signal before choosing whether to attack or r...

We describe the development of a novel positive-selection vector, RHP-AmpS, that is suitable for seamless cloning and high-level protein expression in Escherichia coli. In this vector, beta-lactamase (Bla) was rendered nonfunctional by replacing the codon for the C-terminal amino acid of the beta-lactamase gene (bla) with a stop codon. Insertion of a target gene in the correct orientation (tail...

Novel Ti6Al4V alloy matrix composites with a controllable two-scale network architecture were successfully fabricated by reaction hot pressing (RHP). TiB whiskers (TiBw) were in-situ synthesized around the Ti6Al4V matrix particles, and formed the first-scale network structure (FSNS). Ti5Si3 needles (Ti5Si3) precipitated in the β phase around the equiaxed α phase, and formed the secondary-scale ...

In the present work, implementation of continuous-time high frequency periodic controller is done for stabilization of non-minimum phase system having both right half plane (RHP) pole and zero. This work considers nonminimum phase cart-inverted pendulum system as a test bench. The robustness property of the periodic controller is compared with that of a linear quadratic regulator (LQR) and slid...

The present work deals with the modeling and the stability analysis of the cascaded converters. When a converter tightly regulates its output, it behaves as a constant power load (CPL). The problem of CPLs is that they show negative incremental resistance that causes instability in the system because the control to output transfer function possessed a RHP pole. Hence the CPL has been modeled an...

The nested Miller compensation of three-stage amplifiers is reviewed by using a simple design-oriented approach. The method provides stable amplifiers by accurately controlling the overall phase margin as well as that of the internal loop. Furthermore, the use of nulling resistors to remove the RHP zeros is discussed and optimization criteria are described. A novel technique is presented which ...