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An algorithm for radar signal detection method based on a time-frequency representation (TFR) and Viterbi algorithm (VA) is proposed. Two TFR methods are considered, Short-time Fourier Transform (STFT) and S-method (SM). Performance and detection ability of the proposed algorithm was investigated on real radar signals of a single manuvering target with added Gaussian noise and signal-to-noise ratio...
The multitone signals make traditional analysis difficult even impossible if the circuits are highly nonlinear. Using multiple time variables allow an efficient representation of these signals. In this formulation the components with different rates of variation are decoupled, each disparate signal being represented by its own artificial time scale. The differential algebraic equations describing...
In this work, a deep submicron double-gate (DG) Gallium Nitride (GaN)-MESFET design and its 2-D threshold analytical model have been proposed and expected to suppress the short-channel-effects for deep submicron GaN-MESFET-based low power applications. The model predicts that the threshold voltage is greatly improved in comparison with the conventional Single-Gate GaN-MESFET. The developed approaches...
This paper presents that the degree of sequential diagnosability of an N-vertex Cayley graph is Ω(N/D) by generalizing a known technique of finding a lower bound for that of a CCC(cube-connected cycles), where D is the diameter of the Cayley graph. From the lower bound, it is shown that the degrees of sequential diagnosability of the N-vertex star graph and wrapped butterfly are Ω(N log log N/log...
This paper presents an optimization methodology for continuous time loop-filters design applied to Class-D amplifiers. The methodology is based on an evolutionary optimization approach which integrates both the topology selection and circuit sizing by automatically generating optimal sized topologies and performance tradeoffs for the Class-D amplifier. The presented approach is demonstrated for the...
An algorithm for multiparameter sensitivity analysis of a synthesized network based on a nullor model of active devices is implemented. It is simplified by using the modified Coates flow-graph. Due to the suggested method, additional information for parameter influence upon transmission coefficients in the circuit is obtained, all partial transfer functions and their products can be found. An example...
Nowadays, Sensor network is extensively practical in numerous fields including general engineering, agriculture and environmental monitoring, health monitoring and surgery [1]. Sensors are designed as increasingly efficient and Miniature. As a matter of fact, the most important factor in the design of RF communications is the size of the antenna [2]. In fact, Miniaturization will be subject to steady...
This paper presents a special package for Maple program designed for electric and electronic circuit analysis. The package contains functions for analysis of continuous-time linear and nonlinear circuits as well as periodically switched linear circuits. The method of analysis is based on modified nodal voltages method. Results can be obtained in symbolic or semisymbolic form. This contribution introduces...
In this paper, we propose a novel versatile engine for behavioral or transistor-level design verification of data converters. This tool is dedicated to IC designers to verify static performance of the converters during their design. It is based on advanced Servo-Loop method presented in and extended by features such as innovative DAC testing method (connecting ADC and DAC testing into one versatile...
The importance of symbolic analysis in the neural network approach to analog circuit fault diagnosis is discussed in this paper. Theoretical explanations and two explicative examples are presented, by taking into account the k-fault hypothesis.
On the basis of the modified nodal analysis, universal matrices-stamps are defined for modeling several types of current conveyor. From these stamps, the so-called Dragonfly Mason-Coates' graphs are derived for a fast hand-and-paper symbolic analysis of current-conveyor circuits.
Simple, compact low-cost microwave bandpass filters with strongly asymmetric characteristics, based on new topologies, are investigated, designed, fabricated and measured. A classical fourth-order filter or quadruplet, for example, has two transmission zeros located symmetrically, one on each side of the passband. A filter of the same order and, consequently, with a similar insertion loss, can offer...
A new two-dimensional analytical model for the potential distribution and depletion-layer width for the short-gate GaAs MESFET's has been presented in this paper. The solution of the two-dimensional Poisson's equation has been considered as the superposition of the solution of one-dimensional Poisson's equation in the lateral direction and the two-dimensional Laplace equation with suitable boundary...
This paper addresses the optimization of resource allocation based on Decode and Forward (DF) or Amplify and Forward (AF) relaying techniques for packet access Orthogonal Frequency Division Multiple Access (OFDMA) networks. A power allocation quasi-optimal solution with a low complexity has been proposed for the two forwarding techniques. To illustrate theirs performances, a selection of numerical...
The paper deals with the implementation of multi-domain symbolic analysis in a new program, SAMD (Symbolic Analysis of Mechatronic Drives), developed with the emphasis on linearized hybrid systems combining classical electrical circuits, controllers, electro-mechanical converters and mechanical parts of electric drives. The systems analyzed can be composed of both basic elements and more complex blocks...
This paper presents an extended CAD tool compatible with decananometric technologies for sizing OTA architectures. This is based on an extension of the gm/I methodology which uses, as inputs, parameters directly extracted from foundry models and can hence be easily ported to different technologies. This tool was developed in order to fasten and automate design for each OTA architecture. From fixed...
Due to the excellent control of DG MOSFETs over the short channel effects, they have been considered as a leading candidate to extend the scaling limit of conventional bulk MOSFETs. However, the hot carrier injection into gate oxides remains a potential problem in reliability field hence altering the device lifetime. In the present paper, a comprehensive drain current model incorporating hot-carrier-induced...
The paper deals with a method for accurate semisymbolic time-domain analysis of highly idealized linear lumped circuits. Pulse and step responses can be computed by means of the partial fraction decomposition. The procedure relies on an accurate computation of poles of the transfer function. The well known problem of the QR and QZ algorithms is their poor accuracy in the case of multiple roots. Moreover,...
It's widely recognized that Gate-All-Around (GAA) MOSFETs are considered among the most probable choices to continue CMOS performance boost beyond the conventional scaling frontiers. Such device offers the best controllability of short-channel effects claimed to be the predominant factor limiting how far the downscaling can be achieved. However, the lack of analytic compact models for degraded drain...
This brief presents a new structure of active inductors. These synthetic inductors are designed using current controlled voltage sources. The signal flow graph method is used for this purpose. For the practical realization, operational transresistance amplifiers (OTRAs) are replicated using current conveyors. The proposed inductors have very interesting properties because the value of its inductance...
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