In this paper, a method based on some test signal (Test Signal Method) is developed to find the dominant oscillating frequencies and dampings associated with any generator in the system. The method can be realized easily by time domain simulation using electromechanical transient programs. The theoretical background of the test signal method is the theory of mechanical admittance and mode ident...

A thorough investigation of N-channel multifinger MOSFET capacitances in dark and under optical illumination is presented in this paper. The intrinsic and extrinsic capacitances are modelled and analysed considering the scaling effects for sub-micron scale MOSFET. Bias dependence is taken into account and capacitances essential for small signal model for RF frequency operation are evaluated. Th...

2014 A small-signal cell-model of the CCD is proposed, which is shown to account fully for frequency-response and noise performances of the device. The analysis applies both to shiftregister (analog or digital) structures and to imaging CCDs, and includes the effects of clock delay, transfer inefficiency, storage and transfer noises, and sampling-generated aliasing (Moiré). REVUE DE PHYSIQUE AP...

— The minimum mean-square error of the estimation of a non-Gaussian signal where observed from an additive white Gaussian noise (WGN) channel's output, is analyzed. First, a quite general time-continuous channel model is assumed for which the behavior of the non-Gaussianess of the channel's output for small signal to noise ratio q, is proved. Then, It is assumed that the channel input's signal ...

Sampled-data modeling and analysis are applied to PWM dc–dc converters under one-cycle control or its special case, charge control. These two control schemes are analyzed in a unified framework. Large-signal analysis, steady-state analysis and small-signal analysis are addressed analytically. The orbital nature of the nominal periodic solution is preserved. Various transfer functions are derive...

Recently, small-signal microwave performance has been reported for PNP InAlAs/InGaAs HBTs [1, 2]. While power performance of PNP AlGaAs/GaAs HBTs has been demonstrated [3], nothing has been reported on power performance of PNP HBTs in the InP material system. In this work, InAlAs/InGaAs PNP HBTs were fabricated and subsequently characterized under large signal conditions at X-band to determine ...

This paper presents a small signal stability analysis to assess the issues facing PV (photovoltaic) inverters connected weak grid. It is revealed that cause of transient instabilities, either high-frequency or low-frequency oscillations, dominated by outer control loops and grid strength. However, most challenging oscillations are induced coupling interaction between loop controller PLL (Phase-...

Current mode (ECL) logic has long been the option of choice in those applications requiring logic functions at multigigahertz rates. This trend continues despite the obvious very high static power consumption and small signal swing characterizing this logic. In this work we investigate a simple mechanism for LowVoltage-Swing Logic (LVSL) to greatly reduce the power requirement of a CML logic su...

Traditional lumped small signal equivalent circuit models of AlGaN/GaN metal oxide semiconductor high electron mobility transistors (MOS-HEMTs) are made up constant valued elements. Such unable to capture the frequency behavior (above 20 GHz) device. In this work, a modified model MOS-HEMTs is presented. The key feature proposed that values different elements in considered be dependent nature a...

Small-signal microwave transistor characteristics are used to construct and fit a comprehensive model of their dynamic behaviour. The model includes thermal effects and trap-related effects, which influences such a large range of frequencies that they are not well characterized by large-signal or pulse measurements alone. Correlation of the model with smallsignal characteristics demonstrates th...