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When designing in Smart Power technologies, TCAD simulations are mandatory to design effective passive protections against parasitic couplings due to minority carriers. The objective of this paper is to propose a spice-based approach to characterize electrical key parameters of a passive protection directly within standard IC design flow avoiding time consuming TCAD simulations. Our methodology consists...
The paper describes methodology for modelling and simulative estimation of sensitivity and range of ISM band Remote Keyless Entry transmitter-receiver system for automotive applications. The method is based on electrical simulation including PCB extraction data and parameters statistical distribution to evaluate best- and worst case scenarios. Both transmitter and receiver circuits are considered,...
Noise canceling techniques have been successfully applied to the design of modern multi-band RF-CMOS inductor-less receivers. However, low voltage supply requirements are imposing new design challenges which are pushing the operation of the MOS transistor into moderate or weak inversion, making the setup of closed sizing expressions a difficult task. This paper presents a Si2 OpenAccess based circuit...
Simulation of higher order nonlinear device currents in RF integrated circuits becomes crucial when high linearity is a design goal. Prediction of the nonlinear behavior of passive circuits like mixers, attenuators or switches play an important role in low-distortion designs, but also causes trouble due to the inability of threshold voltage based compact models to inherently model higher order nonlinearities...
Electro-thermal models are commonly used in simulations and designing MEMS devices, also in case of microbolometers. These models allow to estimate sensors performance before fabrication that consequently impacts on fabrication cost. Coupling of electric and thermal domains and building appropriate model for carrying out simulations are crucial to detect all phenomena having impact for Readout Integrated...
The performance of logic function could be affected significantly by the noise effect as the dimension of CMOS devices scales to nanometers. Thus, many pertinent researches about noise-tolerant logic gate have received growing attention. Considering the randomness as the noise's nature, probabilistic-based approach proves better noise-immunity and three design schemes with the technique of Markov...
This paper presents some of the issues of signal and power integrity in relation with appropriate modeling and simulation methods that are available. The clock signal of a communication protocol is experimentally tested in order to find the rules to improve its signal integrity (SI) along the paths on the printed circuit board (PCB). The signal and power integrity of this PCB are improved using a...
The recent surge of implantable and wearable medical devices have paved the way for realizing intra-body networks (IBNs). Traditional RF-based techniques fall short in wirelessly connecting such devices owing to absorption within body tissues. A different approach is known as galvanic coupling, which employs weak electrical current within naturally conducting tissues to enable intra-body communication...
In this paper, the equivalent circuit model of the return paths of common mode electromagnetic interference (EMI) noise currents from the motor drive system (MDS) in hybrid electric vehicle (HEV) is proposed. The proposed model includes three kinds of the return current paths: braided shield of three-phase cable, metallic vehicle body and the parasitic capacitance between the vehicle components. In...
A time-domain methodology for noise analysis of neural interface front-end with arbitrary deterministic neuron model excitations is presented. Rather than estimating noise behavior by a population of realizations, the neural interface front-end is described as a set of stochastic differential equations and closure approximations are introduced to obtain the noise variances, covariances and cross-correlations...
In this paper, we proposed a wideband common-mode suppression filter for multi differential signal pairs. The method of the proposed design is utilized by using Defected Ground Structure (DGS) of two quarter-wavelength resonators with the mutual coupling effect to achieve the wideband common-mode suppression. For observing one pair differential signal lines in the frequency domain analysis, the differential-mode...
In this work, conducted-noise propagation in a Power Line Communications (PLC) link implemented on a spacecraft dc power-bus and involving differential signaling is investigated by resorting to modal analysis. The study mainly focuses on the detrimental effects on conducted immunity owing to the imbalance possibly introduced by the power units and the PLC modems. To this end, a suitable circuit interpretation...
In this paper, the capability of quarter-wavelength (λ/4) line based bandstop structure for wideband noise isolation in power delivery network (PDN) applications is investigated. Two test boards are implemented using the standard printed circuit board (PCB) fabrication process, and the measured results show extremely wide stopbands from 1 to 40 GHz with 60 to 70 dB isolation.
In this paper, inductive feedback approach is applied for bandwidth extension of Common Source Transimpedance Amplifier. The effect of parasitic capacitances of the MOS transistor is reduced using this approach. The process of zero-pole cancellation for extending the bandwidth of the amplifier is explained. Moreover, a wideband three stage transimpedance amplifier based on common source amplifier...
BSIM4 model is not suitable for distortion analysis of circuits with bias point VDS = 0, such as passive mixers and RF switches, due to discontinuities in higher order derivatives. Surface potential based PSP model has continuous derivatives to at least third order, and is therefore suitable for intermodulation products simulation. This paper presents the BSIM4 to PSP model conversion flow and comparison...
A study on the coupling through substrate using the case of two square metal pads over bulk silicon substrate with epitaxial layer is presented. A lightly doped profile is adopted and it is simulated by means of an electromagnetic simulator for various pad distances and different metal layers, assuming a 65 nm bulk CMOS technology. Suggestions how to reduce the simulation time when a large number...
This paper focuses on the problem of single-channel noise reduction in a transient noise environment for speech enhancement application. A typical speech enhancement algorithm requires an estimate of the noise statistics. However, the problem of noise estimation is challenging when the statistics of the noise vary significantly with time. By exploiting the fact that for speech signal most of the energy...
Region-based level set methods have been widely used for image segmentation. Among them, the method based on local binary fitting (LBF) model is an efficient one. Unfortunately, LBF model is sensitive to initial contour. To overcome this disadvantage, we propose two explicit order models, i.e., the global order preserving and local order smoothness models. The global order preserving model ensures...
This paper reports the methodology and results of noise modeling and tests of a quartz crystal oscillator based on a dedicated integrated circuit (ASIC). Unfortunately, the phase noise of the inner sustaining amplifier is unknown. The challenge is to evaluate the performance limits of this ASIC in an oscillator circuit. The oscillator phase noise computation results from the knowledge of individual...
Extended Kalman filter (EKF) is a typical method for state-of-charge (SOC) estimation of lithium batteries. An equivalent circuit model for the lithium battery is established, and model parameters are identified by experimental methods. Based on the battery model and model parameters, an EKF is proposed for SOC estimation. Analysis is conducted on the effect of the model coefficients of EKF to the...
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