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Showing 1-25 of 82,703 resultsfor "Index Terms":Circuit noise
"Index Terms":Circuit noise
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A numerical technique for time domain noise analysis of oscillators
M.M. Gourary;S.G. Rusakov;S.L. Ulyanov;M.M. Zharov;K.K. Gullapalli;B.J. Mulvaney
2007 18th European Conference on Circuit Theory and Design
Year: 2007 | Conference Paper |
Cited by: Papers (1)
A new numerical technique for time domain noise analysis of oscillators is proposed. This technique is based on the linear periodically time varying model, with an equivalent transformation of the linear system. This transformation produces a nonsingular matrix when the frequency offset is zero, which avoids numerical errors at small offset frequencies. Examples are given to demonstrate the effici...Show More
Simulation and measurement of supply and substrate noise in mixed-signal ICs
B.E. Owens;S. Adluri;P. Birrer;R. Shreeve;S.K. Arunachalam;K. Mayaram;T.S. Fiez
Digital noise in mixed-signal circuits is characterized using a scalable macromodel for substrate noise coupling. The noise coupling obtained through simulations is verified with measured data from a digital noise generator and noise sensitive analog circuits fabricated in the 0.35-/spl mu/m heavily doped CMOS process. The simulations and measurements also demonstrate the effectiveness of includin...Show More
Substrate Noise Coupling in SoC Design: Modeling, Avoidance, and Validation
Ali Afzali-Kusha;Makoto Nagata;Nishath K. Verghese;David J. Allstot
Issues related to substrate noise in system-on-chip design are described including the physical phenomena responsible for its creation, coupling transmission mechanisms and media, parameters affecting coupling strength, and its impact on mixed-signal integrated circuits. Design guidelines and best practices to minimize the generation, transmission, and reception of substrate noise are outlined, an...Show More
Ultra-Low-Noise High-Input Impedance Amplifier for Low-Frequency Measurement Applications
The design of a low-frequency high-input-impedance amplifier having probably the lowest noise ever reported is presented. The amplifier's frequency range is from about 0.07 Hz to about 110 kHz at the -3-dB level. The equivalent input noise voltage spectral density is about 5.6, 1.4, 0.6, and 0.5 nV/radicHz at frequencies 0.1, 1, 10, and 1000 Hz, respectively. Gain of the amplifier is about 83 dB. ...Show More
Low-Frequency Noise Phenomena in Switched MOSFETs
Arnoud P. van der Wel;Eric A. M. Klumperink;Jay S. Kolhatkar;Eric Hoekstra;Martijn F. Snoeij;Cora Salm;Hans Wallinga;Bram Nauta
In small-area MOSFETs widely used in analog and RF circuit design, low-frequency (LF) noise behavior is increasingly dominated by single-electron effects. In this paper, the authors review the limitations of current compact noise models which do not model such single-electron effects. The authors present measurement results that illustrate typical LF noise behavior in small-area MOSFETs, and a mod...Show More
Extraction of Microwave FET Noise Parameters Using Frequency- Dependent Equivalent Noise Temperatures
W. Ciccognani;F. Giannini;E. Limiti;A. Nanni;A. Serino;C. Lanzieri;M. Peroni
2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference
Year: 2007 | Conference Paper |
Cited by: Papers (3)
A method for determining the noise parameters of high frequency field-effect transistors is presented. It has been developed by expressing the chain correlation matrix of the device as a function of its H-parameters and two frequency- dependent equivalent noise temperatures. The noise temperatures are determined utilizing the H-parameters and the 50 Omega noise figure of the device measured at a n...Show More
An Active Guarding Circuit Design for Wideband Substrate Noise Suppression
In this paper, an active guarding circuit is presented for wideband substrate noise suppression. A feed-forward compensation mechanism is proposed to extend the noise suppression bandwidth and to adjust the amplitude of phase-inversed noise cancellation current by introducing a zero and an amplitude controller. A noise decoupling mechanism is developed to provide a decoupling path and to sense the...Show More
An estimate of integrated signal-to-noise ratio (SNR) of the combination of the reader element with associated shunt-parallel resistance and magnetic medium through the interconnect, flexible printed circuit, and preamp is developed. A key result is the noise figure (NF) that relates the integrated input and output SNR of the system. Total common mode rejection or ground noise rejection is estimat...Show More
Generalized Linear Periodic Time-Varying Analysis for Noise Reduction in an Active Mixer
A simple linear periodic time-varying circuit model is proposed to rigorously analyze the noise behavior in an active mixer. This analysis can be shown to be a generalization of existing LPTV mixer models, which assume that the mixer is a memoryless device and, as a result, is valid for low frequency only. Based on the proposed LPTV circuit model, explicit formulas for noise figure that accounts f...Show More
Compact Large-Signal Shot-Noise Model for HBTs
Matthias Rudolph;Falk Korndorfer;Peter Heymann;Wolfgang Heinrich
A new description of the shot noise in HBTs is proposed that accounts for the correlation of the sources. It can easily be included in large-signal models, thus significantly improving the RF noise description. Common nonlinear bipolar transistor models thus far neglect the correlation, which deteriorates the model accuracy towards higher frequencies. It is shown that the collector delay in InGaP/...Show More
On Compact HBT RF Noise Modeling
2007 IEEE/MTT-S International Microwave Symposium
Year: 2007 | Conference Paper |
Cited by: Papers (9)
Accurate RF noise modeling of heterojunction bipolar transistors requires a proper model for the correlation of the shot-noise sources based on the respective time constant. This is incompatible with the present large-signal models, which, therefore, rely on non-correlated shot-noise sources and are not capable of predicting the RF noise with sufficient accuracy. In this paper, we propose a new co...Show More
This paper provides an overview on the major issues in the high-frequency noise characterization of deep submicron MOSFETs for RF IC applications. It includes the HF noise parameter measurements, test structure design, parameter de-embedding, noise source extraction, physics-based noise models and noise sources implementations.Show More
Accurate and efficient simulation of synchronous digital switching noise in systems on a chip
A new method is presented to compress switching information in large synchronous digital circuits. This is combined with an efficient generation of digital cell library noise signatures and results in an accurate estimation of the switching noise in digital circuits. It provides a practical approach to generating the digital switching noise for simulating substrate coupling noise in mixed-signal I...Show More
Evolution of substrate noise generation mechanisms with CMOS technology scaling
M. Badaroglu;P. Wambacq;G. Van der Plas;S. Donnay;G.G.E. Gielen;H.J. De Man
Substrate noise is a major obstacle for single-chip integration of mixed-signal systems. To reduce this problem and to assess its evolution with CMOS technology scaling, the different mechanisms that generate substrate noise and their dependencies on different parameters need to be well understood. In this paper, we show that with downscaling of the technology, substrate noise due to supply coupli...Show More
A comparison by simulation and by measurement of the substrate noise generated by CMOS, CSL, and CBL digital circuits
Current-steering logic (CSL) and current-balanced logic (CBL) are logic families that have been proposed with the objective of reducing the substrate noise in mixed-signal integrated circuits. These two families are compared here with conventional CMOS by simulation, using a substrate model extracted from the layouts, and also by measurements on a test chip. With small, low-power cells, noise redu...Show More
This paper presents a fully-differential front-end amplifier. The differential cross coupling with tail current is exploited as noise canceling circuitry to improve the Noise Figure (NF). The proposed front-end amplifier is designed with 0.13 um CMOS technology under the supply voltage of 1.2 V. Simulation results show NF of 2.1 dB. The voltage gain and bandwidth of the amplifier are 19.7 dB and 1...Show More
Active cancellation of acoustic noise using a self-tuned filter
In an increasingly noisy society, methods of reducing noise are becoming more important. This work proposes an analog electroacoustic circuit for active control of narrow-band low-frequency acoustic noise using adaptive filtering techniques. The circuit aims at producing antinoise, which is acoustically added to the disturbing noise to produce an error signal that is fed back to the circuit. The p...Show More
Experimental Evaluation of Signal-to-Noise Ratio of Sigma-Delta Modulator for Superconducting Analog-to-Digital Converter
We designed a superconducting front-end circuit for an analog-to-digital converter and experimentally evaluated its signal-to-noise-ratio (SNR) at a sampling frequency of 10 GHz. The modulator was based on a first-order sigma-delta modulation with an LR integrator. Correct noise shaping was experimentally confirmed, and an SNR of 70.9 dB at a bandwidth of 10 MHz was achieved. In the circuit design...Show More
An Analytic Circuit-Based Model for White and Flicker Phase Noise in LC Oscillators
A general circuit-based model of LC oscillator phase noise applicable to both white noise and 1/f noise is presented. Using the Kurokawa theory, differential equations governing the relationship between amplitude and phase noise at the tank are derived and solved. Closed form equations are obtained for the IEEE oscillator phase noise for both white and 1/f noise. These solutions introduce new para...Show More
Study and Analysis of Noise in CMOS Circuit Design using C5 model process technology
2018 International Conference on Advanced Computation and Telecommunication (ICACAT)
Year: 2018 | Conference Paper |
Noise behavior in microelectronic devices is mainly contributed by shot noise, thermal noise and flicker noises, avalanche noise and burst noises etc. Other factors that constitute to noise are various generation and recombination procedures, power lines and scaling technology associated in CMOS designs. Thermal noise or noise due to thermal agitations with flicker noise are the primary noise sour...Show More
An Approach to Determine Noise Model Parameter for Submicron MOSFET from RF Noise Figure Measurement
An extraction method to obtain the noise model parameter T_{\mathrm { d}} in deep submicron MOSFETs directly from radio frequency (RF) scattering parameters and noise figure measurements is presented. A simplified noise equivalent circuit, along with closed-form solutions to calculate the RF noise figure of MOSFET is developed. On-wafer experimental verification is presented and a comparison w...Show More
Design-oriented estimation of thermal noise in switched-capacitor circuits
Thermal noise represents a major limitation on the performance of most electronic circuits. It is particularly important in switched circuits, such as the switched-capacitor (SC) filters widely used in mixed-mode CMOS integrated circuits. In these circuits, switching introduces a boost in the power spectral density of the thermal noise due to aliasing. Unfortunately, even though the theory of nois...Show More
On the simulation of low-frequency noise upconversion in InGaP/GaAs HBTs
Residual phase-noise measurements of GaAs heterojunction bipolar transistors (HBTs) with different low-frequency noise properties are used to investigate how accurate a compact HBT model can predict the upconversion of low-frequency noise under nonlinear operation. We find that the traditional low-frequency source implementation, as well as a cyclostationary noise source implementation, have short...Show More
A 1.2-V Highly Linear Balanced Noise-Cancelling LNA in 0.13-\mu{\hbox{m}} CMOS
In this paper, a current-to-voltage combiner is proposed to realize a highly linear, balanced noise-cancelling low-noise amplifier (LNA) capable of low-voltage operation. The current-to-voltage combiner, implemented in the load of the amplifier, converts the output currents of the parallel common-gate (CG) and common-source (CS) stages of the LNA to voltages, equalizes the amplitudes of the voltag...Show More
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