Modeling of a Second Order Sigma-Delta Modulator with Imperfections

Dendouga, Abdelghani; Bouguechal, Nour-Eddine; Kouda, Souhil; Barra, Samir

doi:10.15676/ijeei.2011.3.2.9

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…(2) Where gmi and roi are respectively the transconductance of Mi transistor for i = (4, 5, 10) and the drain-source resistance of Mi device for i = (1,4,5,7,9,10). As a result, the open loop gain of the Regulated Telescopic OTA circuit is expressed as:…”

Section: Regulated Telescopic Ota Optimizationmentioning

confidence: 99%

“…The growing demand for high-speed and high-precision analog integrated circuits dictates stringent design specifications for the amplifiers which are the basic building blocks for numerous applications. In fact, high performance analog-to-digital converters (ADCs) require OTA circuit with very high DC gain and gain-bandwidth product (GBW), to meet both accuracy and fast settling requirements of the systems [1]. In addition, high-gain amplifiers use cascode structures or multi-stage designs with long channel length transistors biased at low current levels, while, high-bandwidth amplifiers use single-stage designs with short channel length transistors biased at high current levels [2].…”

Section: Introductionmentioning

confidence: 99%

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Regulated Telescopic OTA Optimization for Mobile WiMAX Applications. Nano CMOS OTA Performance Prediction Through Bisquare Weights Method

Mallek¹,

Daoud²,

Mnif³

et al. 2019

ijeei

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This paper presents the design of a high performance Regulated Telescopic Operational Transconductance Amplifier (OTA) for low power and high speed sigma-delta modulator for Mobile WiMAX Applications. Indeed, the Regulated Telescopic OTA is an enhanced DC gain Telescopic circuit with the gate voltage of the cascode transistor is controlled by a feedback amplifier. An algorithmic driven methodology is developed ending to the optimal transistor geometries. Moreover, the proposed OTA was post-layout simulated for some process corners, temperature variation and Monte-Carlo analysis. The post-layout simulation results have achieved a DC gain of 66dB, a large GBW of 862MHz with a phase margin of 58degrees with only 6.24mW power consumption. In addition, the use of a robust Bisquare Weights (BW) method is investigated to predict the Regulated Telescopic OTA performance for new generation systems. Then, the impact of Nanometer CMOS on Regulated Telescopic OTA design is highlighted. It shows the potentialities of future CMOS processes to provide high speed and high performance OTA circuit.

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Section: Regulated Telescopic Ota Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regulated Telescopic OTA Optimization for Mobile WiMAX Applications. Nano CMOS OTA Performance Prediction Through Bisquare Weights Method

Mallek¹,

Daoud²,

Mnif³

et al. 2019

ijeei

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show abstract

“…The behaviour of higher order multibit Σ∆-converters with imperfections can be modelled based on the work of Dendouga [5] and Koe [6]. As shown by Koe [6], the clock jitter, the switchedcapacitor kT/C-noise, the amplifier thermal noise and the amplifier DC gain have an influence on the signal to noise ratio (SNR).…”

Section: Data Acquisitionmentioning

confidence: 99%

Analysis of Signal Processing Algorithms of Coriolis Mass Flowmeters

Ruoff¹,

Gauchel²,

Heinz

2014

KEM

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For fast and precise flow measurement using coriolis flowmeters it is necessary to accurately determinate the phase difference between two noisy position signals. These signals are digitized and filtered before being processed by phase tracking algorithms. This work investigates the influence of discretization and noise shaping on different phase tracking methods and their estimation efficiency, computational complexity, real-time performance and memory requirements.

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“…The equations (3) and (4) show that if we wishes to reduce the thermal noise power, then we must increase the value of the sampling capacity Cs [7]. Thus the total noise can be evaluated by the following equation:…”

Section: A Switches Thermal Noisementioning

confidence: 99%

“…For a MOS transistor in saturation, the voltage generator noise equivalent to the two sources is given by [7]: ≈ 2…”

Section: B Operational Amplifier Noisementioning

confidence: 99%

Behavioral Analysis of Second Order Sigma-Delta Modulator for Low frequency Applications

Samanta¹

2013

IOSR-JCE

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Modeling of a Second Order Sigma-Delta Modulator with Imperfections

Cited by 5 publications

References 2 publications

Regulated Telescopic OTA Optimization for Mobile WiMAX Applications. Nano CMOS OTA Performance Prediction Through Bisquare Weights Method

Regulated Telescopic OTA Optimization for Mobile WiMAX Applications. Nano CMOS OTA Performance Prediction Through Bisquare Weights Method

Analysis of Signal Processing Algorithms of Coriolis Mass Flowmeters

Behavioral Analysis of Second Order Sigma-Delta Modulator for Low frequency Applications

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