Limitations And Optimization Of A Blind Calibration Algorithm For Nonlinearity In Analog To Digital Converters
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Limitations And Optimization Of A Blind Calibration Algorithm For Nonlinearity In Analog To Digital Converters
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Author : Brandilyn Coker
language : en
Publisher:
Release Date : 2015
Limitations And Optimization Of A Blind Calibration Algorithm For Nonlinearity In Analog To Digital Converters written by Brandilyn Coker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Analog-to-digital converters categories.
Analog to digital converters (ADCs) are a critical part of communication between the physical world and the increasingly digital systems humans use every day. ADCs have inherent non-idealities that degrade performance. Nonlinearity is one of the most prevalent non-idealities that designers face. While calibration methods for nonlinearity exist in the analog domain, digital calibration is preferred since it typically takes less resources (chip area, power consumption) and can be implemented off chip if need be. A blind digital calibration algorithm for nonlinearity correction in ADCs was developed at Oregon State University that continuously corrects harmonic distortion using the concepts of downsampling and orthogonality of sinusoidal signals. It can calibrate for multiple harmonics simultaneously with no need for an external test signal. This work explores the blind calibration algorithm in order to determine some of the limitations inherent to both the theoretical design and with respect to a practical implementation in hardware. Based upon these limitations, various methods of algorithm optimization were characterized through discussion of design trade-offs and ways to improve performance.
A Calibration Service For Analog To Digital And Digital To Analog Converters
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Author : T. Michael Souders
language : en
Publisher:
Release Date : 1981
A Calibration Service For Analog To Digital And Digital To Analog Converters written by T. Michael Souders and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Analog-to-digital converters categories.
Digital Calibration Algorithms For Nyquist Rate Analog To Digital Converters
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Author : Anup Savla
language : en
Publisher:
Release Date : 2004
Digital Calibration Algorithms For Nyquist Rate Analog To Digital Converters written by Anup Savla and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Analog-to-digital converters categories.
Abstract: Continuous scaling down of CMOS device sizes and an accompanied increase in device switching speeds prompts the design of mixed-signal systems with increasingly complex digital signal processing and control algorithms accompanied by simpler analog circuitry. Analog to digital converter (ADC) is an essential mixed-signal component of modern receivers, where signals sensed from the source are converted to digital for further signal processing on them. In this dissertation, calibration techniques are presented which allow ADCs to be designed with large inherent gain and offset errors. The concept of arbitrary radix multistep conversion is presented, along with algorithms that enable reduced radix conversion with digital correction in pipelined or algorithmic ADCs. Calibration techniques that account for linear and nonlinear gain error are presented and adapted to the popular 1.5 bit/stage pipeline architecture. Calibration is performed purely with digital post-processing on ADC output bits, with no changes occurring in the analog hardware. In this dissertation a WCDMA/WLAN receiver architecture is presented and specifications are derived for all its components. Concept of reconfigurable ADC design is presented, which allows speed and power consumption optimization. Reduced radix digital correction, linear and nonlinear calibration and background-calibrating queues are presented and combined in two behavioral models. The reconfigurable ADC was fabricated in AMI0.5u 3V CMOS process, and achieved 55dB dynamic range at 45MS/s, consuming 51mW power. The reconfigured calibrated ADC was simulated in TSMC 0.18u 1.8V CMOS process, and achieved 63dB dynamic range at 25MS/s, consuming 3.6mW power. Measurements of the capture card showed a 1.6bit improvement in resolution with the use of calibration algorithms.
Algorithms For Nonlinear Problems In Digital Communication
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Author : Jiadong Xu
language : en
Publisher:
Release Date : 2006
Algorithms For Nonlinear Problems In Digital Communication written by Jiadong Xu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Background Digital Calibration For Interstage Gain Errors And Memory Effects In Pipelined Analog To Digital Converters
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Author : John Patrick Keane
language : en
Publisher:
Release Date : 2004
Background Digital Calibration For Interstage Gain Errors And Memory Effects In Pipelined Analog To Digital Converters written by John Patrick Keane and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Digitally Assisted Pipeline Adcs
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Author : Boris Murmann
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08
Digitally Assisted Pipeline Adcs written by Boris Murmann and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-08 with Technology & Engineering categories.
Digitally Assisted Pipeline ADCs: Theory and Implementation explores the opportunity to reduce ADC power dissipation by leveraging digital signal processing capabilities in fine line integrated circuit technology. The described digitally assisted pipelined ADC uses a statistics-based system identification technique as an enabling element to replace precision residue amplifiers with simple open-loop gain stages. The digital compensation of analog circuit distortion eliminates one key factor in the classical noise-speed-linearity constraint loop and thereby enables a significant power reduction. Digitally Assisted Pipeline ADCs: Theory and Implementation describes in detail the implementation and measurement results of a 12-bit, 75-MSample/sec proof-of-concept prototype. The Experimental converter achieves power savings greater than 60% over conventional implementations. Digitally Assisted Pipeline ADCs: Theory and Implementation will be of interest to researchers and professionals interested in advances of state-of-the-art in A/D conversion techniques.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2007
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Dissertations, Academic categories.
Rf Imperfections In High Rate Wireless Systems
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Author : Tim Schenk
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-01-29
Rf Imperfections In High Rate Wireless Systems written by Tim Schenk and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-29 with Technology & Engineering categories.
This is one of the first books on the emerging research topic of digital compensation of RF imperfections. The book presents a new multidisciplinary vision on the design of wireless communication systems. In this approach the imperfections of the RF front-ends are accepted and digital signal processing algorithms are designed to suppress their impact on system performance. The book focuses on multiple-antenna orthogonal frequency division multiplexing (MIMO OFDM).
Neuromorphic Photonics
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Author : Paul R. Prucnal
language : en
Publisher: CRC Press
Release Date : 2017-05-08
Neuromorphic Photonics written by Paul R. Prucnal and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-08 with Science categories.
This book sets out to build bridges between the domains of photonic device physics and neural networks, providing a comprehensive overview of the emerging field of "neuromorphic photonics." It includes a thorough discussion of evolution of neuromorphic photonics from the advent of fiber-optic neurons to today’s state-of-the-art integrated laser neurons, which are a current focus of international research. Neuromorphic Photonics explores candidate interconnection architectures and devices for integrated neuromorphic networks, along with key functionality such as learning. It is written at a level accessible to graduate students, while also intending to serve as a comprehensive reference for experts in the field.
Pipeline Adc Design Methodology
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Author : Hui Zhao
language : en
Publisher:
Release Date : 2012
Pipeline Adc Design Methodology written by Hui Zhao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Analog-to-digital converters categories.