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A Fast Fourier Transform Based Digital Calibration Technique For Successive Approximation Register Analog To Digital Converters
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Book Synopsis A Fast-Fourier-Transform-Based Digital Calibration Technique for Successive-Approximation-Register Analog-to-Digital Converters by : 李育丞
Download or read book A Fast-Fourier-Transform-Based Digital Calibration Technique for Successive-Approximation-Register Analog-to-Digital Converters written by 李育丞 and published by . This book was released on 2018 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Digital Calibration Technique with Recursive Discrete Fourier Transform for Successive-Approximation Analog-to-Digital Converters by : 阮翌翔
Download or read book A Digital Calibration Technique with Recursive Discrete Fourier Transform for Successive-Approximation Analog-to-Digital Converters written by 阮翌翔 and published by . This book was released on 2016 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis All Digital, Background Calibration for Time-Interleaved and Successive Approximation Register Analog-to-Digital Converters by : Christopher Leonidas David
Download or read book All Digital, Background Calibration for Time-Interleaved and Successive Approximation Register Analog-to-Digital Converters written by Christopher Leonidas David and published by . This book was released on 2010 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The growth of digital systems underscores the need to convert analog information to the digital domain at high speeds and with great accuracy. Analog-to-Digital Converter (ADC) calibration is often a limiting factor, requiring longer calibration times to achieve higher accuracy. The goal of this dissertation is to perform a fully digital background calibration using an arbitrary input signal for A/D converters. The work presented here adapts the cyclic "Split-ADC" calibration method to the time interleaved (TI) and successive approximation register (SAR) architectures. The TI architecture has three types of linear mismatch errors: offset, gain and aperture time delay. By correcting all three mismatch errors in the digital domain, each converter is capable of operating at the fastest speed allowed by the process technology. The total number of correction parameters required for calibration is dependent on the interleaving ratio, M. To adapt the "Split-ADC" method to a TI system, 2M+1 half-sized converters are required to estimate 3(2M+1) correction parameters. This thesis presents a 4:1 "Split-TI" converter that achieves full convergence in less than 400,000 samples. The SAR architecture employs a binary weight capacitor array to convert analog inputs into digital output codes. Mismatch in the capacitor weights results in non-linear distortion error. By adding redundant bits and dividing the array into individual unit capacitors, the "Split-SAR" method can estimate the mismatch and correct the digital output code. The results from this work show a reduction in the non-linear distortion with the ability to converge in less than 750,000 samples.
Book Synopsis A Full Range Digital Calibration in 12-bit Successive Approximation Register Analog-to-Digital Converter by : 林葦婷
Download or read book A Full Range Digital Calibration in 12-bit Successive Approximation Register Analog-to-Digital Converter written by 林葦婷 and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis All Digital Calibration for High-resolution Successive-approximation Register Analog-to-digital Converter by : 廖亦勛
Download or read book All Digital Calibration for High-resolution Successive-approximation Register Analog-to-digital Converter written by 廖亦勛 and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methodology for the Digital Calibration of Analog Circuits and Systems by : Marc Pastre
Download or read book Methodology for the Digital Calibration of Analog Circuits and Systems written by Marc Pastre and published by Springer. This book was released on 2010-11-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methodology for the Digital Calibration of Analog Circuits and Systems shows how to relax the extreme design constraints in analog circuits, allowing the realization of high-precision systems even with low-performance components. A complete methodology is proposed, and three applications are detailed. To start with, an in-depth analysis of existing compensation techniques for analog circuit imperfections is carried out. The M/2+M sub-binary digital-to-analog converter is thoroughly studied, and the use of this very low-area circuit in conjunction with a successive approximations algorithm for digital compensation is described. A complete methodology based on this compensation circuit and algorithm is then proposed. The detection and correction of analog circuit imperfections is studied, and a simulation tool allowing the transparent simulation of analog circuits with automatic compensation blocks is introduced. The first application shows how the sub-binary M/2+M structure can be employed as a conventional digital-to-analog converter if two calibration and radix conversion algorithms are implemented. The second application, a SOI 1T DRAM, is then presented. A digital algorithm chooses a suitable reference value that compensates several circuit imperfections together, from the sense amplifier offset to the dispersion of the memory read currents. The third application is the calibration of the sensitivity of a current measurement microsystem based on a Hall magnetic field sensor. Using a variant of the chopper modulation, the spinning current technique, combined with a second modulation of a reference signal, the sensitivity of the complete system is continuously measured without interrupting normal operation. A thermal drift lower than 50 ppm/°C is achieved, which is 6 to 10 times less than in state-of-the-art implementations. Furthermore, the calibration technique also compensates drifts due to mechanical stresses and ageing.
Book Synopsis Digitally Assisted Techniques for Nyquist Rate Analog-to-Digital Converters by : Rabeeh Majidi
Download or read book Digitally Assisted Techniques for Nyquist Rate Analog-to-Digital Converters written by Rabeeh Majidi and published by . This book was released on 2015 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: With the advance of technology and rapid growth of digital systems, low power high speed analog-to- digital converters with great accuracy are in demand. To achieve high effective number of bits Analog-to-Digital Converter (ADC) calibration as a time consuming process is a potential bottleneck for designs. This dissertation presentsa fully digital background calibration algorithm for a 7- bit redundant flash ADC using split structure and look-up table based correction. Redundant comparators are used in the flash ADC design of this work in order to tolerate large offset voltages while minimizing signal input capacitance. The split ADC structure helps by eliminating the unknown input signal from the calibration path. The flash ADC has been designed in 180nm IBM CMOS technology and fabricated through MOSIS. This work was supported by Analog Devices, Wilmington, MA. While much research on ADC design has concentrated on increasing resolution and sample rate, there are many applications (e.g. biomedical devices and sensor networks) that do not require high performance but do require low power energy efficient ADCs. This dissertation also explores on design of a low quiescent current 100k Sps Successive Approximation (SAR) ADC that has been used as an error detection ADC for an automotive application in 350nm CD (CMOS-DMOS) technology. This work was supported by ON Semiconductor Corp, East Greenwich, RI.
Book Synopsis Digital Background Calibration of Analog-to-digital Converters Using a Calibration Queue by : Ozan Ersan Erdoğan
Download or read book Digital Background Calibration of Analog-to-digital Converters Using a Calibration Queue written by Ozan Ersan Erdoğan and published by . This book was released on 1999 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calibration Techniques in Nyquist A/D Converters by : Hendrik van der Ploeg
Download or read book Calibration Techniques in Nyquist A/D Converters written by Hendrik van der Ploeg and published by Springer Science & Business Media. This book was released on 2006-09-13 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book analyses different A/D-converter architectures with an emphasis on the maximum achievable power efficiency. It also provides an accessible overview of the state-of-the art in calibration techniques for Nyquist A/D converters. The calibration techniques presented are applicable to other analog-to-digital systems, such as those applied in integrated receivers. They allow implementation without introducing a speed or power penalty.
Book Synopsis A Calibration Service for Analog-to-digital and Digital-to-analog Converters by : T. Michael Souders
Download or read book A Calibration Service for Analog-to-digital and Digital-to-analog Converters written by T. Michael Souders and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fast Fourier Transforms by : C. Sidney Burrus
Download or read book Fast Fourier Transforms written by C. Sidney Burrus and published by Lulu.com. This book was released on 2012-11-30 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book uses an index map, a polynomial decomposition, an operator factorization, and a conversion to a filter to develop a very general and efficient description of fast algorithms to calculate the discrete Fourier transform (DFT). The work of Winograd is outlined, chapters by Selesnick, Pueschel, and Johnson are included, and computer programs are provided.
Book Synopsis Digital Calibration Algorithms for Nyquist-rate Analog to Digital Converters by : Anup Savla
Download or read book Digital Calibration Algorithms for Nyquist-rate Analog to Digital Converters written by Anup Savla and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Statistical Calibration for Two-step Analog-to-digital Conversion by : Yi-Long Yu
Download or read book Statistical Calibration for Two-step Analog-to-digital Conversion written by Yi-Long Yu and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a two-step, hybrid and reconfigurable data converter using statistical calibration. The two-step analog-to-digital converter (ADC) has a front-end successive-approximation register (SAR) ADC and a back-end time-domain (TD) ADC, which together form a hybrid converter. An inter-stage sample-and-hold amplifier (SHA) doubles the operating speed by allowing the operation to be pipelined. A reconfigurable characteristic allows the converter resolution to be adjusted to be 8, 10 or 12 bits. Digital statistical calibration of ADCs can be implemented without any changes to the analog circuits, which allows it to be compatible with the characteristics of scaled CMOS, allowing potential savings in area and power dissipation. Unfortunately, statistical calibration requires some assumptions about the input density. However, these assumptions are less restrictive in this work than in previous work for two reasons. First, statistical calibration of the mismatch in the front-end capacitor arrays requires only that the input distribution be smooth (instead of requiring that the input be known as in previous work). Also, statistical calibration of inter-stage and back-end errors relies on the assumption that the residue or quantization error from the first stage is uniformly distributed. This residue characteristic holds for many ADC inputs and is intuitively explained in this thesis. To demonstrate the statistical calibration, a prototype ADC is fabricated in 40-nm CMOS technology. In the 12-bit mode at 20 MS/s, the maximum SNDR is 59 dB before calibration and 68 dB after calibration, using 6.2 fJ per conversion-step, excluding the power dissipation required by the calibration and 9.1 fJ per conversion-step including the estimated power dissipation for the calibration.
Book Synopsis A Background Digital Calibration Technique for Oversampling Delta/Sigma Analog to Digital Converters with 2-bit Internal Quantizers by : José S. Niell
Download or read book A Background Digital Calibration Technique for Oversampling Delta/Sigma Analog to Digital Converters with 2-bit Internal Quantizers written by José S. Niell and published by . This book was released on 1995 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Digital Background Calibration of Analog to Digital Converters by : Bahar Jalali-Farahani
Download or read book Digital Background Calibration of Analog to Digital Converters written by Bahar Jalali-Farahani and published by Springer. This book was released on 2013 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital Background Calibration of Analog to Digital Converters takes a deep look at the digital calibration techniques in analog-to-digital converters. The problem of compensating for analog circuits impairments is divided into a system identification problem and an error compensation problem. Different approaches in modelling the analog impairments are discussed. Although Digital Background Calibration of Analog to Digital Converters focuses on two popular types of ADCs mainly: Pipeline and Sigma Delta the techniques can be easily used for any analog and mixed-signal design. Design examples are provided that support the theory and show the application of these techniques in designing high performance data acquisitions systems for wireless communication systems, bio-implantable devices and space electronics.
Book Synopsis Blind Calibration for Time-interleaved Analog-to-digital Converters by : Yuhui Huang
Download or read book Blind Calibration for Time-interleaved Analog-to-digital Converters written by Yuhui Huang and published by . This book was released on 2006 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Regularized Fast Hartley Transform by : Keith Jones
Download or read book The Regularized Fast Hartley Transform written by Keith Jones and published by Springer Science & Business Media. This book was released on 2010-03-10 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most real-world spectrum analysis problems involve the computation of the real-data discrete Fourier transform (DFT), a unitary transform that maps elements N of the linear space of real-valued N-tuples, R , to elements of its complex-valued N counterpart, C , and when carried out in hardware it is conventionally achieved via a real-from-complex strategy using a complex-data version of the fast Fourier transform (FFT), the generic name given to the class of fast algorithms used for the ef?cient computation of the DFT. Such algorithms are typically derived by explo- ing the property of symmetry, whether it exists just in the transform kernel or, in certain circumstances, in the input data and/or output data as well. In order to make effective use of a complex-data FFT, however, via the chosen real-from-complex N strategy, the input data to the DFT must ?rst be converted from elements of R to N elements of C . The reason for choosing the computational domain of real-data problems such N N as this to be C , rather than R , is due in part to the fact that computing equ- ment manufacturers have invested so heavily in producing digital signal processing (DSP) devices built around the design of the complex-data fast multiplier and accumulator (MAC), an arithmetic unit ideally suited to the implementation of the complex-data radix-2 butter?y, the computational unit used by the familiar class of recursive radix-2 FFT algorithms.
