Micropower Incremental Analog To Digital Converters
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| Author | : Chia-Hung Chen |
| Publisher | : |
| Total Pages | : 68 |
| Release | : 2013 |
| Genre | : Analog-to-digital converters |
| ISBN | : |
Incremental ADCs (IADCs) have many advantages for low-frequency high-accuracy data conversion--they are easy to multiplex between channels, need simpler digital decimation filter, and allow extended counting with a Nyquist-rate ADC. A single-loop incremental ADC was designed and fabricated in 90 nm for a biosensor interface circuit. It incorporates one integrator, and uses noise-coupling technique to achieve second-order noise-shaping. The use of feed-forward coupling and multi-bit internal quantizer allows low swing at the integrator, and hence low-power operation. The measured SNR is 74 dB within a signal bandwidth 2 kHz, and a 14 [mu]W power consumption. A new two-step IADC was proposed for 250 Hz bandwidth sensor interface circuits. It extends the order of a conventional incremental ADC from N to (2N-1) by way of a two-step operation. However, it only needs the same circuitry as the Nth-order IADC. A second-order loop filter was designed and fabricated by 2.5V I/O devices in 65 nm to demonstrate this concept to achieve third-order noise-shaping performance. Operated at sampling frequency 96 kHz, the measured dynamic range is 99.8 dB relative to a maximum input 2.2 VPP. The measured maximum SNDR was 91 dB with a 2.2 V[subscript PP] input amplitude. The ADC core area is 0.2 mm2, and the IADC consumed only 11.7 [mu]W. A new incremental ADC with multi-step extended-counting was proposed for sensor interface conversion. A 1st-order feedforward modulator was used for the coarse conversion, and the residue voltage was quantized by re-using the modulator for the fine conversion. Then, the circuit was re-configured as a counting ADC to quantize the residue voltage. The three steps of the circuits perform 15-bit quantization by 5-bit/step. A first-order IADC could only achieve 6.6-bit performance within the same conversion time of 96 clock periods. Reusing the first-order circuits, extra 8.4-bit is thus achieved.
| Author | : Chia-Hung Chen |
| Publisher | : John Wiley & Sons |
| Total Pages | : 164 |
| Release | : 2023-12-19 |
| Genre | : Technology & Engineering |
| ISBN | : 1394178387 |
Comprehensive resource discussing operating principles, available architectures, and design of micropower incremental analog-to-digital converters (IADCs) Incremental Data Converters for Sensor Interfaces describes the motivation for using incremental analog-to-digital converters (IADCs), including the theoretical foundations of their operation, the trade-offs in their use, and the practical issues in the circuit analysis and design of IADCs. The text covers core foundational knowledge such as the key algorithms used, circuits for single-stage and multi-stage IADCs, the design of the digital post filters for single- and multi-stage IADCs, IADC applications in measurement and instrumentation, medicine, imagers, and IoT, and comparison of delta-sigma (D-S) and incremental ADCs (IADCs) in terms of accuracy, latency, and multiplexed operation. To aid in reader comprehension and serve as an excellent classroom learning resource, Incremental Data Converters for Sensor Interfaces includes in-text problems and homework for graduate studies, along with helpful computer codes in MATLAB and Simulink. Additional topics covered in Incremental Data Converters for Sensor Interfaces include: Sensors and sensor interfaces, mixed-mode (analog–digital) communication and consumer signal chains, and ADC algorithms Quantization errors vs. quantization noise, and performance parameters and figures of merit, including resolution, linearity, accuracy, bandwidth, latency, and power dissipation Nyquist-rate and oversampling data converters, noise-shaping ADCs, and basic architectures for IADCs, including single- and multi-stage designs and discrete vs. continuous-time operation Loop filter design, D/A converter design, dynamic element matching and digital calibration, and quantizer design With comprehensive coverage of foundational knowledge surrounding the subject, various real-world examples, and helpful learning aids, Incremental Data Converters for Sensor Interfaces is an essential resource for graduate students in electronics programs, along with industrial circuit design professionals.
| Author | : Shanthi Pavan |
| Publisher | : John Wiley & Sons |
| Total Pages | : 596 |
| Release | : 2017-01-24 |
| Genre | : Technology & Engineering |
| ISBN | : 1119258278 |
This new edition introduces operation and design techniques for Sigma-Delta converters in physical and conceptual terms, and includes chapters which explore developments in the field over the last decade Includes information on MASH architectures, digital-to-analog converter (DAC) mismatch and mismatch shaping Investigates new topics including continuous-time ΔΣ analog-to-digital converters (ADCs) principles and designs, circuit design for both continuous-time and discrete-time ΔΣ ADCs, decimation and interpolation filters, and incremental ADCs Provides emphasis on practical design issues for industry professionals
| Author | : Kofi A.A. Makinwa |
| Publisher | : Springer |
| Total Pages | : 332 |
| Release | : 2015-08-28 |
| Genre | : Technology & Engineering |
| ISBN | : 3319211854 |
This book is based on the 18 tutorials presented during the 24th workshop on Advances in Analog Circuit Design. Expert designers present readers with information about a variety of topics at the frontier of analog circuit design, including low-power and energy-efficient analog electronics, with specific contributions focusing on the design of efficient sensor interfaces and low-power RF systems. This book serves as a valuable reference to the state-of-the-art, for anyone involved in analog circuit research and development.
| Author | : Andrea Baschirotto |
| Publisher | : Springer Nature |
| Total Pages | : 324 |
| Release | : 2019-10-24 |
| Genre | : Technology & Engineering |
| ISBN | : 3030252671 |
This book is based on the 18 tutorials presented during the 28th workshop on Advances in Analog Circuit Design. Expert designers present readers with information about a variety of topics at the frontier of analog circuit design, including next-generation analog-to-digital converters , high-performance power management systems and technology considerations for advanced IC design. For anyone involved in analog circuit research and development, this book will be a valuable summary of the state-of-the-art in these areas. Provides a summary of the state-of-the-art in analog circuit design, written by experts from industry and academia; Presents material in a tutorial-based format; Includes coverage of next-generation analog-to-digital converters, high-performance power management systems, and technology considerations for advanced IC design.
| Author | : Marcel J.M. Pelgrom |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 469 |
| Release | : 2010-07-24 |
| Genre | : Technology & Engineering |
| ISBN | : 9048188881 |
A book is like a window that allows you to look into the world. The window is shaped by the author and that makes that every window presents a unique view of the world. This is certainly true for this book. It is shaped by the topics and the projects throughout my career. Even more so, this book re?ects my own style of working and thinking. That starts already in Chap. 2. When I joined Philips Research in 1979, many of my colleagues used little paper notebooks to keep track of the most used equations and other practical things. This notebook was the beginning for Chap. 2: a collection of topics that form the basis for much of the other chapters. Chapter2 is not intended to explain these topics, but to refresh your knowledge and help you when you need some basics to solve more complex issues. In the chapters discussing the fundamental processes of conversion, you will r- ognize my preoccupation with mathematics. I really enjoy ?nding an equation that properly describes the underlying mechanism. Nevertheless mathematics is not a goalonitsown:theequationshelptounderstandthewaythevariablesareconnected to the result. Real insight comes from understanding the physics and electronics. In the chapters on circuit design I have tried to reduce the circuit diagrams to the s- plest form, but not simpler. . . I do have private opinions on what works and what should not be applied.
| Author | : Kien Beng Tan |
| Publisher | : |
| Total Pages | : 128 |
| Release | : 1996 |
| Genre | : |
| ISBN | : |
| Author | : Amir Zjajo |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 311 |
| Release | : 2010-10-29 |
| Genre | : Technology & Engineering |
| ISBN | : 9048197252 |
With the fast advancement of CMOS fabrication technology, more and more signal-processing functions are implemented in the digital domain for a lower cost, lower power consumption, higher yield, and higher re-configurability. This has recently generated a great demand for low-power, low-voltage A/D converters that can be realized in a mainstream deep-submicron CMOS technology. However, the discrepancies between lithography wavelengths and circuit feature sizes are increasing. Lower power supply voltages significantly reduce noise margins and increase variations in process, device and design parameters. Consequently, it is steadily more difficult to control the fabrication process precisely enough to maintain uniformity. The inherent randomness of materials used in fabrication at nanoscopic scales means that performance will be increasingly variable, not only from die-to-die but also within each individual die. Parametric variability will be compounded by degradation in nanoscale integrated circuits resulting in instability of parameters over time, eventually leading to the development of faults. Process variation cannot be solved by improving manufacturing tolerances; variability must be reduced by new device technology or managed by design in order for scaling to continue. Similarly, within-die performance variation also imposes new challenges for test methods. In an attempt to address these issues, Low-Power High-Resolution Analog-to-Digital Converters specifically focus on: i) improving the power efficiency for the high-speed, and low spurious spectral A/D conversion performance by exploring the potential of low-voltage analog design and calibration techniques, respectively, and ii) development of circuit techniques and algorithms to enhance testing and debugging potential to detect errors dynamically, to isolate and confine faults, and to recover errors continuously. The feasibility of the described methods has been verified by measurements from the silicon prototypes fabricated in standard 180nm, 90nm and 65nm CMOS technology.
| Author | : |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2021 |
| Genre | : |
| ISBN | : |
| Author | : Gabriele Manganaro |
| Publisher | : Cambridge University Press |
| Total Pages | : 251 |
| Release | : 2011-11-17 |
| Genre | : Technology & Engineering |
| ISBN | : 1139504746 |
Need to get up to speed quickly on the latest advances in high performance data converters? Want help choosing the best architecture for your application? With everything you need to know about the key new converter architectures, this guide is for you. It presents basic principles, circuit and system design techniques and associated trade-offs, doing away with lengthy mathematical proofs and providing intuitive descriptions upfront. Everything from time-to-digital converters to comparator-based/zero-crossing ADCs is covered and each topic is introduced with a short summary of the essential basics. Practical examples describing actual chips, along with extensive comparison between architectural or circuit options, ease architecture selection and help you cut design time and engineering risk. Trade-offs, advantages and disadvantages of each option are put into perspective with a discussion of future trends, showing where this field is heading, what is driving it and what the most important unanswered questions are.
