This volume presents architectures, circuits, models, methods and practical considerations for the design of high-performance low-pass switched-capacitor (SC) sigma-delta A/D interfaces for mixed-signal CMOS ASICs. Main focus is on cascade architectures, although considerations pertaining to circuits and error analysis are general and hence valid for other architectures. The book differs from others in the complete, in-depth coverage of SC circuit errors, in the detailed elaboration and description of practical design plan, and in the thorough presentation of considerations leading to practical high-performance designs. Another differentiating feature of this book is the coverage into a unified description of largely different application areas.

As the trend to system-on-chip solutions gradually consolidates, including an ever-increasing usage of digital signal processing, a concurrent enhancement of the analog front-end performance is required. Moreover, such enhanced performances must be achieved under the constraints imposed by digitally driven technology roadmaps, with low-voltage supplies, poor-performance (and often badly characterized) devices ... and above all the unavoidable presence of noisy digital circuits. It is under the pressure of these challenges that analog designers must sharpen their wits to overcome the problems. Supported by both designers' ingenuity and slow, but precious, improvements of digital CMOS technologies, the results of recent research confirm that solutions can be found.
In consonance with this trend, CMOS Telecom Data Converters compiles the latest achievements regarding the design of high-speed and high-resolution data converters in deep submicron CMOS technologies. The four types of analog-to-digital converter architectures commonly found in this arena are covered, namely sigma-delta, pipeline, folding/interpolating and flash. For all these types, latest achievements regarding the solution of critical architectural and circuital issues are presented, and illustrated through IC prototypes with measured state-of-the-art performances. Some of these prototypes are conceived to be employed at the chipset of newest generation wireline modems (ADSL and ADSL+). Others are intended for wireless transceivers. Besides analog-to-digital converters, the book also covers other functions needed for communication systems, such as digital-to-analog converters, analog filters, programmable gainamplifiers, digital filters, and line drivers.
In addition to case studies on state-of-the-art converters, the book includes overview chapters aimed at presenting the existing knowledge in a structured, comprehensive style. Nyquist converters and sigma-delta converters are covered in such a way. The overview chapters are complemented with chapters devoted to describing basic methodologies and tools needed for designing telecom analog-to-digital converters and capturing designers' expertise for re-usability.
CMOS Telecom Data Converters provides unique information for those interested in designing converters with state-of-the-art performance for the latest generation of communication systems. Since this unique information is embedded in tutorial descriptions, the book can also be used as a valuable reference for non-expert readers willing to learn basic concepts as well as practical recipes for the design of CMOS data converters.

The interest for :I:~ modulation-based NO converters has significantly increased in the last years. The reason for that is twofold. On the one hand, unlike other converters that need accurate building blocks to obtain high res olution, :I:~ converters show low sensitivity to the imperfections of their building blocks. This is achieved through extensive use of digital signal pro cessing - a desirable feature regarding the implementation of NO interfaces in mainstream CMOS technologies which are better suited for implementing fast, dense, digital circuits than accurate analog circuits. On the other hand, the number of applications with industrial interest has also grown. In fact, starting from the earliest in the audio band, today we can find :I:~ converters in a large variety of NO interfaces, ranging from instrumentation to commu nications. These advances have been supported by a number of research works that have lead to a considerably large amount of published papers and books cov ering different sub-topics: from purely theoretical aspects to architecture and circuit optimization. However, so much material is often difficultly digested by those unexperienced designers who have been committed to developing a :I:~ converter, mainly because there is a lack of methodology. In our view, a clear methodology is necessary in :I:~ modulator design because all related tasks are rather hard.

Institutional book, not really for bookstore catalogue The book contains valuable information structured to provide insight on how to design SC sigma-delta modulators. It presents architectures, circuits, models, methods and practical considerations for the design of high-performance low-pass switched-capacitor (SC) sigma-delta A/D interfaces for mixed-signal CMOS ASICs. The main focus of the book is on cascade architectures. It differs from other books in the complete, in-depth coverage of SC circuit errors.

As the trend to system-on-chip solutions gradually consolidates, including an ever-increasing usage of digital signal processing, a concurrent enhancement of the analog front-end performance is required. Moreover, such enhanced performances must be achieved under the constraints imposed by digitally driven technology roadmaps, with low-voltage supplies, poor-performance (and often badly characterized) devices ... and above all the unavoidable presence of noisy digital circuits. It is under the pressure of these challenges that analog designers must sharpen their wits to overcome the problems. Supported by both designers' ingenuity and slow, but precious, improvements of digital CMOS technologies, the results of recent research confirm that solutions can be found.
In consonance with this trend, CMOS Telecom Data Converters compiles the latest achievements regarding the design of high-speed and high-resolution data converters in deep submicron CMOS technologies. The four types of analog-to-digital converter architectures commonly found in this arena are covered, namely sigma-delta, pipeline, folding/interpolating and flash. For all these types, latest achievements regarding the solution of critical architectural and circuital issues are presented, and illustrated through IC prototypes with measured state-of-the-art performances. Some of these prototypes are conceived to be employed at the chipset of newest generation wireline modems (ADSL and ADSL+). Others are intended for wireless transceivers. Besides analog-to-digital converters, the book also covers other functions needed for communication systems, such as digital-to-analog converters, analog filters, programmable gain amplifiers, digital filters, and line drivers.
In addition to case studies on state-of-the-art converters, the book includes overview chapters aimed at presenting the existing knowledge in a structured, comprehensive style. Nyquist converters and sigma-delta converters are covered in such a way. The overview chapters are complemented with chapters devoted to describing basic methodologies and tools needed for designing telecom analog-to-digital converters and capturing designers' expertise for re-usability.
CMOS Telecom Data Converters provides unique information for those interested in designing converters with state-of-the-art performance for the latest generation of communication systems. Since this unique information is embedded in tutorial descriptions, the book can also be used as a valuable reference for non-expert readers willing to learn basic concepts as well as practical recipes for the design of CMOS data converters.

The interest for :I:~ modulation-based NO converters has significantly increased in the last years. The reason for that is twofold. On the one hand, unlike other converters that need accurate building blocks to obtain high res olution, :I:~ converters show low sensitivity to the imperfections of their building blocks. This is achieved through extensive use of digital signal pro cessing - a desirable feature regarding the implementation of NO interfaces in mainstream CMOS technologies which are better suited for implementing fast, dense, digital circuits than accurate analog circuits. On the other hand, the number of applications with industrial interest has also grown. In fact, starting from the earliest in the audio band, today we can find :I:~ converters in a large variety of NO interfaces, ranging from instrumentation to commu nications. These advances have been supported by a number of research works that have lead to a considerably large amount of published papers and books cov ering different sub-topics: from purely theoretical aspects to architecture and circuit optimization. However, so much material is often difficultly digested by those unexperienced designers who have been committed to developing a :I:~ converter, mainly because there is a lack of methodology. In our view, a clear methodology is necessary in :I:~ modulator design because all related tasks are rather hard.