Ebook: ΣΔ A/D CONVERSION FOR SIGNAL CONDITIONING

1.1 Background Moore’s Law predicts a decrease by a factor of two in the feature size of CMOS te- nology every three years and has been valid for years. It implies a doubling of the - eration speed and a four times higher transistor count per unit of area, every three years. The combination leads to an eight times higher processing capability per unit of area. This on-going miniaturization allows the integration of complex electronic systems with millions of transistors (Very-Large-Scale-Integration) and enables the integration of el- tronic systems. An electronic system A generic picture of an integrated electronic system is shown in ?g. 1.1. The heart of the system is the signal processing core. This core supports a wide variety of functions, such as customization and programmability of multiple applications, channel coding, the de?nition of the user interface, etc. These functions are enabled by DSP, a controller CPU and various blocks of memory. In advanced ICs these blocks provide (almost) all signal processing and usually dominate in the overall power and area consumption of integrated systems. The huge data rates involved, require high-speed busses for communication between these blocks. A power-management unit fuels the system by providing the - propriate supply voltages and currents.

This book addresses the application of continuous-time SigmaDelta A/D converters in receivers for a.o. wireless communication. In particular, it focuses on their assets for digitizing such channels.

It gives an overview of SigmaDelta design and of the challenges for future realizations, and provides an understanding of the fundamental power efficiency of SigmaDelta converters. In addition, it presents an analysis of the power consumption in the decimation filter.

Understanding these power/performance trade-offs, it becomes clear that straight-forward digitization of a conditioning channel, i.e. exchanging analog for digital conditioning, comes at a major power penalty.

Furthermore, the book proposes an alternative vision on digitization: because of its inherent immunity to interferers, part of the signal conditioning can be integrated into the continuous-time SigmaDelta A/D converter. This approach results in a major improvement of the power/performance balance of the entire channel.

The book is essential reading for mixed-signal and RF designers who want to familiarize with the basics of SigmaDelta design. For the experienced designer and for

This book addresses the application of continuous-time SigmaDelta A/D converters in receivers for a.o. wireless communication. In particular, it focuses on their assets for digitizing such channels.

It gives an overview of SigmaDelta design and of the challenges for future realizations, and provides an understanding of the fundamental power efficiency of SigmaDelta converters. In addition, it presents an analysis of the power consumption in the decimation filter.

Understanding these power/performance trade-offs, it becomes clear that straight-forward digitization of a conditioning channel, i.e. exchanging analog for digital conditioning, comes at a major power penalty.

Furthermore, the book proposes an alternative vision on digitization: because of its inherent immunity to interferers, part of the signal conditioning can be integrated into the continuous-time SigmaDelta A/D converter. This approach results in a major improvement of the power/performance balance of the entire channel.

The book is essential reading for mixed-signal and RF designers who want to familiarize with the basics of SigmaDelta design. For the experienced designer and for
Content:
Front Matter....Pages I-X
Introduction....Pages 1-7
The signal conditioning channel....Pages 9-20
?? A/D conversion....Pages 21-35
Power consumption in channel building blocks....Pages 37-56
Full-analog and full-digital conditioning channels....Pages 57-65
Conditioning ?? ADCs....Pages 67-104
Digitization of the inter-die interface....Pages 105-111
Highly analog and highly digital channels for FM/AM radio....Pages 113-138
Conditioning ?? ADCs for Bluetooth....Pages 139-189
General conclusions....Pages 191-192
Back Matter....Pages 193-227

This book addresses the application of continuous-time SigmaDelta A/D converters in receivers for a.o. wireless communication. In particular, it focuses on their assets for digitizing such channels.

It gives an overview of SigmaDelta design and of the challenges for future realizations, and provides an understanding of the fundamental power efficiency of SigmaDelta converters. In addition, it presents an analysis of the power consumption in the decimation filter.

Understanding these power/performance trade-offs, it becomes clear that straight-forward digitization of a conditioning channel, i.e. exchanging analog for digital conditioning, comes at a major power penalty.

Furthermore, the book proposes an alternative vision on digitization: because of its inherent immunity to interferers, part of the signal conditioning can be integrated into the continuous-time SigmaDelta A/D converter. This approach results in a major improvement of the power/performance balance of the entire channel.

The book is essential reading for mixed-signal and RF designers who want to familiarize with the basics of SigmaDelta design. For the experienced designer and for
Content:
Front Matter....Pages I-X
Introduction....Pages 1-7
The signal conditioning channel....Pages 9-20
?? A/D conversion....Pages 21-35
Power consumption in channel building blocks....Pages 37-56
Full-analog and full-digital conditioning channels....Pages 57-65
Conditioning ?? ADCs....Pages 67-104
Digitization of the inter-die interface....Pages 105-111
Highly analog and highly digital channels for FM/AM radio....Pages 113-138
Conditioning ?? ADCs for Bluetooth....Pages 139-189
General conclusions....Pages 191-192
Back Matter....Pages 193-227
....