The book gives an overview of the state-of-the-art in SigmaDelta design and of the challenges for future realizations. It 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.
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.
Inhaltsverzeichnis
List of symbols and abbreviations. 1 Introduction. 2 The signal conditioning channel. 3 SigmaDelta A/D conversion. 4 Power consumption in channel building blocks. 5 Full-analog and full-digital conditioning channels. 6 Conditioning SigmaDelta ADCs. 7 Digitization of the inter-die interface. 8 Highly analog and highly digital channels for FM/AM radio. 9 Conditioning SigmaDelta ADCs for Bluetooth. 10 General conclusions. A. Overview of published SigmaDelta ADCs. B. Power/performance relation of analog circuits. C. Power/performance relation of digital filters. D. Third-order distortion in analog circuits and SigmaDelta ADCs. E. Power consumption in a data interface. References.
