Low-Power Low-Voltage Sigma-Delta Modulators in Nanometer CMOS [Paperback]

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Low-Power Low-Voltage Sigma-Delta Modulators in Nanometer CMOS addresses the low-power low-voltage Sigma-Delta ADC design in nanometer CMOS technologies at both the circuit-level and the system level.

The low-power low-voltage Sigma-Delta modulator design at the circuit level is introduced. A design example is presented in this book. This design is the first published Sigma-Delta design in a 90-nm CMOS technology and reaches a very high figure-of-merit.

At the system level, a novel systematic study on the full feedforward Sigma-Delta topology is presented in this book. As a design example, a fourth-order single-loop full feedforward Sigma-Delta modulator design in a 130-nm pure digital CMOS technology is presented. This design is the first design using the full feedforward Sigma-Delta topology and reaches the highest conversion speed among all the 1-V Sigma-Delta modulators to date.

Abstract Contents List of Tables List of Figures Symbols and Abbreviations Physical Definitions 1 Introduction 1.1 Motivation 1.2 Outline of the work 2 ADCs in Deep-Submicron CMOS Technologies 2.1 Introduction 2.2 Scaling-Down of CMOS Technologies 2.2.1 Driving Force of the CMOS Scaling-Down 2.2.2 Moving Into Deep-Submicron CMOS Technologies 2.3 Impact of Moving Into Deep-Submicron CMOS to Analog Circuits 2.3.1 Decreased Supply Voltage 2.3.2 Impact on Transistor Intrinsic Gain 2.3.3 Impact on Device Matching 2.3.4 Impact on Device Noise 2.4 ADCs In Deep-Submicron CMOS 2.4.1 Decreased Signal Swing 2.4.2 Degraded Transistor Characteristics 2.4.3 Distortion 2.4.4 Switch Driving 2.4.5 Improved Device Matching 2.4.6 Digital Circuits Advantages 2.5 Conclusion 3 Principle of sigma-delta ADC 3.1 Introduction 3.2 Basic Analog to Digital Conversion 3.3 Oversampling and Noise Shaping 3.3.1 Oversampling 3.3.2 Noise Shaping 3.3.3 sigma-delta modulator 3.3.4 Performal³*