Analog Interfaces for Digital Signal Processing Systems

It is a great honor to provide an introduction for Dr. Frank Op 't Eynde's and Dr. Willy Sansen's book "Analog Interfaces for Digital Signal Processing Systems". The field of analog integrated circuit design is undergoing rapid evolution. The pervasiveness of digital processing has considerably modified the micro-system architectures: the analog part of complex mixed systems is more and more pushed at the boundary limits of the processing chain. Moreover, the increased performance of digital circuits, in terms of accuracy and speed, are making the specification requirements of analog circuits very strict. In addition to this, the technology, supply voltage and power consumption of analog circuits must be compatible with those, typical for digital circuits. Therefore, in a few words, analog circuits are becoming complex and specialised interfaces between the real world and digital signal processing domains. This technological evolution should be accompanied by an equivalently fast evolution in designer competencies. Knowledge of complicated signal handling should be quickly replaced by know-how of simple but very accurate and very fast signal processing and a solid background in data conversion techniques. All of this through the use of the CMOS (and possibly BiCMOS) technology.

1. The Power Consumption of CMOS Wideband Amplifiers.- 1.1. Introduction: Why CMOS HF Amplifiers?.- 1.2. The HF Characteristics of a MOSFET.- 1.3. Power Minimisation of Wideband OTAS.- 1.4. Practical Realisations and Experimental Results of the Two HF Amplifiers.- 1.5. Summary.- 1.6. References.- 2. Low-Distortion CMOS Amplifier Design.- 2.1. Introduction.- 2.2. Basic Definitions, Techniques and Expressions.- 2.3. The Relationship between the CMRR and the Harmonic Distortion of a Differential Input Amplifier.- 2.4. The Second Harmonic Distortion of a Class a Amplifier with Limited Power Supply Rejection RATIO.- 2.5. Distortion Due to Thermal Feedback.- 2.6. A Design Example: A CMOS Low-Distortion Class AB Power Amplifier.- 2.7. Summary.- 2.8. References.- Appendix 2.A: Some Remarks about the Volterra Series.- 3. Oversampled A-TO-D and D-TO-A Converters.- 3.1. Introduction.- 3.2. Analog signals versus digital signals.- 3.3. The Principle of Oversampled Data Converters.- 3.4. The Quantisation Noise of Sigma-Delta Modulators.- 3.5. A Comparison of Sigma-Delta Modulation with Other Data Converter Types: When to Use What?.- 3.6. Signal Processing Operations in the PDM Domain.- 3.7. Simulating Sigma-Delta Modulators.- 3.8. Testing A/D AND D/A Converters.- 3.9. Summary.- 3.10. References.- 4. Higher-Order Sigma-Delta A-TO-D Converters.- 4.1. Introduction.- 4.2. The Stability of Sigma-Delta Modulators with an Order Larger than Two.- 4.3. Practical Design Considerations for Sigma-Delta ADCS.- 4.4. A Practical Realisation of a Fourth-Order ADC.- 4.5. Alternative Approaches for Higher-Order Sigma-Delta Modulators.- 4.6. Summary.- 4.7. References.- Appendix 4.A. Some Distortion Generation Mechanisms in a Sigma-Delta ADC.- 5. The Practical Implementation of Sigma-Delta D-TO-A Converters.- 5.1. Introduction.- 5.2. A Voltage Driven DAC.- 5.3. A Current Driven DAC.- 5.4. A Switched-Capacitor DAC.- 5.5. Summary.- 5.6. References.