TABLE OF CONTENTS This and the next chapter present a complete methodology for digital compensation of analog circuits. In chapter 3, all the necessary circuits are presented. Chapter 4 focuses on the design methodology for digitally compensated circuits. The techniques and circuits presented are based on successive approximations algorithms. After an introduction to the algorithm and its working condition, sub-binary digital-to-analog converters are presented. As successive approximations algorithms neither require monotonic nor linear converters, it is possible to design very high-resolution sub-binary DACs with limited design effort. Different subbinary topologies are described in this chapter, in particular the current-mode M/2 + M converter.
Among the compensation techniques presented in chapter 2, the digital correction is the most versatile. Without requiring major adaptations, it can be used in a large variety of situations to compensate for analog circuit imperfections.
This chapter presents successively all the elements needed for digital compensation. First, the successive approximations algorithm is presented. Then, different structures of digital-to-analog converters that can be used in conjunction with this algorithm are studied and their performance compared.
