Basics on Delta-Sigma Converters

Abstract

Industrial applications often require a high resolution and performance from an analog-to-digital converter at a moderate speed (see Chap. 1), so that SAR ADCs (Chaps. 2 and 3) and delta-sigma ADCs are most commonly used. This chapter will therefore concentrate on the basics of delta-sigma converters and then on the discrete-time approach utilizing the switched-capacitor technique, which is most commonly used. The alternative continuous-time architecture will be discussed in Chap. 5.