Some Characteristics of Broadband Delta-Sigma Modulation

Abstract

This paper presents an analysis using correlation techniques of an idealized Delta-Sigma Modulation system. An analytical assumption of errors with a marginally Gaussian distribution is shown to yield accurate results for broadband modulation with a maximum input-output cross correlation. It is also shown that this maximum is greatest for the degenerate case of only "hard limiting" with no feedback and no integration. A case of highly correla~ed inputs for Delta- Sigma Modulation is also discussed to compare it with broad- band performance and "hard limiting."