Delta modulation was introduced in the 1940s as a simplified form of pulse code modulation (PCM), which required a difficult-to-implement analog-to-digital (A/D) converter.

Lesson 14 Delta Modulation (DM) After reading this lesson, you will learn about Principles and features of Delta Modulation; Advantages and limitations of Delta Modulation; Slope overload distortion; …

The main disadvantage of the DM scheme is the presence of an accumulative error in the demodulated signal This problem can be solved by using a delta-sigma modulator

DM modulator and demodulator are shown below. The comparator computes the difference between two inputs. The quantizer consists of hard limiter with an input/output relation that is scaled version of …

Delta-Sigma nal-to-noise ratio (SNR). An efficient solution for resolu-tions above approximately 12 b, DSMs are extensively used in a alog and RF applications. In this article, we study the fundam

Abstract—This paper presents a tutorial overview of mod-ulators, their operating principles and architectures, circuit errors and models, design methods, and practical issues.

R. M. Gray, “Spectral analysis of quantization noise in a single-loop sigma-delta modulator with dc input,” IEEE Transactions on Communications, vol. 37, no. 6, pp. 588-599, June 1989.