DESIGN OF SECOND-ORDER SIGMA-DELTA MODULATOR USING CMOS TECHNOLOGY

Stable equilibrium study cascaded one bit sigma-delta modulator In the paper defines a boundary of stability zone for sigma-delta modulator. The boundary depends from inner sigma-delta modulator coefficients. For designing purposes such result could use to find or compare some appropriate schemes with each other. It's proved some statements and showed that boundary could be found theoretically ...

This paper presents a tutorial overview of ContinuousTime Delta-Sigma Modulators (CTDSM); their operating principles to understand what is important intuitively and architectures to achieve higher conversion efficiency and to operate low supply voltage, design methods against loop stability problem, tuning methods of the bandwidth and so on. A survey of cutting-edge CMOS implementations is desc...

In previous work [ 11, we have proposed an adaptive sigma delta modulator with improved dynamic range. The modulator adapts the step-size of the quantizer from estimates of the quantizer input. In this paper, we conduct a stability analysis of the new modulator.

A simple yet efficient class of coding systems employed extensively in coding correlated sources is the DPCM and delta modulation systems. We will study the performance of the adaptive and the simple delta modulators at high sampling rates and will compare that to the performance of well designed DPCM systems. The results are obtained by simulating the coding systems on a digital computer and u...

Classical delta-sigma modulation gains resolution through temporal oversampling by using a high-speed, low-resolution quantizer and shaping the resulting quantization errors out of the signal band. Likewise, spatial delta-sigma modulation is often used in image halftoning to create high-visual-quality binary images. We consider combining spatial and temporal delta-sigma modulation to reduce tem...

We propose access control protocols for integrated voice/data CDMA systems that are based on estimating the residual capacity available for data users. The residual capacity is derived from the feasibility condition for power control using an adaptive prediction technique based on Delta Modulation. The analysis is extended for the case of imperfect power control. Two access control protocols ar...