Maurits Ortmanns – författare

This book explores the rationale behind using incremental analog-to-digital converters (IADCs), delving into their theoretical principles, tradeoffs, and practical considerations in architectural and circuit design. The authors provide a general foundational knowledge, exploring the history of incremental operation and revising the working principle of free-running Delta-Sigma ADCs, in order to compare them with the incremental ADC. The IADC revises time- and frequency domain approaches to understand the incremental ADC as a periodically time-variant mixed-signal system. Various options for the reconstruction filter are revised together with system level design approaches and tools. The influence of non-idealities and countermeasures are analyzed and simulated. Enhanced architectures are finally explored and compared to give the reader a complete overview of the topic of Incremental ADCs.

Sigma-delta A/D converters are a key building block in wireless and multimedia applications. This comprehensive book deals with all relevant aspects arising during the analysis, design and simulation of the now widespread continuous-time implementations of sigma-delta modulators. The results of several years of research by the authors in the field of CT sigma-delta modulators are covered, including the analysis and modeling of different CT modulator architectures, CT/DT loop filter synthesis, a detailed error analysis of all components, and possible compensation/correction schemes for the non-ideal behavior in CT sigma-delta modulators. Guidance for obtaining low-power consumption and several practical implementations are also presented. It is shown that all the proposed new theories, architectures and possible correction techniques have been confirmed by measurements on discrete or integrated circuits. Quantitative results are also provided, thus enabling prediction of the resulting accuracy.