Comparative evaluation of delta-sigma modulator structures used in the oversampling A/D converters

• Autorzy: Hejn K. , Kale I. , Kurek A.
• Języki publikacji: EN

Abstrakty

EN

The work reported in this paper focuses on computer simulations of Delta-Sigma modulators for oversampling Analog-to-Digltal (AD) converters. It calls into question the efficacy of traditional additive white noise techniques for modeling and analyzing the asymptotic statistical properties of quantization errors that arise in single and multistage oversampling modulators. The potential of the Comdisco - SPW on the SunSPARCl platform has been utilized for estimating gain error commonly used for data acquisition AD converters. It has been shown that the cascaded structure (type delta-sigma11 consisting of two first-order modulators) works much better than the common second-order modulator (type delta-sigma). The simulations results obtained have exhibited that the cascaded structure (type delta-sigma) with differential first-order modulators has the potential of 20 bit amplitude resolution within acoustic signal bandwidth.

Słowa kluczowe

EN

delta-sigma modulator; converters; analog-digital converters

PL

modulator sigma-delta; konwertory; konwertory analogowo-cyfrowe

• Wydawca: Przemysłowy Instytut Elektroniki
• Czasopismo: Prace Przemysłowego Instytutu Elektroniki
• Rocznik: 1998
• Tom: nr 132
• Strony: 35--40
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Hejn K.

autor

Kale I.

autor

Kurek A.

• Institute of Electronics Fundamentals, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland